In Situ Polymerization of Ionic Liquid with Tunable Phase Separation for Highly Reversible and Ultralong Cycle Life Zn-Ion Battery,Nano Letters

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In Situ Polymerization of Ionic Liquid with Tunable Phase Separation for Highly Reversible and Ultralong Cycle Life Zn-Ion Battery
Nano Letters ( IF 9.6 ) Pub Date : 2022-11-04 , DOI: 10.1021/acs.nanolett.2c03421
Si Zheng ₁ , Licheng Wei ₁ , Zhaoyu Zhang ₁ , Jiageng Pan ₁ , Jiangfeng He ₁ , Liang Gao ₁ , Cheng Chao Li _{1,

2}

Affiliation

Severe Zn dendrite growth and side reactions greatly limit the application of aqueous zinc-ion batteries. Herein, we design a layer of polyionic liquid (PCAVImBr) film with a tunable pore size and charge density on the Zn anode to endow homogenized distribution of an electronic field, acerated Zn²⁺ permeation, and inhabitation of water entry. Such an optimal combination is achieved via a polymerization induced phase separation strategy, where the enhanced cross-linking density arrests the phase separation in a shallow depth and vice versa. Furthermore, the Zn@PCAVImBr electrode has good plating/stripping reversibility, which retains a 99.6% CE efficiency after 3000 cycles. The symmetric cells can achieve a cycle life of more than 2400 h at different current densities. It is worth mentioning that the NVO//Zn@PCAVImBr full cell can still reach a 91.2% capacity retention after nearly 4000 cycles at a high current of 10 A g^–1, and provides new insights for the future research of zinc-ion battery anodes.

中文翻译：

具有可调相分离的离子液体原位聚合用于高可逆和超长循环寿命的锌离子电池

严重的锌枝晶生长和副反应极大地限制了水系锌离子电池的应用。在此，我们在 Zn 阳极上设计了一层具有可调孔径和电荷密度的聚离子液体 (PCAVImBr) 薄膜，以赋予电子场均匀分布，激化 Zn ²⁺渗入和入水抑制。这种最佳组合是通过聚合诱导的相分离策略实现的，其中增强的交联密度阻止了浅层的相分离，反之亦然。此外，Zn@PCAVImBr 电极具有良好的电镀/剥离可逆性，在 3000 次循环后仍保持 99.6% 的 CE 效率。对称电池在不同电流密度下可实现超过2400小时的循环寿命。^{值得一提的是，NVO//Zn@PCAVImBr全电池在10 A g –1}的大电流下经过近4000次循环后仍能达到91.2%的容量保持率，为未来锌离子电池的研究提供了新的思路。阳极。

更新日期：2022-11-04

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