超稳定的无树脂质金属电池由弱溶解电解质启用
Ping Gao1, Fei Zhang1, Xingchao Wang1
1State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources; Key Laboratory of Advanced Functional Materials, Autonomous Region; Institute of Applied Chemistry, College of Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, People's Republic of China.
ACS nano
|October 13, 2023
概括
研究人员开发了一种用于金属电池 (PMB) 的新型电解质,以防止树的生长并提高稳定性. 这一突破提高了电池的安全性和性能,为能源密集的PMB铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 金属阳极为金属电池 (PMB) 提供了丰富和低成本的优势.
- 然而,K金属阳极患有树突生长和寄生反应,导致循环能力差,库伦比效率 (CE) 低以及安全问题.
研究的目的:
- 为了应对PMB中的K金属阳极的挑战.
- 为先进的PMB开发一种稳定,高性能的电解质.
主要方法:
- 一种局部化的高度电解质 (LHCE) 是使用二 () 硫胺 (KFSI) 在1,2-二甲基乙烯 (DME) 和1,1,2,2,2-四乙烯-2,2,3,3-四烯乙烯 (TTE) 的辅溶剂中制成的.
- 研究了TTE稀释剂对电解质特性和K金属阳极行为的影响.
- 电化学性能被评估使用K ការ៉ាប៊ីសាឌីយ៉ាCu និងK ការ៉ាប៊ីសាឌីយ៉ាK对称的细胞,以及K ការ៉ាប៊ីសាឌីយ៉ាPrussian Blue全细胞.
主要成果:
- 通过LHCE,在800个循环中,KdakdakdakCu细胞的CE值为98%.
- 稳定循环超过2000小时,在0.1 mA cm−2.2.的对称细胞中实现了K
- 该LHCE与普鲁士蓝色阴极具有很好的兼容性,在100个周期的完整细胞中达到99%的CE.
结论:
- 开发的LHCE有效地抑制了K金属树的生长和寄生虫反应.
- 这种电解质设计显著提高了PMB的可循环,库伦比效率和安全性.
- 这些发现表明,实现高安全性和能源密度的PMB是一个有希望的途径.
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