当前位置:科学网首页 > 小柯机器人 >详情
一种高稳定性、高柔韧性的沸石电解质固态Li-空气电池
作者:小柯机器人 发布时间:2021/4/25 13:47:51

中国吉林大学于吉红团队研制了一种高稳定性和柔性的沸石电解质固态锂空气电池。相关研究成果于2021年4月21日发表于国际一流学术期刊《自然》。

固态锂(Li)-空气电池被公认为下一代储能解决方案,以解决液体电池系统中遇到的安全性和电化学稳定性问题。然而,传统的固体电解质由于其对锂金属和/或空气的不稳定性以及低电阻界面的构建困难,不适合用于固态锂-空气系统。

该文介绍了一种集成的固态锂空气电池,它包含一个超薄的、高离子导电性的锂离子交换X沸石(LiX)膜作为唯一的固体电解质。使用原位组装策略,该电解质与锂集成在一起作为负极,碳纳米管作为正极。沸石固有的化学稳定性有效地抑制了电解质在锂或空气的作用下而引起的退化。该电池每克碳纳米管的容量为12020毫安时,在每克500毫安的电流密度和每克1000毫安时的容量下,电池的循环寿命为149个循环。

在相同条件下,这种循环寿命比锂铝锗磷酸盐电池(12次循环)和有机电解质电池(102次循环)的循环寿命长。沸石基锂空气电池的电化学性能、灵活性和稳定性赋予了实用性,可扩展到其他储能系统,如锂离子电池、钠空气电池和钠离子电池。

附:英文原文

Title: A highly stable and flexible zeolite electrolyte solid-state Li–air battery

Author: Xiwen Chi, Malin Li, Jiancheng Di, Pu Bai, Lina Song, Xiaoxue Wang, Fei Li, Shuang Liang, Jijing Xu, Jihong Yu

Issue&Volume: 2021-04-21

Abstract: Solid-state lithium (Li)–air batteries are recognized as a next-generation solution for energy storage to address the safety and electrochemical stability issues that are encountered in liquid battery systems1,2,3,4. However, conventional solid electrolytes are unsuitable for use in solid-state Li–air systems owing to their instability towards lithium metal and/or air, as well as the difficulty in constructing low-resistance interfaces5. Here we present an integrated solid-state Li–air battery that contains an ultrathin, high-ion-conductive lithium-ion-exchanged zeolite X (LiX) membrane as the sole solid electrolyte. This electrolyte is integrated with cast lithium as the anode and carbon nanotubes as the cathode using an in situ assembly strategy. Owing to the intrinsic chemical stability of the zeolite, degeneration of the electrolyte from the effects of lithium or air is effectively suppressed. The battery has a capacity of 12,020 milliamp hours per gram of carbon nanotubes, and has a cycle life of 149 cycles at a current density of 500 milliamps per gram and at a capacity of 1,000 milliamp hours per gram. This cycle life is greater than those of batteries based on lithium aluminium germanium phosphate (12 cycles) and organic electrolytes (102 cycles) under the same conditions. The electrochemical performance, flexibility and stability of zeolite-based Li–air batteries confer practical applicability that could extend to other energy-storage systems, such as Li–ion, Na–air and Na–ion batteries.

DOI: 10.1038/s41586-021-03410-9

Source: https://www.nature.com/articles/s41586-021-03410-9

期刊信息

Nature:《自然》,创刊于1869年。隶属于施普林格·自然出版集团,最新IF:42.778
官方网址:http://www.nature.com/