Dissolution–Crystallization Transition within a Polymer Hydrogel for a Processable Ultratough Electrolyte,Advanced Materials

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Dissolution–Crystallization Transition within a Polymer Hydrogel for a Processable Ultratough Electrolyte
Advanced Materials ( IF 27.4 ) Pub Date : 2019-06-11 , DOI: 10.1002/adma.201900248
Junjie Wei ₁ , Gumi Wei ₁ , Yinghui Shang ₁ , Jie Zhou ₁ , Chu Wu ₁ , Qigang Wang ₁

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Although nonliquid electrolytes have been developed rapidly under the condition of safe demand of energy storage devices, the inherent weaknesses in ionic conductivity, mechanical properties, or interfacial compatibility severely hinder their application under a harsh environment. Inspired by the hybridized characteristics of composite materials and the potential advantages of hydrated crystals, a processable crystal‐type gel electrolyte with good comprehensive performance via the dissolution–crystallization transition of NaAc within hydrogel is creatively prepared. The use of NaAc crystal within a hydrogel leads to nearly 26 000 times greater modulus (474.24 MPa) and higher operating voltage (2.0 V) than the hydrogel without the crystal. The reliable supercapacitor using this electrolyte can work in extreme environment (−40 to 80 °C, even in the fire or in liquid nitrogen within a short time) benefiting from its phase‐transition capacity. This investigation offers a facile and versatile way to construct an ideal gel electrolyte for next‐generation energy storage devices.

中文翻译：

可加工的超韧电解质在聚合物水凝胶中的溶解-结晶转变

尽管非液体电解质在能量存储设备的安全需求下已经得到快速发展，但是离子电导率，机械性能或界面相容性的固有弱点严重阻碍了它们在恶劣环境下的应用。受复合材料杂交特性和水合晶体潜在优势的启发，创造性地制备了一种可加工的晶体型凝胶电解质，该电解质通过NaAc在水凝胶中的溶解-结晶转变而具有良好的综合性能。与没有晶体的水凝胶相比，在水凝胶中使用NaAc晶体可产生高出将近26 000倍的模量（474.24 MPa）和更高的工作电压（2.0 V）。使用这种电解质的可靠超级电容器可以在极端环境（−40至80°C，即使在短时间内在火中或在液氮中也能受益于其相变能力。这项研究为构建适用于下一代储能设备的理想凝胶电解质提供了一种简便而通用的方法。

更新日期：2019-06-11

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