期刊
ADVANCED FUNCTIONAL MATERIALS
卷 31, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202008586
关键词
composite polymer separators; ionic conductivity; lithium‐ based secondary batteries; polymeric electrolytes; self‐ assembly
类别
资金
- National Research Foundation of Korea Grant - Korean Government (MEST) [NRF 2018M3D1A1058624]
- Korea Research Fellowship program - Ministry of Science and ICT through National Research Foundation of Korea [2019H1D3A1A02071097]
- National Natural Science Foundation of China [52020105012]
- National Research Foundation of Korea [2019H1D3A1A02071097] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Recent developments in solid electrolytes as replacements for conventional liquid electrolytes in lithium-based batteries face challenges due to low Li-ion conductivity and poor mechanical properties. Hierarchitectural and composite polymer separators based on electrolyte membranes are seen as promising solutions to achieve high ionic conductivity and mechanical stability in this field.
Recently, stringent requirements brought on by environmental regulations and safety issues are driving the development of solid electrolytes to replace conventional liquid electrolyte systems for lithium-based secondary batteries (LiBs). However, the low Li-ion conductivity and/or poor mechanical properties of electrolytes remain the main obstacles hindering their commercialization. Hierarchitectural and composite polymer separators (CPSs) based on electrolyte membranes have been reported as promising tools for both high ionic conductivity and mechanical stability. In light of such work, the new types of flexible electrolytes based on phase-separated and mixed-phase morphologies achieved via self-assembly and the use of functional molecular composites are reviewed along with the fundamental mechanisms associated with such systems. In particular, the structure and morphology, ionic conductivity, thermal/mechanical stability, and fabrication of polymer electrolytes are introduced. Additionally, recent advancements in CPSs including methods of ensuring low interfacial resistance, the respective contributions of these critical factors to the significant functional properties of CPSs, and directions for development and essential applications in the field of CPSs for LiBs are presented. Based on previous works, the perspectives put forth will aid in the design of advanced electrolytes for practical Li secondary batteries in the near future.
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