储能科学与技术 ›› 2022, Vol. 11 ›› Issue (7): 2103-2113.doi: 10.19799/j.cnki.2095-4239.2022.0120

• 储能材料与器件 • 上一篇    下一篇

基于CiteSpace知识图谱的锂电池复合电解质可视化分析

霍思达(), 薛文东(), 李新丽, 李勇   

  1. 北京科技大学材料科学与工程学院,北京 100083
  • 收稿日期:2022-03-07 修回日期:2022-03-22 出版日期:2022-07-05 发布日期:2022-06-29
  • 通讯作者: 薛文东 E-mail:g20208393@xs.ustb.edu.cn;xuewendong@ustb.edu.cn
  • 作者简介:霍思达(1997—),男,硕士研究生,研究方向为新能源材料及复合功能材料,E-mail:g20208393@xs.ustb.edu.cn
  • 基金资助:
    中央高校基本科研基金项目(FRF-MP-20-28)

Visualization analysis of composite electrolytes for lithium battery based on CiteSpace

Sida HUO(), Wendong XUE(), Xinli LI, Yong LI   

  1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2022-03-07 Revised:2022-03-22 Online:2022-07-05 Published:2022-06-29
  • Contact: Wendong XUE E-mail:g20208393@xs.ustb.edu.cn;xuewendong@ustb.edu.cn

摘要:

固态电解质具备高能量密度、高容量、高安全性等特点被认为是理想的电解质材料。无机固态电解质具有较高的离子电导率和力学性能,但其与电极间阻抗高、接触差;聚合物固态电解质有良好的柔性和可加工性,但离子电导率远远达不到应用要求。有机-无机复合电解质兼备两者的优点,是目前最适用于应用推广的材料之一,但在离子电导率和电化学稳定性方面还差强人意。本文基于Web of Science核心合集数据库回顾了近30年关于有机-无机复合电解质的相关文献,利用CiteSpace对相关数据进行了可视化整理。并针对复合电解质发展过程的重要节点和近5年的研究热点进行了深入分析。结果发现目前复合电解质方向研究热度正处于指数上升阶段;复合电解质的最新研究聚焦于凝胶态、单离子导体结构和聚碳酸酯基材料等方向;界面是复合电解质研究的关键问题,是近五年突现强度最高的关键词。关于下阶段复合电解质的开发要围绕:①半固态复合电解质的材料选择和结构设计;②电解质内部相间界面结构和传输机理的研究;③电解质与电极间构建稳定的弹性SEI/CEI膜。

关键词: 锂离子电池, 复合电解质, 可视化分析, CiteSpace

Abstract:

A solid electrolyte is an ideal electrolyte material with high energy density, high capacity, and high safety. Inorganic solid electrolytes have high ionic conductivity and mechanical properties; however, they exhibit high impedance and poor with contact electrode. Polymer solid electrolytes have good flexibility and machinability; however, their ionic conductivity does not satisfy application requirements. Organic-inorganic composite electrolytes possess the advantages of inorganic and polymer solid electrolytes; thus, these materials are suitable for a wide range of applications. However, the ionic conductivity and electrochemical stability of these materials are not satisfactory. Thus, in this study, we reviewed the last 30 years of literature on organic-inorganic composite electrolytes from the Web of Science Core Collection database. Relevant data were then visualized using CiteSpace. In addition, important nodes in composite electrolyte development process and recent research hotspots were analyzed. The results demonstrate that research interest in composite electrolyte is increasing exponentially. The latest research focuses on the gel state, single-ion conductor structures, and polycarbonate-based materials. Interface is the key to the study of composite electrolytes and has been the most observable key word over the past five years. We found that future development of composite electrolytes should focus on (1) material selection and structure design of semisolid composite electrolyte, (2) interface structures and transport mechanisms between different phases in the electrolyte, and (3) a stable and elastic SEI/CEI film was constructed between an electrolyte and electrode.

Key words: lithium ion battery, composite electrolyte, visual analysis, CiteSpace

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