Journal
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
Volume 28, Issue 10, Pages 1565-1583Publisher
SPRINGER
DOI: 10.1007/s12613-020-2239-1
Keywords
all solid-state lithium-ion batteries; garnet-structured LLZO electrolytes; interfacial compatibility; polymer-ceramic composite electrolytes
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Funding
- National Natural Science Foundation of China [21701083, 51801078]
- Zhenjiang Key Laboratory of Marine Power Equipment Performance [SS2018006]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province, China [SJCX19_0612, KYCX20_3137]
- Project of Jiangsu University (High-Tech Ship) Collaborative Innovation Center [2019, 1174871801-11]
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This review summarizes recent developments on garnet-structured LLZO solid-state electrolytes, highlighting both their advantages and limitations. The review covers preparation methods, element doping, structure, stability, and interfacial improvement, while also providing future perspectives for these materials. This comprehensive overview expands understanding of advanced solid garnet electrolytes and offers guidance for the commercialization of ASSLIBs.
All-solid-state Li-ion batteries (ASSLIBs) have been widely studied to achieve Li-ion batteries (LIBs) with high safety and energy density. Recent reviews and experimental papers have focused on methods that improve the ionic conductivity, stabilize the electrochemical performance, and enhance the electrolyte/electrode interfacial compatibility of several solid-state electrolytes (SSEs), including oxides, sulfides, composite and gel electrolytes, and so on. Garnet-structured Li7La3Zr2O12 (LLZO) is highly regarded an SSE with excellent application potential. However, this type of electrolyte also possesses a number of disadvantages, such as low ionic conductivity, unstable cubic phase, and poor interfacial compatibility with anodes/cathodes. The benefits of LLZO have urged many researchers to explore effective solutions to overcome its inherent limitations. Herein, we review recent developments on garnet-structured LLZO and provide comprehensive insights to guide the development of garnet-structured LLZO-type electrolytes. We not only systematically and comprehensively discuss the preparation, element doping, structure, stability, and interfacial improvement of LLZOs but also provide future perspectives for these materials. This review expands the current understanding on advanced solid garnet electrolytes and provides meaningful guidance for the commercialization of ASSLIBs.
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