A highly homogeneous nanocoating strategy for Li-rich Mn-based layered oxides based on chemical conversion - 文章详情页

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Herein,　we　report　a　novel　strategy　for　preparing　a　highly　homogeneous　nanocoating　for　Li-rich　Mn-based　layered　oxides　by　the　elemental　Al　doping　followed　by　chemical　conversion　in　phosphate　buffer　solution.　X-ray　photoelectron　spectroscopy,　soft　X-ray　absorption　spectroscopy　and　transmission　electron　microscopy　results　exhibit　that　there　exist　AlPO4　nanocoating　on　the　surface　of　particles.　The　resultant　AlPO4-nanocoated　Li[Li0.2Ni0.11Co0.11Mn0.54Al0.04]O2　particles　exhibit　a　greatly　enhanced　reversible　capacity　with　superior　thermal　stabilities　in　relative　to　pristine　Li[Li0.2Ni0.13Co0.13Mn0.54]O2.　Under　a　current　density　of　30　mA　g-1　the　AlPO4-nanocoated　Li[Li0.2Ni0.11Co0.11Mn0.54Al0.04]O2　can　deliver　a　specific　capacity　of　282.1　mAh　g-1　with　capacity　retention　of　89%　after　35　cycles.　©　2014　Elsevier　B.V.　All　rights　reserved.

关键词：

Aluminum compounds Cathode materials Cathodes Cobalt compounds Composite coatings High resolution transmission electron microscopy Lithium compounds Lithium-ion batteries Nickel compounds Phosphorus compounds Segregation (metallography) X ray absorption spectroscopy X ray photoelectron spectroscopy X rays

作者机构：

[ 1 ] [Ma, Jin]College of Engineering, Peking University, Key Lab. of Theory and Technology for Advanced Batteries Materials, No. 5 Yiheyuan Road Haidian District, Beijing, China
[ 2 ] [Li, Biao]College of Engineering, Peking University, Key Lab. of Theory and Technology for Advanced Batteries Materials, No. 5 Yiheyuan Road Haidian District, Beijing, China
[ 3 ] [An, Li]College of Engineering, Peking University, Key Lab. of Theory and Technology for Advanced Batteries Materials, No. 5 Yiheyuan Road Haidian District, Beijing, China
[ 4 ] [Wei, Hang]College of Engineering, Peking University, Key Lab. of Theory and Technology for Advanced Batteries Materials, No. 5 Yiheyuan Road Haidian District, Beijing, China
[ 5 ] [Wang, Xiayan]Department of Chemistry and Chemical Engineering, Beijing University of Technology, Key Laboratory for Green Catalysis and Separation, No.100, Pingleyuan, Chaoyang District, Beijing, China
[ 6 ] [Yu, Pingrong]College of Engineering, Peking University, Key Lab. of Theory and Technology for Advanced Batteries Materials, No. 5 Yiheyuan Road Haidian District, Beijing, China
[ 7 ] [Xia, Dingguo]College of Engineering, Peking University, Key Lab. of Theory and Technology for Advanced Batteries Materials, No. 5 Yiheyuan Road Haidian District, Beijing, China

通讯作者信息：

夏定国
[xia, dingguo]college of engineering, peking university, key lab. of theory and technology for advanced batteries materials, no. 5 yiheyuan road haidian district, beijing, china

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