Insights into the improved cycle and rate performance by ex-situ F and in-situ Mg dual doping of layered oxide cathodes for sodium-ion batteries

doi:10.1016/j.ensm.2021.11.016

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Insights into the improved cycle and rate performance by ex-situ F and in-situ Mg dual doping of layered oxide cathodes for sodium-ion batteries
	Cui, Xiaoling 2,3; Wang, Shimin 2,3; Ye, Xiushen 1; Fan, Xiaoqi 2; Gao, Cankun 2; Quan, Yin 2; Wen, Shuxiang 2; Cai, Xingpeng 2; Huang, Jin 2; Li, Shiyou 2,3,4
刊名	Energy Storage Materials
	2022-03-01
卷号	45 页码:1153-1164
关键词	Binary alloys Cathodes Chemical bonds Electric discharges Iron compounds Magnesium compounds Metal ions Nickel compounds Phosphorus compounds Sodium compounds Transition metals Double doping Ex situ F-doping In-situ doping In-situ mg Layered oxides Manganese-based layered oxide Mg-doping P2 phase Performance
ISSN号	2405-8297
DOI	10.1016/j.ensm.2021.11.016
英文摘要	P2 phase layered manganese-based transition metal (TM) oxides have been extensively studied as cathode materials in Sodium ion batteries (SIBs). Herein, ex-situ F-doping P2-type layered Na0.67Ni0.15Fe0.2Mn0.65F0.05O1.95 (NFMF-005) is synthesized firstly by coprecipitation to reduce the capacity fading caused by irreversible phase transition and Jahn-Teller effect. Because the bond energy of O[sbnd]O and TM-O are changed owing to O sites are occupied by F, leading to the decrease of the interatomic distance of TM and the increase of the interlayer spacing, NFMF-005 can provide wider ion transport channel and suppress structural deformation. To inhibit phase transition completely and mitigate the slide of TM layers, in-situ Mg-doping is secondly carried out by electrochemical method after F-doping of NFMF-005. The obtained Mg-doping P2-type NM-NFMF005 possesses outstanding electrochemical performance, delivering the specific capacity of 229 mAh g−1, the capacity retention of 87.7% after 50 cycles and discharge specific capacity of 100 mAh g−1 at 10 C. Mg-Mg dimers are used to explain its superior performance, which exhibit pillar effect not only to stretch the interlayer space, but also to enhance the mechanical strength and improve structure stability. All the results illustrate that the double-doping of F and Mg can play synergistic role to promote the performance of SIBs. This work is promising to further expand strategies and areas of materials doping. This new electrochemical doping method will also provide guidance for the rational design of SIBs layered cathode materials. © 2021 Elsevier B.V.
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	Elsevier B.V.
WOS记录号	WOS:000781899500010
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157862]
专题	石油化工学院
作者单位	1.Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt Lakes, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining; 810008, China; 2.School of Petrochemical Technology, Lanzhou University of Technology, 36 Pengjiaping Road, Lanzhou; Gansu; 730050, China; 3.Key Laboratory of Low carbon Energy and Chemical Industry of Gansu Province, Lanzhou; 730050, China; 4.Gansu Engineering Laboratory of Cathode Material for Lithium-ion Battery, Baiyin; 730900, China
推荐引用方式 GB/T 7714	Cui, Xiaoling,Wang, Shimin,Ye, Xiushen,et al. Insights into the improved cycle and rate performance by ex-situ F and in-situ Mg dual doping of layered oxide cathodes for sodium-ion batteries[J]. Energy Storage Materials,2022,45:1153-1164.
APA	Cui, Xiaoling.,Wang, Shimin.,Ye, Xiushen.,Fan, Xiaoqi.,Gao, Cankun.,...&Li, Shiyou.(2022).Insights into the improved cycle and rate performance by ex-situ F and in-situ Mg dual doping of layered oxide cathodes for sodium-ion batteries.Energy Storage Materials,45,1153-1164.
MLA	Cui, Xiaoling,et al."Insights into the improved cycle and rate performance by ex-situ F and in-situ Mg dual doping of layered oxide cathodes for sodium-ion batteries".Energy Storage Materials 45(2022):1153-1164.