Poloxamer Pre-solvation Sheath Ion Encapsulation Strategy for Zinc Anode–Electrolyte Interfaces,ACS Energy Letters

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Poloxamer Pre-solvation Sheath Ion Encapsulation Strategy for Zinc Anode–Electrolyte Interfaces
ACS Energy Letters ( IF 19.3 ) Pub Date : 2023-12-21 , DOI: 10.1021/acsenergylett.3c02337
Kai Yang ₁ , Hao Fu ₂ , Yixue Duan ₃ , Zhihao Ma ₁ , Dong Wang ₁ , Bolong Li ₁ , Ho Seok Park _{2,

4,

5,

6} , Derek Ho _{1,

7}

Affiliation

Aqueous metal-ion batteries are considered next-generation energy storage devices with improved safety. However, they suffer from sluggish kinetics and side reactions. This work presents a zinc-ion encapsulation strategy based on the poloxamer pre-solvation sheath for the realization of efficient zinc anode–electrolyte interfaces. The poloxamers can reversibly self-assemble into a pre-solvation sheath by electron-donating effect and effectively shield the ions from the surrounding water. This also lowers the activation energy of desolvation, endowing promoted transference and reaction kinetics. Accordingly, the Zn||Zn cell with the poloxamer electrolyte (Polo-ZnSO₄) achieved over 2000 h cycles at 5 mA cm^–2 and even over 500 h cycles at 10 mA cm^–2. The Zn||MnO₂ battery delivers a high and stable capacity of 240.9 mAh g^–1 after 1000 cycles at 1 A g^–1. This work paves the way for use of encapsulation chemistry for advanced aqueous metal batteries with high Coulombic efficiency and long lifetime.

中文翻译：

锌阳极-电解质界面的泊洛沙姆预溶剂化鞘离子封装策略

水系金属离子电池被认为是安全性更高的下一代储能装置。然而，它们存在动力学缓慢和副反应的问题。这项工作提出了一种基于泊洛沙姆预溶剂化鞘的锌离子封装策略，用于实现高效的锌阳极-电解质界面。泊洛沙姆可以通过给电子效应可逆地自组装成预溶剂化鞘，并有效地屏蔽离子与周围水的接触。这也降低了去溶剂化的活化能，从而促进了转移和反应动力学。_{因此，采用泊洛沙姆电解质（Polo-ZnSO 4} ）的Zn||Zn电池在5 mA cm ^–2下实现了超过2000小时的循环，甚至在10 mA cm ^–2下实现了超过500小时的循环。Zn||MnO ₂电池在1 A g ^{–1下循环1000次后可提供240.9 mAh g}^–1的高且稳定的容量。这项工作为利用封装化学技术开发具有高库仑效率和长寿命的先进水性金属电池铺平了道路。

更新日期：2023-12-21

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