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Self-template formation of porous yolk-shell structure Mo-doped NiCo2O4 toward enhanced lithium storage performance as anode material

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Journal of Materials Science & Technology 2022年第7期102卷 186-194页

作者： Yongqiang Ren Xiuyan Li Yinan Wang Qinghua Gong Shaonan Gu Tingting Gao Xuefeng Sun Guowei Zhou Key Laboratory of Fine Chemicals in Universities of Shandong Jinan Engineering Laboratory for Multi-scale Functional MaterialsSchool of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China School of Chemical Engineering and Environment Shandong Peninsula Engineering Research Center of Comprehensive Brine UtilizationWeifang University of Science and TechnologyWeifang 262700China

Hollow ternary metal oxides have shown enormous potential in lithium-ion batteries(LIBs),which is ascribed to their complex chemical composition,abundant active defect sites,and the synergy effect be-tween *** this work,we synthesized Mo-doped NiCo_(2)O_(4) porous spheres with yolk-shell structure by using a simple self-templating ***,other than the yolk-shell structure we had ob-tained,the inner core of the yolk-shell was also porous,which could fully enhance the electrolyte infil-tration and promote the transmission of lithium ions(Li+)and electrons(e−).The diameter of the porous core in the yolk-shell sphere was about 530 nm,and the outer shell’s thickness was up to 110 *** addition,the unique pores in the core appeared in the diameter of about 85 *** this structure,the volume expansion of the anode could be well inhibited during charge/*** exhibited prominent electrochemical performance with high reversible capacity(1338 mA h g^(−1) at 100 mA g^(−1)),satisfactory cycle life(1360 mA h g^(−1) after 200 cycles at 100 mA g^(−1)),and exceptional rate capability(820 mA h g^(−1) at 2000 mA g^(−1))as anode material in LIBs.

关键词： Ternary metal oxides Yolk-shell structure porous inner core Anode material Lithium-ion batteries

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