文献类型：期刊文献

英文题名：Nature of Bimetallic Oxide Sb2MoO6/rGO Anode for High-Performance Potassium-Ion Batteries

作者：Wang, Jue[1]; Wang, Bin[2]; Liu, Zhaomeng[1]; Fan, Ling[1]; Zhang, Qingfeng[1]; Ding, Hongbo[1]; Wang, Longlu[1]; Yang, Hongguan[1]; Yu, Xinzhi[1]; Lu, Bingan[1,3]

第一作者：Wang, Jue

通讯作者：Lu, Bingan

机构：[1] School of Physics and Electronics, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, 410082, China; [2] Physics and Electronic Engineering Department, Xinxiang University, Xinxiang, 453003, China; [3] Fujian Strait Research Institute of Industrial Graphene Technologies, Quanzhou, 362000, China

第一机构：School of Physics and Electronics, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, 410082, China

通讯机构：[1]School of Physics and Electronics, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, 410082, China

年份：2019

卷号：6

期号：17

外文期刊名：Advanced Science

收录：EI(收录号：20192507078576);Scopus(收录号：2-s2.0-85067525464)

语种：英文

外文关键词：Antimony compounds - Density functional theory - Electric discharges - Graphene - Ions - Lithium-ion batteries - Molybdenum compounds - Molybdenum metallography - Potassium - Transmission electron microscopy - X ray diffraction

摘要：Potassium-ion batteries (KIBs) are one of the most appealing alternatives to lithium-ion batteries, particularly attractive in large-scale energy storage devices considering the more sufficient and lower cost supply of potassium resources in comparison with lithium. To achieve more competitive KIBs, it is necessary to search for anode materials with a high performance. Herein, the bimetallic oxide Sb2MoO6, with the presence of reduced graphene oxide, is reported as a high-performance anode material for KIBs in this study, achieving discharge capacities as high as 402 mAh g?1 at 100 mA g?1 and 381 mAh g?1 at 200 mA g?1, and reserving a capacity of 247 mAh g?1 after 100 cycles at a current density of 500 mA g?1. Meanwhile, the potassiation/depotassiation mechanism of this material is probed in-depth through the electrochemical characterization, operando X-ray diffraction, transmission electron microscope, and density functional theory calculation, successfully unraveling the nature of the high-performance anode and the functions of Sb and Mo in Sb2MoO6. More importantly, the phase development and bond breaking sequence of Sb2MoO6 are successfully identified, which is meaningful for the fundamental study of metal-oxide based electrode materials for KIBs. ? 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim