Highly Entangled Hydrogel Enables Stable Zinc Metal Batteries via Interfacial Confinement Effect,ACS Energy Letters

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Highly Entangled Hydrogel Enables Stable Zinc Metal Batteries via Interfacial Confinement Effect
ACS Energy Letters ( IF 19.3 ) Pub Date : 2023-11-29 , DOI: 10.1021/acsenergylett.3c02139
Qiong He ₁ , Zhi Chang ₁ , Yue Zhong ₁ , Simin Chai ₁ , Chunyan Fu ₁ , Shuquan Liang ₁ , Guozhao Fang ₁ , Anqiang Pan _{1,

2}

Affiliation

Hydrogel electrolytes are expected to be useful for stable zinc metal batteries; however, it is extremely challenging to develop a hydrogel electrolyte that balances mechanical properties, ionic conductivity, and interface stability. Herein, we report a highly entangled hydrogel electrolyte that achieves pronounced mechanical properties (446 kPa tensile strength) and high ionic conductivity (3.93 mS cm^–1) by optimizing the dense reversible conformation of hydrophilic chains. Moreover, due to the interfacial confinement effect, the highly entangled hydrogel electrolyte enables a dynamically stabilized anode with a non-dendritic planar morphology. Thus, the zinc anode with this electrolyte system exhibits a long-term cycle stability of 6000 h at 0.5 mA cm^–2 and over 220 h at an impressive depth-of-discharge of 68.4%. This work provides an important concept for realizing practical high-performance wearable zinc–manganese batteries.

中文翻译：

高度缠结的水凝胶通过界面限制效应实现稳定的锌金属电池

水凝胶电解质有望用于稳定的锌金属电池；然而，开发一种平衡机械性能、离子电导率和界面稳定性的水凝胶电解质极具挑战性。在此，我们报道了一种高度缠结的水凝胶电解质，通过优化亲水链的致密可逆构象，该电解质具有显着的机械性能（446 kPa 拉伸强度）和高离子电导率（3.93 mS cm ^{–1 ）。}此外，由于界面限制效应，高度缠结的水凝胶电解质能够实现具有非树枝状平面形态的动态稳定阳极。^{因此，采用该电解质系统的锌阳极在 0.5 mA cm –2}下表现出 6000 小时的长期循环稳定性，在令人印象深刻的 68.4% 放电深度下表现出超过 220 小时的长期循环稳定性。这项工作为实现实用的高性能可穿戴锌锰电池提供了重要的概念。

更新日期：2023-11-29

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