中国科学:技术科学(英文版)2024,Vol.67Issue(1) :311-320.DOI:10.1007/s11431-022-2335-8

A strategy based on water soluble coal tar pitches to construct MnO2@C composite materials with high electrochemical performance

LIU Bo WANG Kun GUO ZhaoQi HAN BeiBei XU GuiYing JU DongYing AN BaiGang LI YongCheng NI ZhenYong ZHOU WeiMin
中国科学:技术科学(英文版)2024,Vol.67Issue(1) :311-320.DOI:10.1007/s11431-022-2335-8

A strategy based on water soluble coal tar pitches to construct MnO2@C composite materials with high electrochemical performance

LIU Bo 1WANG Kun 2GUO ZhaoQi 1HAN BeiBei 3XU GuiYing 1JU DongYing 4AN BaiGang 1LI YongCheng 5NI ZhenYong 5ZHOU WeiMin1
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作者信息

  • 1. Key Laboratory of Energy Materials and Electrochemistry Research Liaoning Province,University of Science and Technology Liaoning,Anshan 114051,China
  • 2. Key Laboratory of Energy Materials and Electrochemistry Research Liaoning Province,University of Science and Technology Liaoning,Anshan 114051,China;Sinosteel Anshan Research Institute of Thermo-Energy Co.,Ltd.,Anshan 114051,China
  • 3. Advanced Science Research Laboratory,Saitama Institute of Technology,Fusaiji 1690,Japan;Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China
  • 4. Advanced Science Research Laboratory,Saitama Institute of Technology,Fusaiji 1690,Japan;State Key Laboratory of Marine Resource Utilization in South China Sea,Hainan Provincial Key Lab of Fine Chemistry,School of Chemical Engineering and Technology,Hainan University,Haikou 570228,China
  • 5. Liaoning Starry Sky Sodium Battery Co.,Ltd.,Anshan 114051,China
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Abstract

The water soluble coal tar pitches(WS-CTPs)were successfully prepared and used to construct the MnO2@C composite materials by a hydrothermal method.It is interestingly observed that the structures and morphologies of MnO2@C materials can be controlled by controlling the dosages of WS-CTPs and KMnO4.Meanwhile,it is aware that MnO2 exists in the MnO2@C materials in an amorphous state.Compared with MnO2,MnO2@C materials output a remarkable improvement in electro-chemical performance.For instance,MnO2@C-0.3 shows the storage capacity at 965.7 mA h g-1 after 300 cycles at a current density of 0.1 A g-1.In addition,after 600 cycles at a current density of 1.0 A g-1,the storage capacity of MnO2@C-0.3 still keeps 450.3 mA h g-1,indicating that MnO2@C-0.3 owns tremendous cycle stability at a high current density.In view of the fact that the coal tar pitches possess great cost advantages,the strategy of using WS-CTPs as a carbon source to cover the metal oxides is a competitive way to expand the application of metal oxides in the fabrication of electrodes of LIBs.

Key words

water soluble coal tar pitches/MnO2/composite materials/lithium ion batteries(LIBs)/energy storage systems(ESSs)/coal tar pitches

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基金项目

University of Science and Technology Liaoning(601009816-39)

University of Science and Technology Liaoning(2017RC03)

Liaoning Province Education Department of China(601009887-16)

Liaoning Province Education Department of China(LJKQZ2021126)

National Natural Science Foundation of China(51672117)

National Natural Science Foundation of China(51672118)

Postdoctoral Foundation Project of Shenzhen Polytechnic(6020330007K)

出版年

2024
中国科学:技术科学(英文版)
中国科学院

中国科学:技术科学(英文版)

CSTPCDEI
影响因子:1.056
ISSN:1674-7321
参考文献量3
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