一种溶液到固体的转换化学方法使得酸电池能够超快充,寿命长,化盐的电池具有超快充和超长寿命
Jiashen Meng1, Xuhui Yao2, Xufeng Hong1
1Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, School of Materials Science and Engineering, Peking University, Beijing, 100871, China.
Nature communications
|July 3, 2023
概括
研究人员开发了新的可充电电池 (RAB),使用一种新的溶液到固体转化化学方法. 这种方法克服了传统阴极的局限性,允许快速充电和延长储能周期寿命.
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:
- 电池中的常规固体转化阴极面临着诸如缓慢的动力学,体积变化和降解等挑战.
- 可充电电池 (RAB) 对储能具有前景,但受到阴极性能限制的阻碍.
研究的目的:
- 引入一类新的高容量氧化还原对,用于RAB阴极,利用溶液到固体转换化学.
- 展示一种新的阴极机制,使可充电电池能够快速充电,寿命长.
主要方法:
- 研究了使用盐电解质进行阴极发展的溶液-固体转换化学.
- 使用特定的化 (InCl/InCl3) 氧化还原对作为新阴极机制的概念验证.
主要成果:
- 在150°C时达到大约327mAhg-1的高容量,最小的超电位 (35mV在1C) 在150°C时.
- 证明了极好的循环稳定性,其容量可以忽略不计,在20C时超过500个循环时会消失,在50C时持续100mAhg-1 .
- 由于溶液相的快速氧化动力学,观察到超快速充电,以及通过溶液相的再形成自愈的长期稳定性.
结论:
- 溶液到固体的转换机制为开发先进的可充电电池提供了可行的途径.
- 这种方法克服了动力和稳定性问题,为具有成本效益的多价值电池阴极铺平了道路.
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