{"id":1804,"date":"2019-05-22T02:48:07","date_gmt":"2019-05-22T02:48:07","guid":{"rendered":"http:\/\/www.meetyoucarbide.com\/single-post-the-commonly-used-analog-calculation-method-in-the-field-of-lithium\/"},"modified":"2020-05-04T13:12:03","modified_gmt":"2020-05-04T13:12:03","slug":"the-commonly-used-analog-calculation-method-in-the-field-of-lithium","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/phuong-phap-tinh-tuong-tu-thuong-dung-trong-truong-cua-liti\/","title":{"rendered":"Ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n t\u01b0\u01a1ng t\u1ef1 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong l\u0129nh v\u1ef1c lithium"},"content":{"rendered":"
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Trong nh\u1eefng th\u1eadp k\u1ef7 g\u1ea7n \u0111\u00e2y, pin lithium-ion \u0111\u00e3 thu h\u00fat s\u1ef1 ch\u00fa \u00fd trong l\u0129nh v\u1ef1c v\u1eadt li\u1ec7u n\u0103ng l\u01b0\u1ee3ng. \u0110\u1ed3ng th\u1eddi, v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a l\u00fd thuy\u1ebft c\u01a1 b\u1ea3n v\u00e0 l\u0129nh v\u1ef1c m\u00e1y t\u00ednh, nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p m\u00f4 ph\u1ecfng t\u00ednh to\u00e1n \u0111\u00e3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong nghi\u00ean c\u1ee9u pin lithium-ion. Do sai s\u00f3t trong qu\u00e1 tr\u00ecnh th\u00ed nghi\u1ec7m, c\u00e1c quy m\u00f4 vi m\u00f4, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u01a1 ch\u1ebf ph\u00e1t tri\u1ec3n c\u1ee7a m\u00e0ng SEI, \u0111\u1ed9ng l\u1ef1c khu\u1ebfch t\u00e1n c\u1ee7a c\u00e1c ion trong v\u1eadt li\u1ec7u \u0111i\u1ec7n c\u1ef1c, s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u1ea5u tr\u00fac trong qu\u00e1 tr\u00ecnh t\u00edch \u0111i\u1ec7n v\u00e0 ph\u00f3ng \u0111i\u1ec7n c\u1ee7a v\u1eadt li\u1ec7u \u0111i\u1ec7n c\u1ef1c, m\u1ed1i quan h\u1ec7 gi\u1eefa \u0111i\u1ec7n th\u1ebf v\u00e0 c\u1ea5u tr\u00fac, v\u00e0 s\u1ef1 ph\u00e2n b\u1ed1 c\u1ee7a c\u00e1c l\u1edbp \u0111i\u1ec7n t\u00edch kh\u00f4ng gian kh\u00f4ng th\u1ec3 gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c. Nh\u1eefng k\u1ebft lu\u1eadn tr\u1ef1c quan, ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c nghi\u1ec7m kh\u00f4ng th\u1ec3 \u0111\u01b0a ra l\u1eddi gi\u1ea3i th\u00edch l\u00fd thuy\u1ebft r\u00f5 r\u00e0ng. Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p m\u00f4 ph\u1ecfng t\u00ednh to\u00e1n c\u00f3 l\u1ee3i th\u1ebf t\u01b0\u01a1ng \u0111\u1ed1i trong vi\u1ec7c hi\u1ec3u \u0111\u01b0\u1ee3c s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u00f3a h\u1ecdc b\u00ean trong v\u00e0 \u0111i\u1ec7n h\u00f3a h\u1ecdc c\u1ee7a pin lithium-ion. C\u00e1c t\u00ednh to\u00e1n l\u00fd thuy\u1ebft x\u00e1c minh k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m c\u1ee7a v\u1eadt li\u1ec7u pin lithium-ion, \u0111\u1ed3ng th\u1eddi th\u00fac \u0111\u1ea9y v\u00e0 h\u01b0\u1edbng d\u1eabn s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a v\u1eadt li\u1ec7u pin. D\u01b0\u1edbi \u0111\u00e2y ch\u00fang t\u00f4i gi\u1edbi thi\u1ec7u m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n t\u01b0\u01a1ng t\u1ef1 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang trong pin lithium-ion.<\/div>\n

