Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6471552 | Electrochimica Acta | 2017 | 9 Pages |
Abstract
Lithium ion capacitor (LIC) is one of the most promising electrochemical energy storage devices, which offers rapid charging-discharging capability and long cycle life. We have fabricated LIC pouch cells using an electrochemically-driven lithium pre-doping method through a three-electrode pouch cell structure. The active materials of cathode and anode of LIC cell are activated carbon and pre-lithiated hard carbon, respectively. The electrochemical performances and the capacity fading behaviors of LICs in the voltage range of 2.0 â 4.0 V have been studied. The specific energy and specific power reach 73.6 Wh kgâ1 and 11.9 kW kgâ1 based on the weight of the active materials in both cathode and anode, respectively. Since the cycling performance is actually determined by hard carbon anode, the anode potential swings are emphasized. The capacity fading of LIC upon cycling is proposed to be caused by the increases of internal resistance and the consumption of lithium stored in anode. Finally, a large-capacity LIC pouch cell has been assembled with a maximum specific energy of 18.1 Wh kgâ1 and a maximum specific power of 3.7 kW kgâ1 based on the weight of the whole cell.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Xianzhong Sun, Xiong Zhang, Wenjie Liu, Kai Wang, Chen Li, Zhao Li, Yanwei Ma,