Reversible and irreversible heat generation of NCA/Si–C pouch cell during electrochemical energy-storage process

• 作者: Chuan Wu Guanghai Chen Hongyue Cui Hongyun Ma Huichun Zhao Jiang Zhou Limin Li Xinquan Wang Ying Bai Yu Li Zhaohua Wang
• 来源期刊: 能源化学
• 年，卷（期）: 2019,（2）
• 页码范围: 95-102
• 页数: 8页
• 语种: 英文

摘要

To meet the requirements of electronic vehicles (EVs) and hybrid electric vehicles (HEVs), the high en- ergy density LiNi 0.8 Co 0.15 Al0.05 O 2 (NCA) cathode and Si–C anode have attracted more attention. Here we report the thermal behaviors of NCA/Si–C pouch cell during the charge/discharge processes at different current densities. The total heat generations are derived from the surface temperature change during electrochemical Li + insertion/extraction in adiabatic surrounding. The reversible heat is determined by the entropic coefficients, which are related with open-circuit voltage at different tem peratures; while the irreversible heat is determined by the internal resistance, which can be obtained via V –I characteris- tic, electrochemical impedance spectroscopy and hybrid pulse power characterization (HPPC). During the electrochemical process, the reversible heat contributes less than 10％ to total heat generation; and the heat generated in charge process is less than that in discharge process. The results of thermal behav- iors analyses are conducive to understanding the safety management and paving the way for building a reliable thermal model of high energy density lithium ion battery.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	Ying Bai		1	0	0.0	0.0
2	Limin Li		1	0	0.0	0.0
3	Yu Li		1	0	0.0	0.0
4	Guanghai Chen		1	0	0.0	0.0
5	Huichun Zhao		1	0	0.0	0.0
6	Zhaohua Wang		1	0	0.0	0.0
7	Chuan Wu		1	0	0.0	0.0
8	Hongyun Ma		1	0	0.0	0.0
9	Xinquan Wang		1	0	0.0	0.0
10	Hongyue Cui		1	0	0.0	0.0
11	Jiang Zhou		1	0	0.0	0.0