High-rate lithium-ion battery performance of a ternary sea urchin-shaped CoNiO2@NiP6Mo18/CNTs composites

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外文摘要：Bimetallic oxides are attractive anode materials for lithium-ion batteries(LIBs)due to their large theoret-ical capacity.However,the low conductivity,short cycle life,and poor rate capability are the bottlenecks for their further applications.To overcome above issues,the basket-like polymolybdate(NiP6Mo18)and carbon nanotubes(CNTs)were uniformly embedded on the urchin-shaped CoNiO2 nanospheres to yield a ternary composites CoNiO2@NiP6Mo18/CNTs via electrostatic adsorption.The multi-level morphology of urchin spinules accelerates the diffusion rate of Li+;CNT improves the conductivity and enhances cycle stability of the material;and heteropoly acid contributes more redox activity centres.Thus,CoNiO2@NiP6Mo18/CNTs as an anode of LIBs exhibits a high initial capacity(1396.7 mA h g-1 at 0.1 A g-1),long-term cycling stability(750.2 mA h g-1 after 300 cycles),and rate performance(450.3 mA h g-1 at 2 A g-1),which are superior to reported metallic oxides anode of LIBs.The density functional theory(DFT)and kinetic mechanism suggest that CoNiO2@NiP6Mo18/CNTs delivers an out-standing pseudocapacitance and rapid Li+diffusion behaviors,which is due to the rich surface area of the urchin-like CoNiO2 with the uniform embeddedness of NiP6Mo18 and CNTs.This study provides a new idea for optimizing the performance of bimetallic oxides and developing high-rate lithium-ion bat-tery composites.

外文关键词：

Bi-metal oxidesTransition metal oxidesPolyoxometalatesNanocompositeLIBs

作者：

Li-ping Cui、Shuang Sun、Kai Yu、Shu Zhang、Mei-lin Wang、Jia-jia Chen、Bai-bin Zhou

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作者单位：

Key Laboratory for Photonic and Electronic Bandgap Materials,Ministry of Education,School of Chemistry and Chemical Engineering,Harbin Normal University,Harbin 150025,Heilongjiang,China

State Key Laboratory of Physical Chemistry of Solid Surfaces,Department of Chemistry,College of Chemistry and Chemical Engineering,Collaborative Innovation Centre of Chemistry for Energy Materials,Xiamen University,Xiamen 361005,Fujian,China

基金：

National Science Foundation of ChinaNational Science Foundation of ChinaNational Science Foundation of China2020 Central Government's Plan to Support the Talent Training Project of the Reform and Development Fund of Local UniversitiNatural Science Foundation of Heilongjiang Province of ChinaFundamental Research Funds for the Central Universities

项目编号：

2217106121771046222721432020GSP03ZD2021B00220720220009

出版年：

2024

DOI：

10.1016/j.jechem.2024.04.043

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.96(9)