Eutectic-electrolyte-enabled zinc metal batteries towards wide temperature and voltage windows,Energy & Environmental Science

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Eutectic-electrolyte-enabled zinc metal batteries towards wide temperature and voltage windows
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2024-08-30 , DOI: 10.1039/d4ee02816c
Xue Bai _{1,

2} , Mingzi Sun ₃ , Jun Yang ₁ , Bijian Deng ₄ , Kai Yang ₁ , Bolong Huang ₃ , Weiguo Hu _{1,

2} , Xiong Pu _{1,

2}

Affiliation

Zinc metal batteries (ZMBs) are highly promising devices for large-scale energy storage applications. However, the commonly used aqueous electrolyte often leads to issues such as hydrogen evolution, narrow temperature range, and dendrite growth, significantly limiting electrochemical and thermal windows of ZMBs. Here, we report a nonflammable deep eutectic electrolyte (DEE), achieving wide electrochemical (3.0 V vs. Zn/Zn²⁺) and thermal-stability (−70 °C to 160 °C) windows. Benefiting from these characteristics, DEE contributes to promoting the small and compact Zn nucleation, eliminating hydrogen evolution, and generating a robust organic–inorganic-coupled solid–electrolyte interphase, reaching sustained Zn plating/stripping performance in Zn–Zn symmetric cells and Zn–V₂O₅ cells. More importantly, DEE enables ZMBs to be cycled in a wide temperature range of −20 °C to 80 °C, exceeding most aqueous electrolytes in high-temperature range. Furthermore, we demonstrate the potential of DEE for high-voltage cells with Zn-ion capacitors cycled up to 2.5 V. Our findings provide insightful understandings of the Zn plating/stripping chemistry in organic coordination environments and a practical stable electrolyte with wide temperature and electrochemical windows.

中文翻译：

共晶电解质锌金属电池实现宽温度和电压窗口

锌金属电池（ZMB）是用于大规模储能应用的非常有前途的设备。然而，常用的水性电解质常常会导致析氢、温度范围窄和枝晶生长等问题，严重限制了 ZMB 的电化学和热窗口。在这里，我们报告了一种不可燃的深共晶电解质（DEE），实现了宽电化学（3.0 V vs. Zn/Zn ²⁺ ）和热稳定性（−70 °C 至 160 °C）窗口。受益于这些特性，DEE 有助于促进小而紧凑的 Zn 成核，消除氢析出，并产生强大的有机-无机耦合固体-电解质界面，在 Zn-Zn 对称电池和 Zn- 中实现持续的镀锌/剥离性能。 V ₂ O ₅电池。更重要的是，DEE使ZMB能够在-20°C至80°C的宽温度范围内循环，超过了大多数水性电解质的高温范围。此外，我们展示了 DEE 在具有循环高达 2.5 V 的锌离子电容器的高压电池中的潜力。我们的研究结果提供了对有机配位环境中的镀锌/剥离化学以及具有宽温度和电化学性能的实用稳定电解质的深刻理解。视窗。

更新日期：2024-08-30

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