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Self-assembled GeOX/Ti3C2TX Composites as Promising Anode Materials for Lithium Ion Batteries
journal contribution
posted on 2020-03-19, 19:23 authored by Sheng-chao Song, Ding-chuan Zuo, Chang-sheng An, Xia-hui Zhang, Jin-hui Li, Zhen-jiang He, Yun-jiao Li, Jun-chao ZhengHigh-capacity germanium-based
anode materials are alternative materials
for outstanding electrochemical performance lithium-ion batteries
(LIBs), but severe volume variation and pulverization problems during
charging–discharging processes can seriously affect their electrochemical
performance. In addressing this challenge, a simple strategy was used
to prepare the self-assembled GeOX/Ti3C2TX composite in which the GeOX nanoparticles
can grow directly on Ti3C2TX layers.
Nanoscale GeOX uniformly renucleates on the surface and
interlayers of Ti3C2TX, forming the
stable multiphase structure, which guarantees its excellent electrochemical
performance. Electrochemical evaluation has shown that the rate capability
and reversibility of GeOX/Ti3C2TX are both greatly improved, which delivers a reversible discharge
specific capacity of above 1400 mAh g–1 (at 100
mA g–1) and a reversible specific capacity of 900
mAh g–1 after 50 cycles while it still maintains
a stable specific capacity of 725 mAh g–1 at 5000
mA g–1. Furthermore, the composite exhibits an exceptionally
superior rate capability, making it a good electrochemical performance
anode for LIBs.