Article Title

Facile synthesis of porous germanium-iron bimetal oxide nanowires as anode materials for lithium-ion batteries

Authors

Xiongwu Zhong, Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences (CAS), Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Huijuan Huan, Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences (CAS), Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Xiaowu Liu, Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences (CAS), Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Yan Yu, Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences (CAS), Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China

Keywords

lithium-ion batteries, anode materials, germanium oxide, iron oxide, nanowires

Abstract

ABSTRACT Germanium-based oxide has been found to be a promising high-capacity anode material for lithium-ion batteries (LIBs). However, it exhibits poor electrochemical performance because of the drastic volume change during cycling. Herein, we designed porous Ge-Fe bimetal oxide nanowires (Ge-Fe-Ox-700 NWs) by a large-scale and facile solvothermal reaction. When used as the anode material for LIBs, these Ge-Fe-Ox-700 NWs exhibited superior electrochemical performance (~ 1,120 mAh·g−1 at a current density of 100 mA·g−1) and good cycling performance (~ 750 mAh·g−1 after 50 cycles at a current density of 100 mA·g−1). The improved performance is due to the small NW diameter, which allows for better accommodation of the drastic volume changes and zero-dimensional nanoparticles, which shorten the diffusion length of ions and electrons.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-017-1938-z

Publisher

Tsinghua University Press

Recommended Citation

Xiongwu Zhong,Huijuan Huan,Xiaowu Liu,Yan Yu, Facile synthesis of porous germanium-iron bimetal oxide nanowires as anode materials for lithium-ion batteries. NanoRes.2018, 11(7): 3702–3709