首页|Structural engineering of CoMoO3 nanosheets on cage-like carbon nanoflakes toward enhanced lithium storage performance

Structural engineering of CoMoO3 nanosheets on cage-like carbon nanoflakes toward enhanced lithium storage performance

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  • NSTL
  • Elsevier
? 2022 Elsevier B.V.Bimetal oxides possess high electronic conductivity and multiple electrochemically active sites owing to their stepwise electrochemical reactions compared with the single metal oxides. However, bimetal oxides still suffer from the severe volume changes upon lithium insertion/delithiation processes, thus leading to poor cycle stability. Herein, we demonstrate the growth of novel CoMoO3 nanosheets on the cage-like carbon nanoflakes (c-CNFs) through a facile in-situ thermal decomposition strategy. The phase and morphology structures of CoMoO3 can be readily controlled by adjusting the sintering temperature under the argon atmosphere, changing from 0D CoMoO4 nanoparticles@c-CNFs (350 ℃, denoted as CoMoO4 @C) to 0D CoMoO4 nanoparticles and 2D CoMoO3 nanosheets co-existed nanohybrids@c-CNFs (450 ℃, denoted as CoMoOx @C) and 2D CoMoO3 nanosheets@c-CNFs (550 ℃, denoted as CoMoO3 @C). When examined as anode materials for LIBs, the CoMoO3 @C electrode exhibited excellent lithium storage performance. The superior performance of the CoMoO3 @C electrode could be attributed to the novel CoMoO3 nanosheet structure combined with the reduced volume change from well-fitted CoMoO3 @c-CNFs, which delivered a reversible capacity of ~706 mA h/g for 360 cycles at 500 mA/g, higher than that of the CoMoO4 @C and CoMoOx @C electrodes.

2D CoMoO3 nanosheetsCage-like carbon nanoflakesElectrochemical performanceLithium ion batteries

Wang J.、Wang Z.、Yao T.、Wang H.、Wang L.

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School of Mechanical and Electrical Engineering Xi'an University of Architecture and Technology

State Key Lab of Electrical Insulation and Power Equipment Center of Nanomaterials for Renewable Energy (CNRE) School of Electrical Engineering Xi'an Jiaotong University

2022

10.1016/j.jallcom.2022.166871

Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN：0925-8388
年,卷(期)：2022.926
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