Comparative study of simple and concentration gradient shell coatings with Li1.2Ni0.13Mn0.54Co0.13O2 on LiNi0.8Mn0.1Co0.1O2 cathodes for lithium-ion batteries

doi:10.1016/j.ssi.2019.115034

	Comparative study of simple and concentration gradient shell coatings with Li1.2Ni0.13Mn0.54Co0.13O2 on LiNi0.8Mn0.1Co0.1O2 cathodes for lithium-ion batteries
	Ma, Fei 2,3; Wu, Yinghong 2,3; Wei, Guangye 2; Qiu, Shufeng 1; Qu, Jingkui 2; Qi, Tao 2
刊名	SOLID STATE IONICS
	2019-11-05
卷号	341 页码:10
关键词	Li- and Mn-rich materials Concentration gradient Ni-rich materials Core-shell Lithium-ion battery
ISSN号	0167-2738
DOI	10.1016/j.ssi.2019.115034
英文摘要	Li- and Mn-rich materials have high capacities but serious voltage attenuation, whereas Ni-rich materials LiNi0.8Co0.1Mn0.1O2 (NCM) have good rate characteristics but poor stabilities, and they readily to oxidize organic electrolytes. The core-shell strategy with Ni-rich materials as the core and Li- and Mn-rich materials as the shell was expected to balance these merits and drawbacks. In this work, simple and concentration-gradient Li- and Mn-rich shell were successfully synthesized on NCM and critically compared. As expected, a distinct core-shell interface was observed for the simple core-shell cathode, which causes the shell to crack during cycling and exhibits worse electrochemical performance than the single Li- and Mn-rich cathodes and Ni-rich cathodes. In contrast, the fabricated concentration-gradient core-shell cathode shows the uniform fusion of the core and shell at the atomic level, and the overall electrochemical performance is far superior to that of the simple core-shell and pristine cathodes. In addition, it delivers an initial reversible capacity of 226.6 mAh g(-1) at a C-rate of 0.1C and 120.2 mAh g(-1) at 10.0C, and it retains 86.9% of its capacity after 100 cycles to 4.6 V at 1.0C. Differential capacity versus potential (dQ/dV versus V) and EIS analyses show that the concentration-gradient core-shell cathode has a stable impedance and very stable average voltage. Obviously, the concentration-gradient coating of the Li- and Mn-rich shell can maximize the merits of the core and shell.
资助项目	Science and Technology Service Network Plan of the Chinese Academy of Sciences[KFJ-STS-ZDTP-040] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences[QYZDJ-SSW-JSC021] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-ZS-2018-1]
WOS关键词	LAYERED OXIDE CATHODES ; HIGH-ENERGY ; ELECTROCHEMICAL PERFORMANCE ; POSITIVE ELECTRODE ; HIGH-CAPACITY ; SURFACE MODIFICATION ; RICH ; LI ; LINI0.8CO0.1MN0.1O2 ; AL2O3
WOS研究方向	Chemistry ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000495479700005
资助机构	Science and Technology Service Network Plan of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/39148]
专题	中国科学院过程工程研究所
通讯作者	Qu, Jingkui
作者单位	1.Hangzhou Zhonghao Technol Co Ltd, Hangzhou 310000, Zhejiang, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Dept Chem Engn, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Ma, Fei,Wu, Yinghong,Wei, Guangye,et al. Comparative study of simple and concentration gradient shell coatings with Li1.2Ni0.13Mn0.54Co0.13O2 on LiNi0.8Mn0.1Co0.1O2 cathodes for lithium-ion batteries[J]. SOLID STATE IONICS,2019,341:10.
APA	Ma, Fei,Wu, Yinghong,Wei, Guangye,Qiu, Shufeng,Qu, Jingkui,&Qi, Tao.(2019).Comparative study of simple and concentration gradient shell coatings with Li1.2Ni0.13Mn0.54Co0.13O2 on LiNi0.8Mn0.1Co0.1O2 cathodes for lithium-ion batteries.SOLID STATE IONICS,341,10.
MLA	Ma, Fei,et al."Comparative study of simple and concentration gradient shell coatings with Li1.2Ni0.13Mn0.54Co0.13O2 on LiNi0.8Mn0.1Co0.1O2 cathodes for lithium-ion batteries".SOLID STATE IONICS 341(2019):10.