Exploring multi-segment electrolyte design strategies for portable high-energy aqueous batteries

Kaiqiang Zhang, Changlong Ma, Zijie Yuan, Pei Kong, Jilei Ye, Yuping Wu

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2 引用 (Scopus)

摘要

The limited energy density resulting from the suppressed operating voltage of aqueous batteries presents a significant challenge when it comes to practical applications. To address this issue, various strategies have been proposed to expand the electrochemical potential window of aqueous electrolytes, with a primary focus on inhibiting the hydrogen and oxygen evolution. It is crucial to note that these reactions are closely linked to the pH values. Consequently, adopting a pH design that decouples the acidity of anolyte and basicity of catholyte proves to be advantageous in overcoming the thermodynamic limitations associated with water decomposition and achieving a wider electrochemical stability window. Fortunately, this approach of bipolarized pH values optimizes the redox potentials at anode and cathode, resulting in a lower anodic potential and a higher cathodic potential. This optimization leads to an increase in battery's working voltage. Embracing this concept holds great promises for developing portable high-energy aqueous batteries, thus facilitating their practical applications. In this review, we delve into the research surrounding this innovative electrolyte engineering technology. We aim to provide a clear definition, highlight its efficacy, addressing any remaining challenges, propose potential solutions, and present a roadmap for the portable implementation of multi-segment electrolyte technology.

源语言英语
文章编号111658
期刊Journal of Energy Storage
88
DOI
出版状态已出版 - 30 5月 2024

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