期刊
ACS APPLIED ENERGY MATERIALS
卷 3, 期 10, 页码 9989-10000出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.0c01679
关键词
lithium-ion battery; fluoroethylene carbonate; solid electrolyte interphase; electrolyte; decomposition mechanism
资金
- Key-Area Research and Development Program of Guangdong Province [2020B090919001, 2019B090908001]
- National Natural Science Foundation of China [21802045]
- Guangdong Provincial Key Laboratory of Energy Materials for Electric Power [2018B030322001]
- Shenzhen Key Laboratory of Solid State Batteries [ZDSYS201802081843465]
LiNi0.8Mn0.1Co0.1O2 parallel to SiOx@ graphite has received great attention in both academia and industry because it has the highest energy density among state-of-the-art commercial lithium-ion batteries. However, it suffers from severe capacity decay during high-temperature cycling or storage, which still needs to be addressed for its commercialization. In this work, fluoroethylene carbonate (FEC) is employed as an additive or a cosolvent to improve the high-temperature performance of 1 Ah LiNi0.8Mn0.1Co0.1O2 parallel to SiOx@ graphite pouch cells. By adding 5% FEC as additive, the capacity retention increases from 54.5% to 67.0% after 100 cycles at 45 degrees C. The use of FEC as a cosolvent further increases the capacity retention to 83.3%. The improvement is ascribed to the multifunctional effects from FEC, preventing electrolyte decomposition, mitigating the resistance increment and Mn ions dissolution with the formation of the interface films, which consist of LiF and LiPOxFy species. Therefore, the employment of FEC is of great importance for the development of high-energy-density lithium-ion batteries.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据