Hydrogenated vanadium oxides as an advanced anode material in lithium ion batteries
hydrogenation, vanadium oxides, 3D structure, rechargeable lithium ion battery (LIB) anode
ABSTRACT Current research on vanadium oxides in lithium ion batteries (LIBs) considers them as cathode materials, whereas they are rarely studied for use as anodes in LIBs because of their low electrical conductivity and rapid capacity fading. In this work, hydrogenated vanadium oxide nanoneedles were prepared and incorporated into freeze-dried graphene foam. The hydrogenated vanadium oxides show greatly improved charge-transfer kinetics, which lead to excellent electrochemical properties. When tested as anode materials (0.005–3.0 V vs. Li/Li+) in LIBs, the sample activated at 600 °C exhibits high specific capacity (~941 mA·h·g−1 at 100 mAg−1) and high-rate capability (~504 mA·h·g−1 at 5 A·g−1), as well as excellent cycling performance (~285 mA·h·g−1 in the 1,000th cycle at 5 A·g−1). These results demonstrate the promising application of vanadium oxides as anodes in LIBs.
Tsinghua University Press
Yufei Zhang,Huanwen Wang,Jun Yang,Haosen Fan,Yu Zhang,Zhengfei Dai,Yun Zheng,Wei Huang,Xiaochen Dong,Qingyu Yan, Hydrogenated vanadium oxides as an advanced anode material in lithium ion batteries. NanoRes.2017, 10(12): 4266–4273