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...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.展开更多
基金This work was finandally supported by the National Natural Science Foundation of China （Nos. 21171015, 21373195, 51522212 and 51421002）, the ＂Recruitment Program of Global Experts＂, the program for New Century Excellent Talents in University （No. NCET- 12-0515）, the Fundamental Research Funds for the Central Universities （No. WK340000004）, and the Collaborative Innovation Center of Suzhou Nano Science and Technology.
文摘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.