\u1ee8ng d\u1ee5ng c\u1ee7a l\u00fd thuy\u1ebft h\u00e0m m\u1eadt \u0111\u1ed9<\/h2>\n
L\u00fd thuy\u1ebft h\u00e0m m\u1eadt \u0111\u1ed9 \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nghi\u00ean c\u1ee9u pin lithium ion. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh to\u00e1n \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ea5u tr\u00fac, ti\u1ec1m n\u0103ng ch\u00e8n lithium, c\u1ea5u tr\u00fac \u0111i\u1ec7n t\u1eed, d\u1ea3i n\u0103ng l\u01b0\u1ee3ng, c\u1ea5u tr\u00fac th\u01b0 gi\u00e3n, n\u0103ng l\u01b0\u1ee3ng t\u1ea1o khuy\u1ebft t\u1eadt, \u0111\u01b0\u1eddng di chuy\u1ec3n, n\u0103ng l\u01b0\u1ee3ng k\u00edch ho\u1ea1t v\u00e0 lithium. C\u00e1c t\u00ednh ch\u1ea5t nh\u01b0 \u0111\u1ed9ng h\u1ecdc v\u1eadn chuy\u1ec3n ion v\u00e0 \u0111\u1ed9 \u0111\u1eadm \u0111\u1eb7c c\u1ee7a qu\u00e1 tr\u00ecnh chuy\u1ec3n pha lithium.<\/div>\n
Gi\u00e1 tr\u1ecb \u0111i\u1ec7n \u00e1p c\u1ee7a pin l\u00e0 m\u1ed9t tham s\u1ed1 li\u00ean quan \u0111\u1ebfn s\u1ef1 thay \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng t\u1ef1 do c\u1ee7a ph\u1ea3n \u1ee9ng pin. C\u00e1c v\u1eadt li\u1ec7u kh\u00e1c nhau c\u00f3 ti\u1ec1m n\u0103ng ch\u00e8n liti v\u1ed1n c\u00f3. V\u1eadt li\u1ec7u l\u00e0m \u0111i\u1ec7n c\u1ef1c l\u00fd t\u01b0\u1edfng l\u00e0 c\u00f3 \u0111i\u1ec7n th\u1ebf cao h\u01a1n \u0111\u1ed1i v\u1edbi \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng, \u0111i\u1ec7n th\u1ebf th\u1ea5p h\u01a1n \u0111\u1ed1i v\u1edbi \u0111i\u1ec7n c\u1ef1c \u00e2m v\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u0111i\u1ec7n th\u1ebf gi\u1eefa c\u00e1c \u0111i\u1ec7n c\u1ef1c kh\u00e1c nhau. N\u0103ng l\u01b0\u1ee3ng pin lithium-ion c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ednh theo ph\u1ea3n \u1ee9ng c\u1ee7a pin: (C\u00f4ng su\u1ea5t 1 mol electron \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng F, v\u00e0 c\u00f4ng su\u1ea5t e\u2212 c\u1ee7a electron l\u00e0<\/div>\n
1,602 \u00d7 10\u221219 C) F = NA \u00b7 e\u2212 = 96487,56 C \/ mol<\/div>\n
G\u1ecdi n l\u00e0 s\u1ed1 \u0111i\u1ec7n t\u00edch chuy\u1ec3n \u0111\u01b0\u1ee3c trong qu\u00e1 tr\u00ecnh ph\u1ea3n \u1ee9ng c\u1ee7a pin, khi \u0111\u00f3 c\u00f4ng qua pin l\u00e0 nF, c\u00f4ng c\u1ef1c \u0111\u1ea1i m\u00e0 pin th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c l\u00e0:<\/div>\n
\u2212Wr’=nFVAVE<\/div>\n
Trong \u0111i\u1ec1u ki\u1ec7n \u0111\u1eb3ng nhi\u1ec7t \u0111\u1eb3ng t\u00edch, n\u0103ng l\u01b0\u1ee3ng t\u1ef1 do Gibbs c\u1ee7a h\u1ec7 b\u1eb1ng c\u00f4ng c\u1ee7a h\u1ec7 \u0111\u1ed1i v\u1edbi th\u1ebf gi\u1edbi b\u00ean ngo\u00e0i:<\/div>\n
