Jin-Lin Yang , Peihua Yang , Tao Xiao , Hong Jin Fan
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引用次数: 0
摘要
可充电锌水溶液电池(AZBs)存在大量锌枝晶和有害的寄生氢演化腐蚀问题,这些问题阻碍了 AZBs 的广泛应用。为了解决这些问题,必须对水电解质进行工程设计,以实现单离子传导。单离子传导电解质(SICE)的主要目的是在尽量不牺牲离子传导性(σ)的情况下提高阳离子转移数(t)。SICE 可最大限度地降低离子浓度梯度,同时通过抑制阴离子的流动性来抑制松散的去质子氧化物钝化,从而有效缓解枝晶的形成。这一观点概括了 SICE 的基本原理和最新进展。我们提出了在贫水条件下打破 t 和 σ 之间权衡的思路。我们还对锌离子转移数的测试方法进行了深入探讨。本视角的主要目的是阐明如何进一步开发 SICE,以提高 AZB 的能量密度和寿命。
Designing single-ion conductive electrolytes for aqueous zinc batteries
Rechargeable aqueous zinc batteries (AZBs) suffer from rampant Zn dendrites and detrimental parasite hydrogen evolution corrosion, which impede the broad implementation of AZBs. To address these issues, it is imperative and significant to engineer the aqueous electrolytes to render single-ion conduction. The key aim for single-ion conductive electrolytes (SICEs) is to improve the cation transference number (t) with minimum sacrifice of ionic conductivity (σ). SICEs render the opportunity to effectively mitigate dendrite formation by minimizing ion concentration gradients and concurrently suppressing the loose deprotonated oxide species passivation through the restrained mobility of anions. This perspective encapsulates the fundamental principles and recent progress of SICEs. We suggest ideas for breaking the trade-off between t and σ under lean-water conditions. The testing methods for zinc ion transference numbers are also critically discussed. The primary objective of this perspective is to shed light on further development of SICEs to foster the energy density and lifespan of AZBs.
期刊介绍:
Matter, a monthly journal affiliated with Cell, spans the broad field of materials science from nano to macro levels,covering fundamentals to applications. Embracing groundbreaking technologies,it includes full-length research articles,reviews, perspectives,previews, opinions, personnel stories, and general editorial content.
Matter aims to be the primary resource for researchers in academia and industry, inspiring the next generation of materials scientists.