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Cyanide-metal framework derived CoMoO4/Co3O4 hollow porous octahedrons as advanced anodes for high performance lithium ion batteries†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-12-08 00:00:00 , DOI: 10.1039/c7ta08868j
Yingying Chen 1, 2, 3, 4, 5 , Yue Wang 5, 6, 7, 8 , Xiaoping Shen 1, 2, 3, 4, 5 , Rong Cai 5, 6, 7, 8 , Hongxun Yang 5, 6, 7, 8 , Keqiang Xu 1, 2, 3, 4, 5 , Aihua Yuan 5, 6, 7, 8 , Zhenyuan Ji 1, 2, 3, 4, 5
Affiliation  

In this work, CoMoO4/Co3O4 hollow porous octahedrons are synthesized by thermal conversion of a cyanide-metal framework (CMF) compound of Co2[Mo(CN)8xH2O. As anode materials for lithium ion batteries (LIBs), the CoMoO4/Co3O4 electrodes exhibit a remarkably improved electrochemical performance in terms of large lithium storage capacity (1175.1 mA h g−1 at 200 mA g−1), high initial coulombic efficiency (86.9%), outstanding cycling stability (96.9% capacity retention after 100 cycles) and remarkable rate capability (924.2 mA h g−1 at 2000 mA g−1). The excellent electrochemical performance of the CoMoO4/Co3O4 composite can be ascribed to the hollow porous structure and the possible synergistic effect of different components, which could provide more efficient charge storage sites, shorten ion diffusion and electron transport paths, and accommodate the volume change during cycling. The facile synthesis strategy and excellent lithium storage performance make the CoMoO4/Co3O4 hollow porous octahedrons a promising candidate for high-performance LIB anode materials.

中文翻译:

氰化物金属骨架衍生的CoMoO 4 / Co 3 O 4空心多孔八面体作为高性能锂离子电池的高级阳极

在这项工作中,通过对Co 2 [Mo(CN)8x H 2 O的氰化物-金属骨架(CMF)化合物进行热转化,合成了CoMoO 4 / Co 3 O 4中空多孔八面体。作为锂的负极材料离子电池(LIBS),所述的CoMoO 4 / Co的3 ö 4电极表现出在大的锂容量(1175.1毫安汞柱方面具有显着改善电化学性能-1以200mA克-1),高的初始库仑效率(86.9%) ,出色的循环稳定性(100次循环后容量保持率为96.9%)和出色的倍率能力(924.2 mA汞柱)-1在2000毫安克-1)。CoMoO 4 / Co 3 O 4复合材料的优异电化学性能可归因于空心多孔结构以及不同组分可能产生的协同效应,可提供更有效的电荷存储位点,缩短离子扩散和电子传输路径并适应循环过程中的音量变化。简便的合成策略和出色的锂存储性能使CoMoO 4 / Co 3 O 4中空多孔八面体成为高性能LIB阳极材料的有希望的候选者。
更新日期:2017-12-08
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