\u0394G=\u2212Wr’<\/div>\n
\u0394G = nFVAVE \uff0c V\u00e0 v\u00ec Li + c\u00f3 \u0111\u01a1n v\u1ecb \u0111i\u1ec7n t\u00edch n\u00ean VAVE = \u0394G \/ F<\/div>\n
\u0394G l\u00e0 n\u0103ng l\u01b0\u1ee3ng t\u1ef1 do Gibbs c\u1ee7a ph\u1ea3n \u1ee9ng pin, gi\u1ea3 s\u1eed r\u1eb1ng s\u1ef1 thay \u0111\u1ed5i v\u1ec1 th\u1ec3 t\u00edch v\u00e0 entropi do ph\u1ea3n \u1ee9ng nh\u00fang t\u1ebf b\u00e0o g\u00e2y ra l\u00e0 kh\u00f4ng \u0111\u00e1ng k\u1ec3, th\u00ec<\/div>\n
\u0394G\u2248\u0394E<\/div>\n
v\u00ec v\u1eady \uff1a VAVE = \u0394E \/ F<\/div>\n
\u0110\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng pin trong \u0111\u00f3 \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng l\u00e0 LiA v\u00e0 \u0111i\u1ec7n c\u1ef1c \u00e2m l\u00e0 B, gi\u1ea3 thi\u1ebft r\u1eb1ng x liti \u0111\u01b0\u1ee3c t\u00e1ch ra kh\u1ecfi LiA v\u00e0 nh\u00fang v\u00e0o B sau khi s\u1ea1c (qu\u00e1 tr\u00ecnh s\u1ea1c d\u01b0\u01a1ng) v\u00e0 c\u00f4ng th\u1ee9c ph\u1ea3n \u1ee9ng l\u00e0:<\/div>\n
LiA + B \u2192 Li1 \u2212 xA + LixB<\/div>\n
\u0110i\u1ec7n \u00e1p trung b\u00ecnh c\u1ee7a qu\u00e1 tr\u00ecnh n\u00e0y l\u00e0 hi\u1ec7u gi\u1eefa n\u0103ng l\u01b0\u1ee3ng c\u1ee7a m\u1ed7i tr\u1ea1ng th\u00e1i cu\u1ed1i t\u01b0\u01a1ng \u1ee9ng c\u1ee7a liti (Li1-xA, LixB) v\u00e0 tr\u1ea1ng th\u00e1i ban \u0111\u1ea7u (LiA, B), sau \u0111\u00f3 l\u00e0 \u0111i\u1ec7n \u00e1p:<\/div>\n
V = [E (Li1 \u2212 xA) + E (LixB) \u2212E (LiA) \u2212E (B)] \/ xe<\/div>\n
Khi \u0111i\u1ec7n c\u1ef1c \u00e2m l\u00e0 liti kim lo\u1ea1i, n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u01a1n gi\u1ea3n h\u00f3a nh\u01b0 sau:<\/div>\n
V = [E (Li1 \u2212 xA) + E (Lix) \u2212E (LiA)] \/ xe<\/div>\n
B\u1eb1ng c\u00e1ch t\u00ednh t\u1ed5ng n\u0103ng l\u01b0\u1ee3ng c\u1ee7a m\u1ed7i ch\u1ea5t tr\u01b0\u1edbc v\u00e0 sau ph\u1ea3n \u1ee9ng, c\u00f3 th\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c th\u1ebf \u0111i\u1ec7n c\u1ef1c theo c\u00f4ng th\u1ee9c tr\u00ean. Tuy nhi\u00ean, \u0111\u1ed1i v\u1edbi h\u1ea7u h\u1ebft t\u1ea5t c\u1ea3 c\u00e1c v\u1eadt li\u1ec7u l\u00e0m cat\u1ed1t, \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c t\u00ednh theo l\u00fd thuy\u1ebft h\u00e0m m\u1eadt \u0111\u1ed9 l\u00e0 th\u1ea5p. B\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng hi\u1ec7u ch\u1ec9nh + U cho GGA ti\u00eau chu\u1ea9n, ngh\u0129a l\u00e0, ph\u01b0\u01a1ng ph\u00e1p GGA + U, ho\u1eb7c s\u1eed d\u1ee5ng HSE06 ch\u1ee9c n\u0103ng lai, c\u00f3 th\u1ec3 thu \u0111\u01b0\u1ee3c \u0111i\u1ec7n \u00e1p g\u1ea7n v\u1edbi gi\u00e1 tr\u1ecb th\u1eed nghi\u1ec7m h\u01a1n. Trong t\u00ednh to\u00e1n c\u1ee7a v\u1eadt li\u1ec7u cat\u1ed1t oxit c\u00f3 ch\u1ee9a c\u00e1c ion kim lo\u1ea1i chuy\u1ec3n ti\u1ebfp 3d, hi\u1ec7u \u1ee9ng t\u01b0\u01a1ng quan m\u1ea1nh \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn l\u00e0 m\u1ed9t hi\u1ec7u \u1ee9ng c\u1ea7n \u0111\u01b0\u1ee3c xem x\u00e9t.<\/div>\n

