期刊
Advanced Materials
标题
Electrochemically and Thermally Stable Inorganics–Rich Solid Electrolyte Interphase for Robust Lithium Metal Batteries
作者
Xin-Bing Cheng, Shi-Jie Yang, Zaichun Liu, Jia-Xin Guo, Feng-Ni Jiang, Feng Jiang, Xiaosong Xiong, Wen-Bo Tang, Hong Yuan, Jia-Qi Huang, Yuping Wu, Qiang Zhang
摘要
evere dendrite growth and high-level activity of the lithium metal anode lead to a short life span and poor safety, seriously hindering the practical applications of lithium metal batteries. With a trisalt electrolyte design, an F-/N-containing inorganics–rich solid electrolyte interphase on a lithium anode is constructed, which is electrochemically and thermally stable over long-term cycles and safety abuse conditions. As a result, its Coulombic efficiency can be maintained over 98.98% for 400 cycles. An 85.0% capacity can be retained for coin-type full cells with a 3.14 mAh cm−2 LiNi0.5Co0.2Mn0.3O2 cathode after 200 cycles and 1.0 Ah pouch-type full cells with a 4.0 mAh cm−2 cathode after 72 cycles. During the thermal runaway tests of a cycled 1.0 Ah pouch cell, the onset and triggering temperatures were increased from 70.8 °C and 117.4 °C to 100.6 °C and 153.1 °C, respectively, indicating a greatly enhanced safety performance. This work gives novel insights into electrolyte and interface design, potentially paving the way for high-energy-density, long-life-span, and thermally safe lithium metal batteries.
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