Mitigating Voltage Decay of Li-Rich Cathode Material via Increasing Ni Content for Lithium-Ion Batteries

CORC > 化学研究所 > 中国科学院化学研究所 > 分子纳米结构与纳米技术实验室

	Mitigating Voltage Decay of Li-Rich Cathode Material via Increasing Ni Content for Lithium-Ion Batteries
	Shi, Ji-Lei 1,3; Zhang, Jie-Nan 2; He, Min 2; Zhang, Xu-Dong 1,3; Yin, Ya-Xia 1; Li, Hong 2; Guo, Yu-Guo 1,3; Gu, Lin 2; Wan, Li-Jun 1,3
刊名	ACS APPLIED MATERIALS & INTERFACES
	2016-08-10
卷号	8 期号:31 页码:20139-20147
关键词	lithium batteries cathode materials high-capacity Li-rich voltage decay
英文摘要	Li-rich layered materials have been considered as the most promising cathode materials for future high-energy-density lithium-ion batteries. However, they suffer from severe voltage decay upon cycling, which hinders their further commercialization. Here, we report a Li-rich layered material 0.5Li(2)MnO(3)center dot 0.5LiNi(0.8)-Co0.1Mn0.1O2 with high nickel content, which exhibits much slower voltage decay during long-term cycling compared to conventional Li-rich materials. The voltage decay after 200 cycles is 201 mV. Combining in situ X-ray diffraction (XRD), ex situ XRD, ex situ Xray photoelectron spectroscopy, and scanning transmission electron microscopy, we demonstrate that nickel ions act as stabilizing ions to inhibit the Jahnn-Teller effect of active Mn3+ ions, improving d-p hybridization and supporting the layered structure as a pillar. In addition, nickel ions can migrate between the transition-metal layer and the interlayer, thus avoiding the formation of spinel-like structures and consequently mitigating the voltage decay. Our results provide a simple and effective avenue for developing Li-rich layered materials with mitigated voltage decay and a long lifespan, thereby promoting their further application in lithium-ion batteries with high energy density.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/35276]
专题	化学研究所_分子纳米结构与纳米技术实验室
作者单位	1.Chinese Acad Sci, Inst Chem, CAS Key Lab Mol Nanostruct & Nanotechnol, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Shi, Ji-Lei,Zhang, Jie-Nan,He, Min,et al. Mitigating Voltage Decay of Li-Rich Cathode Material via Increasing Ni Content for Lithium-Ion Batteries[J]. ACS APPLIED MATERIALS & INTERFACES,2016,8(31):20139-20147.
APA	Shi, Ji-Lei.,Zhang, Jie-Nan.,He, Min.,Zhang, Xu-Dong.,Yin, Ya-Xia.,...&Wan, Li-Jun.(2016).Mitigating Voltage Decay of Li-Rich Cathode Material via Increasing Ni Content for Lithium-Ion Batteries.ACS APPLIED MATERIALS & INTERFACES,8(31),20139-20147.
MLA	Shi, Ji-Lei,et al."Mitigating Voltage Decay of Li-Rich Cathode Material via Increasing Ni Content for Lithium-Ion Batteries".ACS APPLIED MATERIALS & INTERFACES 8.31(2016):20139-20147.