一种抗枝晶锌空气电池。

A Dendrite-Resistant Zinc-Air Battery.

作者信息

Huang Shangwei, Li Hui, Pei Pucheng, Wang Keliang, Xiao Yu, Zhang Chao, Chen Chen

机构信息

State Key Lab. of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China.

Department of Chemistry, Tsinghua University, Beijing 100084, China.

出版信息

iScience. 2020 Jun 26;23(6):101169. doi: 10.1016/j.isci.2020.101169. Epub 2020 May 16.

DOI:10.1016/j.isci.2020.101169

PMID:32480127

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7262559/

Abstract

Zinc-air batteries (ZABs) have drawn widespread attention for their high energy densities, abundant raw materials, and low cost. However, the issues of metal dendrite formation and air electrode failure have been impeding the development and application of ZABs. Herein, we designed a novel dendrite-resistant ZAB system by adopting multiphase electrolytes to conduct the zinc deposition and the oxygen evolution reaction. The oxygen reduction reaction electrode is kept out of the zinc deposition region to extend the lifespan. The ZABs show an energy density of 1,050.9 Wh kg based on the mass of zinc consumption, with an average Coulombic efficiency of ∼97.4% in 2,000 h discharge and charge cycling. More impressively, even if a short circuit occurs while charging, the battery can maintain the cycle performance without irreversible failure, which is conducive to the reliability of battery modules and its application in other energy storage/conversion devices.

摘要

锌空气电池（ZABs）因其高能量密度、丰富的原材料和低成本而受到广泛关注。然而，金属枝晶形成和空气电极失效问题一直阻碍着锌空气电池的发展和应用。在此，我们通过采用多相电解质来进行锌沉积和析氧反应，设计了一种新型的抗枝晶锌空气电池系统。氧还原反应电极被置于锌沉积区域之外，以延长电池寿命。基于锌消耗的质量，该锌空气电池的能量密度为1050.9 Wh/kg，在2000小时的充放电循环中平均库仑效率约为97.4%。更令人印象深刻的是，即使在充电时发生短路，电池也能保持循环性能而不会出现不可逆故障，这有利于电池模块的可靠性及其在其他储能/转换设备中的应用。