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Controlling Dendrite Growth in Solid-State Electrolytes
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-02-20 , DOI: 10.1021/acsenergylett.9b02660
He Liu 1, 2 , Xin-Bing Cheng 3 , Jia-Qi Huang 1, 2 , Hong Yuan 1 , Yang Lu 3 , Chong Yan 1 , Gao-Long Zhu 3, 4 , Rui Xu 1 , Chen-Zi Zhao 3 , Li-Peng Hou 3 , Chuanxin He 4 , Stefan Kaskel 5, 6 , Qiang Zhang 3
Affiliation  

Solid-state electrolytes (SSEs) are widely considered as an “enabler” to inhibit dendrite growth of lithium-metal anodes for high-energy and highly safe next-generation batteries. However, recent studies demonstrated that lithium dendrites form in working SSEs. Theoretically, dendrite inhibition can be achieved in perfect SSEs without any defects, while dendrite growth is extensively observed in practical SSEs with poor interface stability, large grain boundaries, voids, and partial electronic conductivity. In this Review, dendrite growth behaviors in SSEs, including polymer and inorganic electrolytes, are comprehensively summarized. The observed dendrite morphology in these SSEs, possible formation mechanisms, and some solutions are analyzed. Clear perspectives and some suggestions are also presented for the further development of SSEs in lithium-metal batteries. This Review intends to shed fresh light on the understanding of dendrite growth in SSEs and the rational design of the architecture and materials for SSEs matching the lithium-metal anode.

中文翻译:

控制固态电解质中的枝晶生长

固态电解质(SSE)被广泛认为是抑制高能量和高度安全的下一代电池的锂金属阳极枝晶生长的“促进剂”。但是,最近的研究表明,锂树枝状晶体在工作的SSE中形成。从理论上讲,可以在完美的SSE中实现枝晶抑制,而没有任何缺陷,而在界面稳定性差,晶界大,空洞和部分电子导电性差的实用SSE中,广泛观察到枝晶生长。在这篇综述中,全面总结了包括聚合物和无机电解质在内的SSE中的枝晶生长行为。分析了这些SSE中观察到的枝晶形态,可能的形成机理以及一些解决方案。还提出了清晰的观点和一些建议,以进一步发展锂金属电池中的SSE。这篇综述旨在为理解SSE中枝晶的生长以及与锂金属阳极匹配的SSE的结构和材料的合理设计提供新的认识。
更新日期:2020-02-20
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