A new additive 3-Isocyanatopropyltriethoxysilane to improve electrochemical performance of Li/NCM622 half-cell at high voltage

doi:10.1016/j.jpowsour.2019.03.046

	A new additive 3-Isocyanatopropyltriethoxysilane to improve electrochemical performance of Li/NCM622 half-cell at high voltage
	Wang, SL; Chen, SM; Gao, WQ; Liu, LL; Zhang, SJ; Wang, Shili; Chen, Shimou; Gao, Weiqun; Liu, Lili; Zhang, Suojiang
刊名	JOURNAL OF POWER SOURCES
	2019
卷号	423 页码:90
关键词	Lithium ion batteries LITHIUM-ION BATTERIES Electrolyte LINI0.6CO0.2MN0.2O2 CATHODE High-voltage ELECTROLYTE Interface OXIDE Additives BORATE STABILITY CHEMISTRY STORAGE SPINEL ANODE
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2019.03.046
文献子类	Article
英文摘要	In this paper, we propose a new electrolyte additive 3-Isocyanatopropyltriethoxysilane (IPTS) to improve the cycle stability and rate performance of Ni-Rich (LiNi0.6Co0.2Mn0.2O2) cathode half-cell. Density function theory calculations suggest that IPTS has higher HOMO energy than solvent, which can decompose preferentially. Moreover, we confirm the oxidative decomposition by the linear scanning cyclic voltammetry, which can achieve stable at a cutoff voltage of 2.5-4.5 Vs. (Li/Li+). The cyclic voltammetry curves at different scan rates indicate that the migration rate of lithium ions is higher in the cells with 0.5% additive than in the base electrolyte. After 150 cycles, the capacity retention rates in the base electrolyte and in the additive-containing electrolyte are 55.4% and 73.1%, respectively. X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy show that the additive is involved in film formation, and the obtained CEI film is very uniform and dense, which play a key role in stabilizing the electrolyte under high voltage.
WOS记录号	WOS:000466453700012
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/28186]
专题	中国科学院过程工程研究所
推荐引用方式 GB/T 7714	Wang, SL,Chen, SM,Gao, WQ,et al. A new additive 3-Isocyanatopropyltriethoxysilane to improve electrochemical performance of Li/NCM622 half-cell at high voltage[J]. JOURNAL OF POWER SOURCES,2019,423:90, 97.
APA	Wang, SL.,Chen, SM.,Gao, WQ.,Liu, LL.,Zhang, SJ.,...&Zhang, Suojiang.(2019).A new additive 3-Isocyanatopropyltriethoxysilane to improve electrochemical performance of Li/NCM622 half-cell at high voltage.JOURNAL OF POWER SOURCES,423,90.
MLA	Wang, SL,et al."A new additive 3-Isocyanatopropyltriethoxysilane to improve electrochemical performance of Li/NCM622 half-cell at high voltage".JOURNAL OF POWER SOURCES 423(2019):90.