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。
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 typi
作者
刘元凯
余涛
郭少华
周豪慎
Yuankai Liu;Tao Yu;Shaohua Guo;Haoshen Zhou(College of Engineering and Applied Sciences,Nanjing University,Nanjing 210023,China;Shenzhen Research Institute of Nanjing University,Shenzhen 518000,Guangdong Province,China)
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2023年第8期90-114,共25页
Acta Physico-Chimica Sinica
基金
国家重点研发计划项目(2021YFA1202300)
国家自然科学基金(22239002,22075132)
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,JCYJ20210324123002008,2021Szvup055)
广东省先进储能材料重点实验室开放基金(aesm2021xx)资助。
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
Sulfide solid electrolyte
All-solid-state battery
Interface modification
Membrane-forming technology
Pouch cell
