期刊
MATERIALS TODAY ENERGY
卷 26, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mtener.2022.100984
关键词
Lithium metal anode; Dual-function additive; In-situ gelation; Cycling stability; Alloy interphase
资金
- Natural Science Foundation of China [22022813, 21878268]
- National Key R&D Program of China [2018YFA0209600]
- Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang [2019R01006]
This study reports the in-situ fabrication of poly(1,3-dioxolane) gel polymer electrolyte and a Li-Sn alloy anode interphase by introducing a dual-function electrolyte additive, tin trifluoromethanesulfonate (Sn(OTf)(2)), into DOL-based electrolyte. The formed quasi-solid LMB shows low internal resistance, robust and compatible interface, and satisfying thermal, mechanical, and electrochemical stability.
As a promising choice of next-generation energy storage system, high-energy lithium metal batteries (LMBs) are facing degradation and safety problems mainly caused by undesired side reactions and growth of lithium dendrite. Thus, electrode design, modification of electrode interphase and electrolyte have therefore become key issues for future LMBs. Herein, we report that introducing a dual-function electrolyte additive, tin trifluoromethanesulfonate (Sn(OTf)(2)), into DOL-based electrolyte can in-situ fabricate poly(1,3-dioxolane) gel polymer electrolyte and a Li-Sn alloy anode interphase. The formed quasi-solid LMB utilizing various cathodes, including LiFePO4, sulfide, and LiCoO2, presents low internal resistance, robust and compatible interface as well as satisfying thermal, mechanical, and electrochemical stability even in air. This work provides a facile and accessible approach to manufacture qualified quasi-solid LMBs with improved safety and elongated lifetime. (c) 2022 Elsevier Ltd. All rights reserved.
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