低温无阳极金属电池 低温无阳极金属电池
Mengyao Tang1, Shuai Dong1, Jiawei Wang1
1School of Chemistry, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing, China.
Nature communications
|September 26, 2023
概括
这项研究引入了一种新的无阳极 (K) 金属电池,在低温下有效运行. 它实现了均的K沉积和高库伦比效率,使先进的储能解决方案能够获得高特异能.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 无阳极电池提供更高的能量密度,但面临的挑战是可逆金属/脱落,特别是在低温下.
- 不稳定的固体电解质间相和树突增长阻碍了传统无阳极系统的低温性能.
研究的目的:
- 开发一种低温无阳极 (K) 金属非水性电池,具有更好的可逆性和稳定性.
- 调查Si-O基添加剂在零度以下温度下对均K沉积的使用.
主要方法:
- 在一个弱溶解,低度的电解质 (0.4M KPF6在DME) 中利用聚二甲基 (一种基于Si-O的添加剂).
- 研究了K的存储电池,以评估K/剥离在-40°C的库伦比效率.
- 组装的无阳极 Cu 干部 预化 3,4,9,10-ylene-tetracarboxylicacid-dianhydride 全细胞用于性能测试.
主要成果:
- 由于局部形成的性接口,在-40°C下达到99.80%的平均K/剥离库伦比效率.
- 在完整的电池中证明了稳定的循环,在0.2°C和-40°C时具有高特异能152 Wh kg-1的高特异能.
- 这种基于SiO的添加剂有效地促进了均的K沉积,抑制了树的生长.
结论:
- 开发的低温无阳极K金属电池系统显示出对高性能能量存储的重大承诺.
- 在特定的电解质配方中使用基于Si-O的添加剂的策略是有效的,可以实现稳定高效的低温运行.
- 这项工作促进了无阳极性金属电池的可行性,用于极端环境中的实际应用.
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