\"\"<\/p>\n

H\u00ecnh 1: GGA ti\u00eau chu\u1ea9n v\u00e0 GGA + U, HSE06 T\u00ednh to\u00e1n c\u00e1c ion liti kh\u00e1c nhau<\/div>\n

Ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ed9ng l\u1ef1c h\u1ecdc ph\u00e2n t\u1eed<\/h2>\n
T\u00ednh to\u00e1n nguy\u00ean t\u1eafc \u0111\u1ea7u ti\u00ean d\u1ef1a tr\u00ean h\u00e0m m\u1eadt \u0111\u1ed9 c\u00f3 th\u1ec3 thu \u0111\u01b0\u1ee3c c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u \u1edf tr\u1ea1ng th\u00e1i c\u01a1 b\u1ea3n \u1edf nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng. S\u1ef1 v\u1eadn chuy\u1ec3n c\u1ee7a c\u00e1c nguy\u00ean t\u1eed v\u00e0 ion trong v\u1eadt li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u b\u1eb1ng m\u00f4 ph\u1ecfng \u0111\u1ed9ng l\u1ef1c h\u1ecdc ph\u00e2n t\u1eed \u1edf nhi\u1ec7t \u0111\u1ed9 h\u1eefu h\u1ea1n. T\u00ednh to\u00e1n \u0111\u1ed9ng l\u1ef1c h\u1ecdc ph\u00e2n t\u1eed \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p m\u00f4 ph\u1ecfng c\u1ea5p nguy\u00ean t\u1eed s\u1eed d\u1ee5ng h\u00e0m th\u1ebf th\u1ef1c nghi\u1ec7m. So v\u1edbi ph\u01b0\u01a1ng ph\u00e1p nguy\u00ean t\u1eafc th\u1ee9 nh\u1ea5t, n\u00f3 c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n m\u00f4 ph\u1ecfng quy m\u00f4 l\u1edbn h\u01a1n, c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb t\u1ed1t h\u01a1n qu\u00e1 tr\u00ecnh khu\u1ebfch t\u00e1n \u0111\u1ed9ng ion lithium v\u00e0 ph\u00e2n t\u00edch n\u00f3.<\/div>\n
\u0110\u1ed9ng l\u1ef1c h\u1ecdc ph\u00e2n t\u1eed c\u00f3 th\u1ec3 m\u00f4 ph\u1ecfng s\u1ef1 ti\u1ebfn h\u00f3a c\u1ee7a c\u00e1c h\u1ea1t h\u1ec7 th\u1ed1ng theo th\u1eddi gian, nh\u00ecn v\u00e0o \u0111\u01b0\u1eddng di chuy\u1ec3n c\u1ee7a ion, t\u00ednh to\u00e1n h\u1ec7 s\u1ed1 khu\u1ebfch t\u00e1n c\u1ee7a c\u00e1c h\u1ea1t v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a v\u1eadt li\u1ec7u, nh\u01b0ng quy lu\u1eadt chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a h\u1ea1t l\u00e0 c\u01a1 h\u1ecdc Newton, v\u00e0 s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a c\u00e1c h\u1ea1t ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p. ch\u1eb3ng h\u1ea1n nh\u01b0 hydro v\u00e0 heli. Hi\u1ec7u \u1ee9ng t\u00ednh to\u00e1n hi\u1ec7u \u1ee9ng l\u01b0\u1ee3ng t\u1eed kh\u00f4ng l\u00fd t\u01b0\u1edfng. V\u1ec1 pin lithium-ion, \u0111\u1ed9ng l\u1ef1c h\u1ecdc ph\u00e2n t\u1eed c\u00f3 th\u1ec3 thu \u0111\u01b0\u1ee3c h\u1ec7 s\u1ed1 khu\u1ebfch t\u00e1n v\u00e0 \u0111\u01b0\u1eddng di chuy\u1ec3n c\u1ee7a c\u00e1c ion trong v\u1eadt li\u1ec7u, \u0111i\u1ec1u n\u00e0y cung c\u1ea5p cho ch\u00fang ta kh\u1ea3 n\u0103ng hi\u1ec3u \u0111\u01b0\u1ee3c c\u01a1 ch\u1ebf khu\u1ebfch t\u00e1n c\u1ee7a c\u00e1c ion trong v\u1eadt li\u1ec7u.<\/div>\n
