Abstract
Artificial graphite (FSN) additive is employed as internal structural label for projecting cyclability of Si material native electrode in a mass ratio of Si/FSN = 1.0 in Li ion battery (LIB). Results of operando X-ray diffraction analysis on Si-FSN negative electrode in LIB demonstrate that one can evaluate the lithiation and delithiation affinity of active material by referring phase transition delay of graphite as affected by experimental splits in a formation process of LIB. We prove that a thin layer of surface amorphous structure and residual lattice strain are formed in Si by high energy ball-milling treatment. Those manipulations improve Li intercalation kinetics and thus enabling a capacity fading of less than 10% (from 1860 to 1650 mAhg−1) for Si negative electrode in 50 cycles. Of utmost importance, this study discloses a robust assessment for revealing mechanism on amorphous and strain related silicide formation and predicting cyclability of negative electrode by quantitative phase evolution rate of FSN additive in LIB.
| Original language | English |
|---|---|
| Article number | 1299 |
| Journal | Scientific reports |
| Volume | 9 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2019 Dec 1 |
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Cyclability evaluation on Si based Negative Electrode in Lithium ion Battery by Graphite Phase Evolution : an operando X-ray diffraction study. / Hu, Chih Wei; Chou, Jyh Pin; Hou, Shang Chieh; Hu, Alice; Su, Yu Fan; Chen, Tsan Yao; Liew, Wing Keong; Liao, Yen Fa; Huang, Jow-Lay; Chen, Jin Ming; Chang, Chia Chin.
In: Scientific reports, Vol. 9, No. 1, 1299, 01.12.2019.Research output: Contribution to journal › Article
TY - JOUR
T1 - Cyclability evaluation on Si based Negative Electrode in Lithium ion Battery by Graphite Phase Evolution
T2 - an operando X-ray diffraction study
AU - Hu, Chih Wei
AU - Chou, Jyh Pin
AU - Hou, Shang Chieh
AU - Hu, Alice
AU - Su, Yu Fan
AU - Chen, Tsan Yao
AU - Liew, Wing Keong
AU - Liao, Yen Fa
AU - Huang, Jow-Lay
AU - Chen, Jin Ming
AU - Chang, Chia Chin
PY - 2019/12/1
Y1 - 2019/12/1
N2 - Artificial graphite (FSN) additive is employed as internal structural label for projecting cyclability of Si material native electrode in a mass ratio of Si/FSN = 1.0 in Li ion battery (LIB). Results of operando X-ray diffraction analysis on Si-FSN negative electrode in LIB demonstrate that one can evaluate the lithiation and delithiation affinity of active material by referring phase transition delay of graphite as affected by experimental splits in a formation process of LIB. We prove that a thin layer of surface amorphous structure and residual lattice strain are formed in Si by high energy ball-milling treatment. Those manipulations improve Li intercalation kinetics and thus enabling a capacity fading of less than 10% (from 1860 to 1650 mAhg−1) for Si negative electrode in 50 cycles. Of utmost importance, this study discloses a robust assessment for revealing mechanism on amorphous and strain related silicide formation and predicting cyclability of negative electrode by quantitative phase evolution rate of FSN additive in LIB.
AB - Artificial graphite (FSN) additive is employed as internal structural label for projecting cyclability of Si material native electrode in a mass ratio of Si/FSN = 1.0 in Li ion battery (LIB). Results of operando X-ray diffraction analysis on Si-FSN negative electrode in LIB demonstrate that one can evaluate the lithiation and delithiation affinity of active material by referring phase transition delay of graphite as affected by experimental splits in a formation process of LIB. We prove that a thin layer of surface amorphous structure and residual lattice strain are formed in Si by high energy ball-milling treatment. Those manipulations improve Li intercalation kinetics and thus enabling a capacity fading of less than 10% (from 1860 to 1650 mAhg−1) for Si negative electrode in 50 cycles. Of utmost importance, this study discloses a robust assessment for revealing mechanism on amorphous and strain related silicide formation and predicting cyclability of negative electrode by quantitative phase evolution rate of FSN additive in LIB.
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U2 - 10.1038/s41598-018-38112-2
DO - 10.1038/s41598-018-38112-2
M3 - Article
VL - 9
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
IS - 1
M1 - 1299
ER -