ISL OpenIR  > 青海盐湖研究所知识仓储
Improvement in the electrochemical performance of a LiNi0.5Mn0.5O2 cathode material at high voltage
Li, Faqiang1,3,4; Yang, Guowei1,2,3; Jia, Guofeng1,3; Shangguan, Xuehui1,2,3; Zhuge, Qin1,3; Bai, Bin4
2017-11-01
Source PublicationJOURNAL OF APPLIED ELECTROCHEMISTRY
Volume47Issue:11Pages:1189-1201
SubtypeArticle
AbstractLayered LiNi0.5-x Ca (x) Mn0.5O2 (0 <= x <= 0.2) cathode materials were prepared through a combination of co-precipitation and a solid-state method. The prepared cathode materials were investigated in detail by X-ray diffraction (XRD), Rietveld refinement, inductively coupled plasma, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), cyclic voltammetry and charge-discharge measurements. The results of XRD, Rietveld refinement, XPS and SEM measurements revealed that Ca-doping can increase the stability of the structure and lower the amount of Li/Ni cation mixing. Furthermore, Ca-doping was not observed to affect the morphology or oxidation states of the LiNi0.5Mn0.5O2. The electrochemical measurements showed that the pristine LiNi0.5Mn0.5O2 material has the lowest discharge capacity of 88.6 mAh g(-1) between 3 and 4.5 V at a constant density of 0.2 C, which was improved 38% by doping with 3 mol% of Ca. Additionally, the capacity retention of the 3 mol% Ca-doping is 20% higher than that of the pristine LiNi0.5Mn0.5O2 material in the voltage range of 3.0-4.5 V. Furthermore, we investigated the source of the enhancement of the electrochemical properties from Ca-doping. The improvement may be attributed to increased structural stability, lowered Li/Ni cation mixing, decreased polarization, reduced migration resistance and faster lithium-ion diffusion.
KeywordCa-doping Lini0.5mn0.5o2 Cathode Material Lithium-ion Batteries Co-precipitation And Solid-state Method
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordLITHIUM-ION BATTERIES ; LAYERED LINI0.5MN0.5O2 ; PHYSICAL-PROPERTIES ; THIN-FILM ; TEMPERATURE ; SIMULATION ; MORPHOLOGY ; BEHAVIOR ; ROUTE ; CELLS
Indexed BySCI
Language英语
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
WOS IDWOS:000412932300001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6263
Collection青海盐湖研究所知识仓储
盐湖资源与化学实验室
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Qinghai, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Key Lab Salt Lake Resources Chem Qinghai Prov, Xining 810008, Qinghai, Peoples R China
4.Qinghai Green Grass New Energy Technol Co Ltd, Qinghai Res Ctr Low Temp Lithium Battery Technol, Xining 810000, Qinghai, Peoples R China
Recommended Citation
GB/T 7714
Li, Faqiang,Yang, Guowei,Jia, Guofeng,et al. Improvement in the electrochemical performance of a LiNi0.5Mn0.5O2 cathode material at high voltage[J]. JOURNAL OF APPLIED ELECTROCHEMISTRY,2017,47(11):1189-1201.
APA Li, Faqiang,Yang, Guowei,Jia, Guofeng,Shangguan, Xuehui,Zhuge, Qin,&Bai, Bin.(2017).Improvement in the electrochemical performance of a LiNi0.5Mn0.5O2 cathode material at high voltage.JOURNAL OF APPLIED ELECTROCHEMISTRY,47(11),1189-1201.
MLA Li, Faqiang,et al."Improvement in the electrochemical performance of a LiNi0.5Mn0.5O2 cathode material at high voltage".JOURNAL OF APPLIED ELECTROCHEMISTRY 47.11(2017):1189-1201.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, Faqiang]'s Articles
[Yang, Guowei]'s Articles
[Jia, Guofeng]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, Faqiang]'s Articles
[Yang, Guowei]'s Articles
[Jia, Guofeng]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, Faqiang]'s Articles
[Yang, Guowei]'s Articles
[Jia, Guofeng]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.