Yang \u0111\u00e3 t\u00ednh to\u00e1n qu\u00e1 tr\u00ecnh t\u1ef1 khu\u1ebfch t\u00e1n c\u1ee7a LiFePO4 v\u00e0 nh\u1eadn th\u1ea5y r\u1eb1ng s\u1ef1 di chuy\u1ec3n c\u1ee7a Li + trong v\u1eadt li\u1ec7u kh\u00f4ng x\u1ea3y ra li\u00ean t\u1ee5c, m\u00e0 x\u1ea3y ra th\u00f4ng qua s\u1ef1 chuy\u1ec3n \u0111\u1ed5i gi\u1eefa c\u00e1c v\u1ecb tr\u00ed m\u1ea1ng tinh th\u1ec3 li\u1ec1n k\u1ec1. N\u0103m 2014, Zhang Jungan v\u00e0 nh\u1eefng ng\u01b0\u1eddi kh\u00e1c t\u1eeb \u0110\u1ea1i h\u1ecdc Th\u01b0\u1ee3ng H\u1ea3i \u0111\u00e3 s\u1eed d\u1ee5ng \u0111\u1ed9ng l\u1ef1c h\u1ecdc ph\u00e2n t\u1eed \u0111\u1ec3 m\u00f4 ph\u1ecfng h\u00e0nh vi khu\u1ebfch t\u00e1n c\u1ee7a c\u00e1c ion lithium gi\u1eefa c\u00e1c l\u1edbp graphite trong qu\u00e1 tr\u00ecnh s\u1ea1c. C\u00e1c \u0111\u1eb7c t\u00ednh khu\u1ebfch t\u00e1n ion liti c\u1ee7a v\u1eadt li\u1ec7u an\u1ed1t b\u1eb1ng than ch\u00ec \u1edf 300 K \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m cung c\u1ea5p d\u1eef li\u1ec7u c\u01a1 b\u1ea3n cho nghi\u00ean c\u1ee9u m\u00f4 h\u00ecnh quy m\u00f4 li\u00ean t\u1ee5c v\u1ec1 s\u1ef1 bi\u1ebfn d\u1ea1ng \u0111i\u1ec7n c\u1ef1c c\u1ee7a pin lithium ion.<\/div>\n

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H\u00ecnh 2: M\u00f4 ph\u1ecfng \u0111\u1ed9ng l\u1ef1c h\u1ecdc ph\u00e2n t\u1eed cho th\u1ea5y (a) qu\u1ef9 \u0111\u1ea1o c\u1ee7a ion Li trong LiFePO4; (b) s\u1ef1 di chuy\u1ec3n c\u1ee7a c\u00e1c ion Li gi\u1eefa c\u00e1c k\u00eanh th\u00f4ng qua c\u00e1c khuy\u1ebft t\u1eadt chi\u1ebfm gi\u1eef l\u1eabn nhau Li \/ Fe<\/div>\n

M\u00f4 h\u00ecnh tr\u01b0\u1eddng pha<\/h2>\n
Ph\u01b0\u01a1ng ph\u00e1p tr\u01b0\u1eddng pha d\u1ef1a tr\u00ean l\u00fd thuy\u1ebft Ginzburg-Landau. Ph\u01b0\u01a1ng tr\u00ecnh vi ph\u00e2n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 bi\u1ec3u di\u1ec5n s\u1ef1 khu\u1ebfch t\u00e1n, th\u1ebf \u0111\u1eb7t h\u00e0ng v\u00e0 truy\u1ec1n \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc c\u1ee7a m\u1ed9t c\u01a1 ch\u1ebf v\u1eadt l\u00fd c\u1ee5 th\u1ec3. C\u00e1c ph\u01b0\u01a1ng tr\u00ecnh tr\u00ean \u0111\u01b0\u1ee3c gi\u1ea3i b\u1eb1ng l\u1eadp tr\u00ecnh m\u00e1y t\u00ednh. Nghi\u00ean c\u1ee9u tr\u1ea1ng th\u00e1i t\u1ee9c th\u1eddi c\u1ee7a h\u1ec7 theo th\u1eddi gian v\u00e0 kh\u00f4ng gian. M\u00f4 h\u00ecnh tr\u01b0\u1eddng pha d\u1ef1a tr\u00ean c\u00e1c nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n c\u1ee7a nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc v\u00e0 \u0111\u1ed9ng l\u1ef1c h\u1ecdc v\u00e0 l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n s\u1ef1 ti\u1ebfn h\u00f3a c\u1ee7a c\u00e1c vi c\u1ea5u tr\u00fac trong qu\u00e1 tr\u00ecnh chuy\u1ec3n pha \u1edf tr\u1ea1ng th\u00e1i r\u1eafn.<\/div>\n
