Improved high-temperature performance of LiNi0.5Co0.2Mn0.3O2/artificial graphite lithium ion pouch cells by difluoroethylene carbonate

Hu，Shiguang1,2; Zhao，Huajun3; Qian，Yunxian2; Xiang，Shuhuai2; Zhang，Guangzhao3; Huang，Wei4; Luo，Guangfu3; Wang，Jun3; Deng，Yonghong3; Wang，Chaoyang1

2023

10.1016/j.est.2022.106266

Journal of Energy Storage   影响因子和分区

2352-152X

2352-152X

A key issue in the development of lithium ion batteries (LIBs) is the stability of the electrolyte, especially at high temperature. This research compares three electrolyte solvents with different cyclic carbonate structures, i.e. ethylene carbonate (EC), fluoroethylene carbonate (FEC) and difluoroethylene carbonate (DFEC) to investigate their effect on the performance of LiNiCoMnO/artificial graphite lithium ion pouch cells at high temperature. The results point out that DFEC is the most effective solvent in preventing interfacial impedance growth and electrolyte decomposition, and improving cycling performance, with capacity retention of 85 % after cycling 500 times at 45 °C. Comprehensive characterizations reveal that DFEC forms effective interphases with high thermal stability on both cathode and anode. This work highlights the important role of DFEC in electrolyte formulations for high−energy−density LIBs at elevated temperature.

Fluorinated carbonates High−voltage electrolytes Lithium ion batteries Solid electrolyte interphase

SCI ; EI

英语

通讯

Science and Technology Planning Project of Guangdong Province[2021A0505110001];National Natural Science Foundation of China[22078144];

Energy & Fuels

Energy & Fuels

WOS:000901824100009

ELSEVIER

20225113268906

Carbonation ; Electrodes ; Ethylene ; Graphite ; Ions ; Solid electrolytes

Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Organic Compounds:804.1

2-s2.0-85144091185

Scopus

1.Research Institute of Materials Science,South China University of Technology,Guangzhou,510640,China
2.Shenzhen CAPCHEM Technology Co. Ltd,Shenzhen,518118,China
3.Key University Laboratory of Highly Efficient Utilization of Solar Energy and Sustainable Development of Guangdong,Department of Materials Science & Engineering,School of Innovation and Entrepreneurship,Southern University of Science and Technology,Shenzhen,518055,China
4.ISME Department of CoB,National Center for Applied Mathematics Shenzhen (NCAMS−Digital Economy),Southern University of Science and Technology,Shenzhen,518055,China

Hu，Shiguang,Zhao，Huajun,Qian，Yunxian,et al. Improved high-temperature performance of LiNi0.5Co0.2Mn0.3O2/artificial graphite lithium ion pouch cells by difluoroethylene carbonate[J]. Journal of Energy Storage,2023,57.

Hu，Shiguang.,Zhao，Huajun.,Qian，Yunxian.,Xiang，Shuhuai.,Zhang，Guangzhao.,...&Wang，Chaoyang.(2023).Improved high-temperature performance of LiNi0.5Co0.2Mn0.3O2/artificial graphite lithium ion pouch cells by difluoroethylene carbonate.Journal of Energy Storage,57.

Hu，Shiguang,et al."Improved high-temperature performance of LiNi0.5Co0.2Mn0.3O2/artificial graphite lithium ion pouch cells by difluoroethylene carbonate".Journal of Energy Storage 57(2023).