物理化学学报 >> 2023, Vol. 39 >> Issue (8): 2301027.doi: 10.3866/PKU.WHXB202301027

所属专题： 固态电池

综述 上一篇    

高性能硫化物基全固态锂电池设计：从实验室到实用化

刘元凯1,2, 余涛1,2, 郭少华1,2,*(), 周豪慎1,*()   

  1. 1 南京大学现代工程与应用科学学院, 南京 210023
    2 南京大学深圳研究院, 广东 深圳 518000
  • 收稿日期:2023-01-16 录用日期:2023-02-13 发布日期:2023-03-23
  • 通讯作者: 郭少华,周豪慎 E-mail:shguo@nju.edu.cn;hszhou@nju.edu.cn
  • 基金资助:
    国家重点研发计划项目(2021YFA1202300);国家自然科学基金(22239002);国家自然科学基金(22075132);江苏省碳达峰碳中和科技项目(BK20220034);江苏省自然科学基金(BK20211556);深圳市科技创新委员会(RCYX20200714114524165);深圳市科技创新委员会(JCYJ20210324123002008);深圳市科技创新委员会(2021Szvup055);广东省先进储能材料重点实验室开放基金(aesm2021xx)

Designing High-Performance Sulfide-Based All-Solid-State Lithium Batteries: From Laboratory to Practical Application

Liu Yuankai1,2, Yu Tao1,2, Guo Shaohua1,2,*(), Zhou Haoshen1,*()   

  1. 1 College of Engineering and Applied Sciences, Nanjing University, Nanjing 210023, China
    2 Shenzhen Research Institute of Nanjing University, Shenzhen 518000, Guangdong Province, China
  • Received:2023-01-16 Accepted:2023-02-13 Published:2023-03-23
  • Contact: Guo Shaohua, Zhou Haoshen E-mail:shguo@nju.edu.cn;hszhou@nju.edu.cn
  • Supported by:
    The project was supported by the National Key R&D Program of China(2021YFA1202300);the National Natural Science Foundation of China(22239002);the National Natural Science Foundation of China(22075132);the Science and Technology Innovation Fund for Emission Peak and Carbon Neutrality of Jiangsu Province(BK20220034);the Natural Science Foundation of Jiangsu Province, China(BK20211556);the Shenzhen Science and Technology Innovation Committee(RCYX20200714114524165);the Shenzhen Science and Technology Innovation Committee(JCYJ20210324123002008);the Shenzhen Science and Technology Innovation Committee(2021Szvup055);the Open Fund of the Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials(aesm2021xx)

RichHTML

122

PDF

2760

赞

摘要：

全固态锂电池因其优异的安全性和高能量密度成为储能领域的重点研究内容。硫化物电解质因其高离子电导率、良好电极/电解质界面兼容性及易加工性，有力推动了硫化物基全固态锂电池的发展。本文首先从实验室研究阶段出发，从正极/电解质界面、硫化物电解质自身及负极/电解质界面三方面阐述了硫化物基全固态锂电池现阶段面临的主要问题，并介绍了相关的解决策略。随后从硫化物基全固态锂电池的实用化生产角度出发，介绍了电极/电解质膜的制膜工艺、软包电池的装配相关问题、高载正极的设计及硫化物电解质的大规模、低成本制备。最后展望了硫化物基全固态锂电池的未来研究方向和发展趋势。

关键词: 硫化物固态电解质, 全固态电池, 界面改性, 制膜工艺, 软包电池

Abstract:

All-solid-state lithium batteries (ASSB) have emerged as key components in energy storage applications owing to their superior safety characteristics and high energy density. The use of sulfide solid electrolytes has considerably promoted the development of all-solid-state lithium batteries because of advantages such as a high ionic conductivity, formability, and good interface compatibility with electrodes. In this review, we first discuss the issues hindering the use of sulfide-based all-solid-state lithium batteries, focusing on aspects related to the cathode/electrolyte interface, sulfide solid electrolytes, and the anode/electrolyte interface. At the cathode/electrolyte interface, interfacial side reactions inherently occur due to the narrow electrochemical window of sulfide electrolytes when used with high-voltage cathode materials, which degrades the battery performance. In addition, owing to the chemical potential difference between cathode materials and sulfide solid electrolytes, the space-charge layer generated due to the formation of a lithium depletion layer is also detrimental to the cell performance. To overcome these difficulties, inert coatings, replacing sulfide solid electrolytes with halide solid electrolytes, and replacing frequently used transitional metal oxide cathode materials with other materials that are better suited for sulfide solid electrolytes to modify the composite cathode have been explored. Improvements in the ionic conductivity and air stability are imperative for sulfide solid electrolytes. Strategies to optimize the solid electrolyte have mainly focused on doping or adjusting the synthesis routes of the sulfide solid electrolyte, which have resulted in notable improvements. At the anode/electrolyte interface, lithium dendrite formation and interfacial reactions between lithium metal and the sulfide solid electrolyte are the most notable challenges. Using artificial solid electrolyte interfaces with a low electronic conductivity, employing an alloy anode, and synthesizing composite electrolytes are typical approaches for overcoming these problems. In addition, from the perspective of the practical production of sulfide-based all-solid-state lithium batteries, electrode/electrolyte membrane-forming technology and the assembly of pouch cells are introduced. Membrane-forming technology has gained extensive attention with the aim of fabricating thin and mechanically stronger solid electrolyte membranes. High-loading cathode membranes as well as solid electrolyte membranes, dry processing, and wet processing are reviewed. Moreover, the improvement in the solid-solid contact of pouch cells, the design of high-loading cathodes, and the low-cost and scaled up production of sulfide solid electrolytes are introduced. Finally, we also propose research directions and future development trends for sulfide-based all-solid-state lithium batteries.

Key words: Sulfide solid electrolyte, All-solid-state battery, Interface modification, Membrane-forming technology, Pouch cell