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长周期Zn-空气电池在高深度放电时,由一个强大的Zn-dioxide电解质接口实现

Jinxian Wang¹, Danni Deng¹, Yuchao Wang¹

¹State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China. lypkd@163.com.

Chemical communications (Cambridge, England)

|October 16, 2023

概括

固态空气电池 (ZAB) 在更高的放电深度 (DOD) 显示出延长的循环寿命. 这项研究突出了酸电解质接口在实现先进ZAB应用程序的稳定性能方面发挥的关键作用.

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:

提高放电深度 (DOD) 对于提高空气电池 (ZAB) 的实用性至关重要.
现有的具有较长周期寿命的ZAB通常在非常低的DOD (<1%) 上运行,从而限制了它们的能量输出.
固态电解质可以提高ZAB的安全性和性能.

研究的目的:

为了研究各种排放深度 (DOD) 的固态ZAB的循环寿命.
评估ZABs中双功能氧气电催化剂 (Fe@BNC) 和基电解质接口的性能.
为了阐明基电解质接口稳定性对不同DOD的ZAB循环寿命的影响.

主要方法:

固态空气电池的制造和测试.
使用Fe@BNC作为双功能氧气电催化剂.
在不同的DOD条件下分析ZnCeleelectrolyte接口稳定性.

主要成果:

在3.2%的DOD (10 mA h cm-2) 实现了超过220小时的循环寿命.
使用Fe@BNC和一个强大的接口,在高DOD23.4% (72 mA h cm-2) 的情况下证明了120小时的循环寿命.
鉴定出不稳定的Zn气体电解质接口在高DOD加剧了树突的生长和不均的Zn沉积,减少了循环寿命.

结论:

具有先进的电催化剂和稳定的接口的固态ZAB可以在显著更高的DOD下实现长周期寿命.
基电解质接口的稳定性是限制ZAB在高DOD的性能的一个关键因素.
了解接口机制为设计下一代高性能ZAB提供了洞察力.

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