M\u00f4 h\u00ecnh tr\u01b0\u1eddng pha c\u00f3 th\u1ec3 m\u00f4 ph\u1ecfng s\u1ef1 ph\u00e1t tri\u1ec3n tinh th\u1ec3, chuy\u1ec3n pha r\u1eafn, s\u1ef1 ti\u1ebfn h\u00f3a v\u1ebft n\u1ee9t, chuy\u1ec3n pha m\u00e0ng, di chuy\u1ec3n ion t\u1ea1i b\u1ec1 m\u1eb7t ph\u00e2n c\u00e1ch, v.v., nh\u01b0ng k\u1ebft qu\u1ea3 m\u00f4 ph\u1ecfng thi\u1ebfu so s\u00e1nh \u0111\u1ecbnh l\u01b0\u1ee3ng v\u1edbi th\u1eddi gian quan s\u00e1t. \u0110\u1ed9 d\u00e0y giao di\u1ec7n th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1edbn h\u01a1n so v\u1edbi t\u00ecnh h\u00ecnh th\u1ef1c t\u1ebf. , d\u1eabn \u0111\u1ebfn vi\u1ec7c thi\u1ebfu c\u00e1c chi ti\u1ebft. Marnix Wagemaker (T\u00e1c gi\u1ea3 t\u01b0\u01a1ng \u1ee9ng) c\u1ee7a \u0110\u1ea1i h\u1ecdc C\u00f4ng ngh\u1ec7 Delft \u1edf H\u00e0 Lan \u0111\u00e3 xu\u1ea5t b\u1ea3n m\u1ed9t b\u00e0i b\u00e1o tr\u00ean t\u1ea1p ch\u00ed Adv.Funct.Mater. v\u00e0o n\u0103m 2018 \u0111\u1ec3 \u0111\u1ec1 xu\u1ea5t m\u00f4 h\u00ecnh tr\u01b0\u1eddng pha nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc \u0111\u1ec3 ch\u00e8n ion lithium v\u00e0o spinel Li4Ti5O12, t\u00edch h\u1ee3p d\u1eef li\u1ec7u DFT. Kh\u1ea3 n\u0103ng m\u00f4 t\u1ea3 h\u00e0nh vi nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc ho\u00e0n ch\u1ec9nh c\u1ee7a c\u00e1c h\u1ea1t ph\u00e2n t\u00e1ch pha cung c\u1ea5p m\u1ed9t h\u01b0\u1edbng c\u1ee5 th\u1ec3 \u0111\u1ec3 thi\u1ebft k\u1ebf \u0111i\u1ec7n c\u1ef1c Li4Ti5O12 hi\u1ec7u su\u1ea5t t\u1ed1t nh\u1ea5t.<\/div>\n

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H\u00ecnh 3: M\u00f4 ph\u1ecfng \u0111\u01a1n h\u1ea1t LTO, m\u1ed1i quan h\u1ec7 gi\u1eefa dung l\u01b0\u1ee3ng pin v\u00e0 dung l\u01b0\u1ee3ng ph\u00f3ng \u0111i\u1ec7n danh \u0111\u1ecbnh v\u00e0 \u0111\u1ed9 d\u00e0y \u0111i\u1ec7n c\u1ef1c trong m\u00f4 ph\u1ecfng \u0111i\u1ec7n c\u1ef1c x\u1ed1p<\/div>\n

Ph\u01b0\u01a1ng ph\u00e1p ph\u1ea7n t\u1eed h\u1eefu h\u1ea1n<\/h2>\n
Ph\u01b0\u01a1ng ph\u00e1p ph\u1ea7n t\u1eed h\u1eefu h\u1ea1n l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt s\u1ed1 \u0111\u1ec3 gi\u1ea3i c\u00e1c nghi\u1ec7m g\u1ea7n \u0111\u00fang c\u1ee7a b\u00e0i to\u00e1n gi\u00e1 tr\u1ecb bi\u00ean c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh \u0111\u1ea1o h\u00e0m ri\u00eang. Lu\u1ed3ng c\u1ee7a m\u00f4 ph\u1ecfng ph\u01b0\u01a1ng ph\u00e1p ph\u1ea7n t\u1eed h\u1eefu h\u1ea1n nh\u01b0 sau: 1. T\u00ednh r\u1eddi r\u1ea1c c\u1ee7a v\u00f9ng b\u00e0i to\u00e1n gi\u1ea3i 2. X\u00e1c \u0111\u1ecbnh bi\u1ebfn tr\u1ea1ng th\u00e1i v\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u khi\u1ec3n bi\u1ebfn c\u1ee7a v\u00f9ng, t\u1ee9c l\u00e0 ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfn h\u00f3a c\u1ee7a bi\u1ebfn kh\u00f4ng gian th\u1eddi gian; 3. Suy ra \u0111\u01a1n v\u1ecb, t\u1eadp h\u1ee3p \u0111\u01a1n v\u1ecb Gi\u1ea3i t\u1ed5ng th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i, cu\u1ed1i c\u00f9ng gi\u1ea3i c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh \u0111\u1ed3ng th\u1eddi v\u00e0 thu \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3.<\/div>\n
