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

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外文摘要：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.

外文关键词：

water soluble coal tar pitchesMnO2composite materialslithium ion batteries(LIBs)energy storage systems(ESSs)coal tar pitches

作者：

LIU Bo、WANG Kun、GUO ZhaoQi、HAN BeiBei、XU GuiYing、JU DongYing、AN BaiGang、LI YongCheng、NI ZhenYong、ZHOU WeiMin

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作者单位：

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

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

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

Liaoning Starry Sky Sodium Battery Co.,Ltd.,Anshan 114051,China

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基金：

University of Science and Technology LiaoningUniversity of Science and Technology LiaoningLiaoning Province Education Department of ChinaLiaoning Province Education Department of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaPostdoctoral Foundation Project of Shenzhen Polytechnic

项目编号：

601009816-392017RC03601009887-16LJKQZ202112651672117516721186020330007K

出版年：

2024

DOI：

10.1007/s11431-022-2335-8

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

年,卷(期)：2024.67(1)

参考文献量3