LiNi0.8Co0.15Al0.05O2: Enhanced Electrochemical Performance From Reduced Cationic Disordering in Li Slab

Abstract Sub-micron sized LiNi0.8Co0.15Al0.05O2 cathode materials with improved electrochemical performance caused by the reduced cationic disordering in Li slab were synthesized through a solid state reaction routine. In a typical process, spherical precursor powder was prepared by spray drying of...

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Autores principales:	Peng Xiao, Tingjian Lv, Xueping Chen, Chengkang Chang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c7c291b6be38484c9bb3e7a3ffa2e529
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spelling	oai:doaj.org-article:c7c291b6be38484c9bb3e7a3ffa2e5292021-12-02T12:32:34ZLiNi0.8Co0.15Al0.05O2: Enhanced Electrochemical Performance From Reduced Cationic Disordering in Li Slab10.1038/s41598-017-01657-92045-2322https://doaj.org/article/c7c291b6be38484c9bb3e7a3ffa2e5292017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01657-9https://doaj.org/toc/2045-2322Abstract Sub-micron sized LiNi0.8Co0.15Al0.05O2 cathode materials with improved electrochemical performance caused by the reduced cationic disordering in Li slab were synthesized through a solid state reaction routine. In a typical process, spherical precursor powder was prepared by spray drying of a uniform suspension obtained from the ball-milling of the mixture of the starting raw materials. Then the precursor powders were pressed into tablets under different pressures and crushed into powder. The pressing treated powders were finally calcinated under oxygen atmosphere to obtain the target cathode materials. XRD investigation revealed a hexagonal layered structure without impurity phase for all samples and significant increase in the diffraction intensity ratio of I(003)/I(104) was observed. Rietveld refinement further confirmed the reduced cationic disordering in Li slab by such pressing treatment, and the smallest disordering was observed for sample S4 with only 1.3% Ni ions on Li lattice position. The electrochemical testing showed an improvement in electrochemical behavior for those pressing treated samples. The calculation of diffusion coefficients using EIS data showed improved Li diffusion coefficient after pressing treatment. The sample S4 presented a diffusion coefficient of 4.36 × 10−11 cm2·s−1, which is almost 3.5 times the value of untreated sample.Peng XiaoTingjian LvXueping ChenChengkang ChangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Peng Xiao Tingjian Lv Xueping Chen Chengkang Chang LiNi0.8Co0.15Al0.05O2: Enhanced Electrochemical Performance From Reduced Cationic Disordering in Li Slab
description	Abstract Sub-micron sized LiNi0.8Co0.15Al0.05O2 cathode materials with improved electrochemical performance caused by the reduced cationic disordering in Li slab were synthesized through a solid state reaction routine. In a typical process, spherical precursor powder was prepared by spray drying of a uniform suspension obtained from the ball-milling of the mixture of the starting raw materials. Then the precursor powders were pressed into tablets under different pressures and crushed into powder. The pressing treated powders were finally calcinated under oxygen atmosphere to obtain the target cathode materials. XRD investigation revealed a hexagonal layered structure without impurity phase for all samples and significant increase in the diffraction intensity ratio of I(003)/I(104) was observed. Rietveld refinement further confirmed the reduced cationic disordering in Li slab by such pressing treatment, and the smallest disordering was observed for sample S4 with only 1.3% Ni ions on Li lattice position. The electrochemical testing showed an improvement in electrochemical behavior for those pressing treated samples. The calculation of diffusion coefficients using EIS data showed improved Li diffusion coefficient after pressing treatment. The sample S4 presented a diffusion coefficient of 4.36 × 10−11 cm2·s−1, which is almost 3.5 times the value of untreated sample.
format	article
author	Peng Xiao Tingjian Lv Xueping Chen Chengkang Chang
author_facet	Peng Xiao Tingjian Lv Xueping Chen Chengkang Chang
author_sort	Peng Xiao
title	LiNi0.8Co0.15Al0.05O2: Enhanced Electrochemical Performance From Reduced Cationic Disordering in Li Slab
title_short	LiNi0.8Co0.15Al0.05O2: Enhanced Electrochemical Performance From Reduced Cationic Disordering in Li Slab
title_full	LiNi0.8Co0.15Al0.05O2: Enhanced Electrochemical Performance From Reduced Cationic Disordering in Li Slab
title_fullStr	LiNi0.8Co0.15Al0.05O2: Enhanced Electrochemical Performance From Reduced Cationic Disordering in Li Slab
title_full_unstemmed	LiNi0.8Co0.15Al0.05O2: Enhanced Electrochemical Performance From Reduced Cationic Disordering in Li Slab
title_sort	lini0.8co0.15al0.05o2: enhanced electrochemical performance from reduced cationic disordering in li slab
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c7c291b6be38484c9bb3e7a3ffa2e529
work_keys_str_mv	AT pengxiao lini08co015al005o2enhancedelectrochemicalperformancefromreducedcationicdisorderinginlislab AT tingjianlv lini08co015al005o2enhancedelectrochemicalperformancefromreducedcationicdisorderinginlislab AT xuepingchen lini08co015al005o2enhancedelectrochemicalperformancefromreducedcationicdisorderinginlislab AT chengkangchang lini08co015al005o2enhancedelectrochemicalperformancefromreducedcationicdisorderinginlislab
_version_	1718394061483671552

LiNi0.8Co0.15Al0.05O2: Enhanced Electrochemical Performance From Reduced Cationic Disordering in Li Slab

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