Polyimide-cellulose interaction in Sb anode enables fast charging lithium-ion battery application
Related Research Unit(s)
|Journal / Publication||Materials Today Energy|
|Online published||23 Jun 2018|
|Publication status||Published - Sep 2018|
|Link to Scopus||https://www.scopus.com/record/display.uri?eid=2-s2.0-85048711868&origin=recordpage|
Antimony-based electrodes are promising as fast charging anodes for lithium-ion batteries because their operating potential is about 0.8 V vs. Li/Li+, far away from the plating potential of Li. However, their capacity decays fast due to large volume expansion, the issue which has often been addressed through the use of nano-sized materials. Herein, we utilize an ion-dipole interaction between polyimide and carboxymethyl cellulose which suppresses particle cracking and holds the particle together to enable antimony anodes utilizing micron-sized Sb particles for high rate applications. Sb anode with 9.4% polyimide coating exhibits a high reversible capacity of 580 mAh g−1 at 1 A g−1 with excellent cycle performance. The rate performance of the electrode can be further improved by adding 5% acetylene black during the polyimide coating process. Even at a current rate of 20 C (13.2 A g−1), a highly reversible capacity of 380 mAh g−1 can be obtained. The superior high-rate capability and excellent stability of Sb anodes are further verified by full-cell tests with LiFePO4 cathodes.
- Fast charging, Ion-dipole interaction, Lithium-ion battery, Polyimide coating, Sb anode
Materials Today Energy, Vol. 9, 09.2018, p. 295-302.
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal