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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