New insight into the mechanism of LiPO2F2 on the interface of high-voltage cathode LiNi0.5Mn1.5O4 with truncated octahedral structure

doi:10.1016/j.apsusc.2019.06.146

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 盐湖资源与化学实验室

	New insight into the mechanism of LiPO2F2 on the interface of high-voltage cathode LiNi0.5Mn1.5O4 with truncated octahedral structure
	Zhao, Dongni; Song, Sainan; Ye, Xiushen; Wang, Peng; Wang, Jie; Wei, Yuan; Li, Chunlei; Mao, Liping; Zhang, Haiming; Li, Shiyou
刊名	APPLIED SURFACE SCIENCE
	2019-10-15
卷号	491 页码:595-606
ISSN号	0169-4332
DOI	10.1016/j.apsusc.2019.06.146
英文摘要	The development of high energy density material is of great importance and urgency for new generation of energy storage system. However, electrolyte formula for high voltage system remains a challenge. The use of various functional additives gives rise to the complexity of electrolyte system and hinders completely understanding of the action mechanism of additives. Herein, we report the adaptability and mechanism of a single additive LiPO2F2 added in the conventional LiPF6-based electrolyte system. The resulting conclusion displays a notable improvement in the cycling stability for 5 V-class cathode LiNi0.5Mn1.5O4, the capacity retention increase from 85.76% to 95.92%. It is comforting that the rate performance is not reduced due to the increase in cycle stability, and it also shows good advantages in terms of high rate and reversibility. Meanwhile, detailed analysis about interface mechanism for LiPO2F2 by the surface testing (SEM, TEM and XPS) give the direct characterizations. Common ion effect of the decomposition product Li3PO4 from additive is probed from the above characterization and combined with DFT calculations and some clever experiments to prove the positive effect of additives. The findings obtained from this work may provide a useful guidance for the research on electrolyte formulation for high voltage system.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34115]
专题	青海盐湖研究所_盐湖资源与化学实验室中国科学院青海盐湖研究所
推荐引用方式 GB/T 7714	Zhao, Dongni,Song, Sainan,Ye, Xiushen,et al. New insight into the mechanism of LiPO2F2 on the interface of high-voltage cathode LiNi0.5Mn1.5O4 with truncated octahedral structure[J]. APPLIED SURFACE SCIENCE,2019,491:595-606.
APA	Zhao, Dongni.,Song, Sainan.,Ye, Xiushen.,Wang, Peng.,Wang, Jie.,...&Li, Shiyou.(2019).New insight into the mechanism of LiPO2F2 on the interface of high-voltage cathode LiNi0.5Mn1.5O4 with truncated octahedral structure.APPLIED SURFACE SCIENCE,491,595-606.
MLA	Zhao, Dongni,et al."New insight into the mechanism of LiPO2F2 on the interface of high-voltage cathode LiNi0.5Mn1.5O4 with truncated octahedral structure".APPLIED SURFACE SCIENCE 491(2019):595-606.