CoMoO4 Nanoparticles Anchored on Reduced Graphene Oxide Nanocomposites as Anodes for Long-Life Lithium-Ion Batteries

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• 作者：Jianyu Yao ; Yongji Gong ; Shubin Yang ; Peng Xiao ; Yunhuai Zhang ; Kunttal Keyshar ; Gonglan Ye ; Sehmus Ozden ; Robert Vajtai ; Pulickel M. Ajayan
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：November 26, 2014
• 年：2014
• 卷：6
• 期：22
• 页码：20414-20422
• 全文大小：598K
• ISSN：1944-8252

文摘

A self-assembled CoMoO₄ nanoparticles/reduced graphene oxide (CoMoO₄NP/rGO), was prepared by a hydrothermal method to grow 3鈥? nm sized CoMoO₄ particles on reduced graphene oxide sheets and used as an anode material for lithium-ion batteries. The specific capacity of CoMoO₄NP/rGO anode can reach up to 920 mAh g^鈥? at a current rate of 74 mA g^鈥? in the voltage range between 3.0 and 0.001 V, which is close to the theoretical capacity of CoMoO₄ (980 mAh g^鈥?). The fabricated half cells also show good rate capability and impressive cycling stability with 8.7% capacity loss after 600 cycles under a high current density of 740 mA g^鈥?. The superior electrochemical performance of the synthesized CoMoO₄NP/rGO is attributed to the synergetic chemical coupling effects between the conductive graphene networks and the high lithium-ion storage capability of CoMoO₄ nanoparticles.

Keywords:

CoMoO₄ nanoparticles; reduced graphene oxide; hydrothermal synthesis; lithium-ion batteries; anode materials