Study on electrochemical performance of Al-substitution for different cations in Li-rich Mn-based materials

doi:10.1016/j.electacta.2021.139136

IR > 石油化工学院

	Study on electrochemical performance of Al-substitution for different cations in Li-rich Mn-based materials
	Fu, Xiaolan 1; Zhou, Xin'an 1; Zhao, Dongni1,2 ; Liang, Youwei 1; Wang, Peng 1,2; Zhang, Ningshuang1,2 ; Tuo, Kuanyou 1; Lu, Hongli 1; Cai, Xingpeng 1; Mao, Liping1
	2021-10-20
发表期刊	ELECTROCHIMICA ACTA
ISSN	0013-4686
卷号	394
摘要	Layered Li-rich Mn-based cathode materials have attracted immense interest for using in lithium-ion batteries, owing to their high energy density. However, the severe degradation of cycle and rate performances has impeded the actual commercial application. Herein, Al was selected as doping element to substitute for the metal elements of Li, Ni, Co and Mn in Li1.2Mn0.54Ni0.13Co0.13O2 material to promote electrochemical performances and optimize element proportion. Results indicate that when replacing Li with Al, it displays outstanding initial coulombic efficiency of 80.06%. Besides, Al-substitution for Co shows excellent rate performance of 147.3 mAh g(-1) at 5.0 C. Particularly, the replacement of Mn not only shows the highest capacity and voltage retention within the potential range from 2.0 to 4.8 V, but also presents superior capacity retention up to the potential of 5.0 V. Unfortunately, the substitution of Ni displays the worst balanced electrochemical performance among Al-doped materials, which shows lower voltage retention than that of pristine. The reasons why Al-substitution for various cations displays difference on electrochemical performance were discussed from the perspective of migration, dissolution and valence reduction of transition metal ions to the structure evolution in detail. The proposed method and detected action mechanisms can provide guidance on how to optimize materials structure and composition for cathode materials in lithium-ion batteries to obtain electrode materials with excellent comprehensive electrochemical performance. (C) 2021 Elsevier Ltd. All rights reserved.
关键词	Li-ion batteries Li-rich cathode materials Aluminum-doping Structure evolution Fading mechanisms
DOI	10.1016/j.electacta.2021.139136
收录类别	EI ; SCOPUS ; SCIE
语种	英语
WOS研究方向	Electrochemistry
WOS类目	Electrochemistry
WOS记录号	WOS:000702881200006
出版者	PERGAMON-ELSEVIER SCIENCE LTD
EI入藏号	20213610860619
EI主题词	Cathodes
EI分类号	531.1 Metallurgy - 543.2 Manganese and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals
来源库	WOS
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/148734
专题	石油化工学院
通讯作者	Li, Shiyou
作者单位	1.Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Peoples R China; 2.Gansu Key Lab Low Carbon Energy & Chem Engn, 287 Langongping Rd, Lanzhou 730050, Gansu, Peoples R China; 3.Lanzhou Univ Technol, 287 Langongping Rd, Lanzhou 730050, Gansu, Peoples R China
第一作者单位	石油化工学院
通讯作者单位	石油化工学院; 兰州理工大学
第一作者的第一单位	石油化工学院
推荐引用方式 GB/T 7714	Fu, Xiaolan,Zhou, Xin'an,Zhao, Dongni,et al. Study on electrochemical performance of Al-substitution for different cations in Li-rich Mn-based materials[J]. ELECTROCHIMICA ACTA,2021,394.
APA	Fu, Xiaolan.,Zhou, Xin'an.,Zhao, Dongni.,Liang, Youwei.,Wang, Peng.,...&Li, Shiyou.(2021).Study on electrochemical performance of Al-substitution for different cations in Li-rich Mn-based materials.ELECTROCHIMICA ACTA,394.
MLA	Fu, Xiaolan,et al."Study on electrochemical performance of Al-substitution for different cations in Li-rich Mn-based materials".ELECTROCHIMICA ACTA 394(2021).