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Improved storage capability and cycle stability in a Li-riched cathode by substituted Al
Song, Changkun; Feng, Wangjun; Wang, Xuan; Shi, Zhaojiao
2020-04
Source PublicationJOURNAL OF ELECTROANALYTICAL CHEMISTRY
ISSN1572-6657
Volume862
AbstractA lithium-rich layered cathode material Li1.2Mn0.54Ni0.13Co0.13O2 with high specific capacity and good cycle stability was successfully synthesized by a modified sol-gel method. The Li element was replaced by Al, and Li1.16Mn0.54Ni0.13Co0.13Al0.04O2 material with better performance was obtained. Characterized and observed by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), Al substitutedmaterial not only has a good crystal structure and a layered structure but also improves structural stability. The electrochemical results show that Al-substitution Li1.16Mn0.54Ni0.13Co0.13Al0.04O2 material has good electrochemical performance. The initial discharge capacity at room temperature is 271 mAh/g in the potential range of 2.0-4.8 V at 0.1C rate. Even at high rates of 0.5C and 2C, the material provides 185 mAh/g and 156.1 mAh/g capacity, with capacity retention rates of 85.2% and 87.3% after 200 cycles, respectively. Therefore, the positive electrode material synthesized by the sol-gel method after doping Al may be an efficient method for replacing the electrode material.
KeywordLi-rich Mn-based Al doping Capacity retention Electrochemical performance
DOI10.1016/j.jelechem.2020.113962
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[.21965019]
WOS Research AreaChemistry ; Electrochemistry
WOS SubjectChemistry, Analytical ; Electrochemistry
WOS IDWOS:000525903900008
PublisherELSEVIER SCIENCE SA
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64199
Collection理学院
Corresponding AuthorFeng, Wangjun
AffiliationLanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China
First Author AffilicationColl Sci
Corresponding Author AffilicationColl Sci
First Signature AffilicationColl Sci
Recommended Citation
GB/T 7714
Song, Changkun,Feng, Wangjun,Wang, Xuan,et al. Improved storage capability and cycle stability in a Li-riched cathode by substituted Al[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY,2020,862.
APA Song, Changkun,Feng, Wangjun,Wang, Xuan,&Shi, Zhaojiao.(2020).Improved storage capability and cycle stability in a Li-riched cathode by substituted Al.JOURNAL OF ELECTROANALYTICAL CHEMISTRY,862.
MLA Song, Changkun,et al."Improved storage capability and cycle stability in a Li-riched cathode by substituted Al".JOURNAL OF ELECTROANALYTICAL CHEMISTRY 862(2020).
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