文献类型：期刊文献

英文题名：Self-assembled 3D Fe2(MoO4)3 microspheres with amorphous shell as anode of lithium-ion batteries with superior electrochemical performance

作者：Su, Yun[1,2]; Chen, Shuangqiang[1]; Yang, Qinsi[1]; Wang, Yong[1]

第一作者：苏芸;Su, Yun

通讯作者：Chen, Shuangqiang

机构：[1] Department of Chemical Engineering, School of Environmental and Chemical Engineering, Shanghai University, Shangda Road 99, Shanghai, 200444, China; [2] Physics and Electronic Engineering Department, Xinxiang University, Jinsui Road 181, Xinxiang, 453003, China

第一机构：Department of Chemical Engineering, School of Environmental and Chemical Engineering, Shanghai University, Shangda Road 99, Shanghai, 200444, China

年份：2020

卷号：217

外文期刊名：Chemical Engineering Science

收录：EI(收录号：20200608142599);Scopus(收录号：2-s2.0-85078969231)

语种：英文

外文关键词：Anodes - Microspheres - Free energy - Lithium-ion batteries - Shells (structures) - Ions - Morphology - Redox reactions - Gibbs free energy - Grain boundaries - Molybdenum compounds

摘要：Metal molybdates are regarding as promising electrode materials for next-generation lithium-ion batteries (LIBs). However, the poor electronic conductivity and sluggish ion diffusion are the two main obstacles that limit their electrochemical performances. In this work, self-assembled hierarchical Fe2(MoO4)3 microspheres with a thin amorphous shell (FMO-A) were prepared via a morphology-tunable and template-free hydrothermal method as an example of metal molybdates for LIBs. The morphologies were easily tunable by changing experimental parameters, such as the pH value, and reaction time. When applied as anode of LIBs, FMO-A delivered a high reversible capacity of 1138.2 mAh g?1 after 250 cycles at 100 mA g?1 and displayed remarkable rate performances. This is mainly ascribed to the unique hierarchical structure and high surface area of Fe2(MoO4)3 and the thin amorphous shell on providing low Gibbs free energy on redox reactions, reduced grain boundaries, isotropic nature, and buffering volume variations during cycles. ? 2020