In order to better understand the overheating behavior of large-capacity and high-power lithium-ion batteries for electric vehicles, Cao Binggang of Xi’an Jiaotong University used finite element method to simulate the internal temperature of the battery during consideration of internal resistance, convection and external dissipation. The spatial distribution, the temperature distribution simulation results of the test cell in a 155 \u00b0C hot furnace and the battery composition of VLP50\/62\/100S-Fe (3.2 V\/55 A\u00b7h) LiFePO4\/graphite.<\/div>\n

\"\"<\/p>\n

H\u00ecnh 4: Ph\u00e2n b\u1ed1 m\u00f4 ph\u1ecfng ph\u1ea7n t\u1eed h\u1eefu h\u1ea1n trong \u00f4 \u1edf 155 \u00b0 C, 1200 gi\u00e2y v\u00e0 3600 gi\u00e2y<\/div>\n
M\u00f4 ph\u1ecfng v\u1eadt li\u1ec7u v\u0129 m\u00f4 nh\u01b0 m\u00f4 h\u00ecnh tr\u01b0\u1eddng pha v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ph\u1ea7n t\u1eed h\u1eefu h\u1ea1n t\u1eadp trung v\u00e0o c\u00e1c v\u1ea5n \u0111\u1ec1 k\u1ef9 thu\u1eadt v\u00e0 gi\u00fap hi\u1ec3u c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng v\u0129 m\u00f4 nh\u01b0 \u1ee9ng su\u1ea5t, truy\u1ec1n nhi\u1ec7t, d\u00f2ng ch\u1ea3y v\u00e0 kh\u1edbp n\u1ed1i \u0111a tr\u01b0\u1eddng trong pin lithium-ion. Vi\u1ec7c t\u00ednh to\u00e1n nguy\u00ean t\u1eafc \u0111\u1ea7u ti\u00ean d\u1ef1a tr\u00ean l\u00fd thuy\u1ebft h\u00e0m m\u1eadt \u0111\u1ed9 c\u00f3 l\u1ee3i h\u01a1n cho c\u00e1c \u0111\u1eb7c t\u00ednh vi v\u1eadt l\u00fd nh\u01b0 n\u0103ng l\u01b0\u1ee3ng v\u00e0 c\u1ea5u tr\u00fac \u0111i\u1ec7n t\u1eed c\u1ee7a h\u1ec7 v\u1eadt ch\u1ea5t.<\/div>\n
V\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a l\u00fd thuy\u1ebft v\u00e0 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i c\u1ee7a m\u00f4 ph\u1ecfng m\u00e1y t\u00ednh, khoa h\u1ecdc v\u1eadt li\u1ec7u t\u00ednh to\u00e1n s\u1ebd d\u1eabn \u0111\u1ea7u v\u00e0 x\u00e1c minh khoa h\u1ecdc v\u1eadt li\u1ec7u th\u1ef1c nghi\u1ec7m. Vi\u1ec7c t\u00ednh to\u00e1n t\u1eeb quy m\u00f4 v\u0129 m\u00f4 \u0111\u1ebfn l\u00fd thuy\u1ebft vi m\u00f4 s\u1ebd th\u00fac \u0111\u1ea9y r\u1ea5t nhi\u1ec1u s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a l\u0129nh v\u1ef1c v\u1eadt li\u1ec7u, \u0111\u1ed1i v\u1edbi pin lithium-ion. V\u1ec1 nhi\u1ec1u v\u1ea5n \u0111\u1ec1 trong khoa h\u1ecdc th\u1ef1c nghi\u1ec7m, v\u1edbi s\u1ef1 tr\u1ee3 gi\u00fap c\u1ee7a c\u00e1c m\u00f4 ph\u1ecfng t\u00ednh to\u00e1n, n\u00f3 c\u0169ng s\u1ebd l\u00e0 m\u1ed9t l\u1eddi gi\u1ea3i th\u00edch l\u00fd thuy\u1ebft r\u00f5 r\u00e0ng. S\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p m\u00f4 ph\u1ecfng t\u00ednh to\u00e1n cho pin lithium-ion s\u1ebd th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n v\u00e0 \u1ee9ng d\u1ee5ng v\u1eadt li\u1ec7u pin lithium-ion.<\/div>\n
