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混合聚合物-合金-化物间相使低温金属电池的快速离子运输动力学成为可能

Yuanjian Li^1,2, Eryang Mao¹, Zhiwen Min³

¹Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P. R. China.

|September 28, 2023

概括

研究人员开发了一种新的混合聚合物-合金-化物介面相,以提高金属电池在低温下的性能. 这种设计增强了离子传输,使得稳定,无树的阳极可用于可靠的低温能量存储.

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:

低温金属电池对于寒冷的气候至关重要.
在Li金属阳极的缓慢Li+运输阻碍了低温性能.
目前的策略通常集中在电解质工程上.

研究的目的:

提出和演示一个功能性相间设计,以改善低温金属阳极动力学.
为了克服在零度以下温度下缓慢离子运输的局限性.
开发用于寒冷气候应用的高性能金属电池.

主要方法:

在聚合物矩阵中设计了一种混合聚合物合金化物 (PAF) 交相,其中含有渐变化纳米粒子.
进行了系统的实验和理论研究.
在低温下 (-40°C和-20°C) 制造和测试金属对称电池和全电池.

主要成果:

这种PAF介相表现出优越的化性,并促进了快速,均的Li+运输.
在-40°C下,PAF-Li阳极表现出720小时的稳定循环,低压歇斯底里,没有树突.
完整电池在-150个循环后在-20°C下达到4.26 mAh cm-2的容量和74.7%的保留率.

结论:

功能界相设计概念有效地加速了界面离子转移动力学.
这种方法为开发高面积容量,寿命长的低温运行金属电池提供了创新的见解.
在PAF的相间阶段代表了一个有前途的战略,使可靠的冷气候储能解决方案.

关键词:

快速的离子运输可以实现.具有高面积容量的地区.金属电池的金属电池是什么低温低温的低温是一个问题.聚合物-合金-化物相间阶段

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