期刊
JOURNAL OF POWER SOURCES
卷 477, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.228694
关键词
Lithium metal anode; Artificial protective membrane; Lithium dendrite; Lithium-ion deposition regulation; Cyclic stability
资金
- Natural Science Foundation of China [51802122]
- Frontier Application Research Foundation of Wuhan [2018010401011285]
- 4th Yellow Crane Talent Programme [08010004]
- Achievements Transformation Project of Academicians in Wuhan [2018010403011341]
- China Scholarship Council [201808420401]
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, Jianghan University [JDGD-201811]
To construct highly stable Lithium (Li) metal batteries (LMBs), a polyurethane-LiF based artificial protective membrane (APM) is evenly coated onto LM anodes by a facile solution casting method. Owning to the good ionic conductivity and mechanical properties, APM acts as a physical protective isolation layer between electrolytes and LM to alleviate electrolyte decomposition and suppress Li dendrites. By applying the APM modification, the electrochemical performance of LM is dramatically improved. The Li vertical bar APM-Cu half-cell stably circulates 120 cycles with a high Coulombic efficiency of above 90% at a current density of 1 mA cm(-2) and an area capacity of 1 mAh cm(-2). The APM-Li based symmetric cell presents an ultralong life span of over 1500 hat an area capacity of 1 mAh cm(-2 )and a current density of 0.5 mA cm(-2). In full-cell tests, the APM-Li vertical bar LiFePO4 configuration maintains a high specific capacity of 120.4 mAh g(-1) after 600 cycles with a superior capacity retention of 97.3% at 2C. Additionally, the extraordinary cyclability of APM-Li vertical bar Li(4)Ti(5)O(12 )full-cell demonstrates the effectiveness and versatility of APM. The scanning electron microscopy studies confirm the APM's suppression effects of Li dendrites. Therefore, this work provides a promising and affordable APM modification strategy to redeem highly stable LMBs.
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