T\u00e0i li\u1ec7u tham kh\u1ea3o:<\/div>\n
[1] Huang Jie, Ling Shigang, Wang Xuelong, et al. B\u00e0i to\u00e1n Khoa h\u1ecdc c\u01a1 b\u1ea3n v\u1ec1 Pin Lithium Ion (XIV) \u2014\u2014 Ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n [J]. Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 L\u01b0u tr\u1eef N\u0103ng l\u01b0\u1ee3ng, 2015, 4 (2): 215-230.<\/div>\n
[2] Ji Xiang, Song Yicheng, Zhang Jungan. M\u00f4 ph\u1ecfng \u0111\u1ed9ng l\u1ef1c h\u1ecdc ph\u00e2n t\u1eed c\u1ee7a t\u00ednh ch\u1ea5t khu\u1ebfch t\u00e1n c\u1ee7a Li_xC_6 trong pin Lithium Ion [J]. T\u1ea1p ch\u00ed \u0110\u1ea1i h\u1ecdc Th\u01b0\u1ee3ng H\u1ea3i (Khoa h\u1ecdc T\u1ef1 nhi\u00ean), 2014 (1): 68-74.<\/div>\n
[3] Shi Siqi (Sisi Qi). Nghi\u00ean c\u1ee9u nguy\u00ean t\u1eafc \u0111\u1ea7u ti\u00ean v\u1ec1 v\u1eadt li\u1ec7u cat\u1ed1t cho pin lithium-ion [D]. B\u1eafc Kinh: Vi\u1ec7n V\u1eadt l\u00fd H\u1ecdc vi\u1ec7n Khoa h\u1ecdc Trung Qu\u1ed1c, 2004. [4] Yang JJ \uff0c Tse J S. C\u01a1 ch\u1ebf khu\u1ebfch t\u00e1n ion Li trong LiFePO4 \uff1a M\u1ed9t nghi\u00ean c\u1ee9u \u0111\u1ed9ng h\u1ecdc ph\u00e2n t\u1eed abinitio [J]. J. V\u1eadt l\u00fd. Ch\u00e8m. A \uff0c 2011\uff0c115 \uff0845\uff09 \uff1a 13045-13049.<\/div>\n
[5] Vasileiadis A, Klerk NJJD, Smith RB, v\u00e0 c\u1ed9ng s\u1ef1. H\u01b0\u1edbng t\u1edbi Hi\u1ec7u su\u1ea5t T\u1ed1i \u01b0u v\u00e0 Hi\u1ec3u bi\u1ebft S\u00e2u s\u1eafc v\u1ec1 \u0110i\u1ec7n c\u1ef1c Spinel Li4Ti5O12 th\u00f4ng qua M\u00f4 h\u00ecnh Tr\u01b0\u1eddng Pha [J]. V\u1eadt li\u1ec7u ch\u1ee9c n\u0103ng n\u00e2ng cao, 2018.<\/div>\n
[6] Herzmann C, G\u00fcnther G, Eker B, et al. M\u00f4 h\u00ecnh ph\u1ea7n t\u1eed h\u1eefu h\u1ea1n nhi\u1ec7t ba chi\u1ec1u c\u1ee7a pin lithium-ion trong \u1ee9ng d\u1ee5ng l\u1ea1m d\u1ee5ng nhi\u1ec7t [J]. T\u1ea1p ch\u00ed Ngu\u1ed3n \u0111i\u1ec7n, 2010, 195 (8): 2393-2398.<\/div>\n<\/div>\n<\/div>\n

<\/p>","protected":false},"excerpt":{"rendered":"

In recent decades, lithium-ion batteries have attracted attention in the field of energy materials. At the same time, with the development of basic theory and computer field, many computational simulation methods have been applied in the research of lithium-ion batteries. Due to errors in the experimental process, microscopic scales, such as the growth mechanism of…<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[79],"tags":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/1804"}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/comments?post=1804"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/1804\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=1804"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=1804"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=1804"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}