A safeguarding and high temperature tolerant organogel electrolyte for flexible solid-state supercapacitors
A safeguarding and high temperature tolerant organogel electrolyte for flexible solid-state supercapacitors
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用于柔性固态超级电容器的安全且耐高温的有机凝胶电解质
DOI：
10.1016/j.jpowsour.2021.230083
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发表时间：
2021
影响因子：
9.2
通讯作者：
Xinglong Gong
中科院分区：
文献类型：
--
作者：
Yuxuan Wu;Sheng Wang;Min Sang;Quan Shu;Junshuo Zhang;Shouhu Xuan;Xinglong Gong
将聚乙烯醇(PVA)溶解在乙二醇(EG)中，与剪切增稠液(STF)混合，制备了具有抗冲击和耐高温性能的有机凝胶电解质，制备了STF增强超级电容器(SSC)。由于EG和PVA之间的氢键和EG的热力学稳定性，SSC具有良好的环境稳定性，可以承受80℃的高温，高电位窗口为1.7 V。由于有机凝胶在80℃时具有更好的离子导电性，SSC的电容也增加了90%。更重要的是，所设计的SSC可以耗散并将锤击冲击力从570 N降低到81 N，表现出出色的抗冲击性能。这种超强的防护性能是STF、二氧化硅填料和基质中氢键的剪切增稠(ST)效应协同作用的结果。最后，基于三个SSCS的系列可穿戴腕带在恶劣冲击下保持95%的容量，可以保护人类。因此，这项工作为功能性SSC作为可穿戴电子设备和安全领域的新电源的发展开辟了一条新的途径。
An organogel electrolyte with anti-impact and high-temperature tolerance properties is developed by dissolving poly(vinyl alcohol) (PVA) in ethylene glycol (EG) and mixing with shear thickening fluid (STF) to fabricate STF reinforced supercapacitor (SSC). Because of the hydrogen bond between EG and PVA and the thermodynamic stability of EG, SSC possesses good environmental stability and can withstand a high temperature of 80 °C with a high potential window of 1.7 V. The capacitance of SSC also increases by 90% due to the better ionic conductivity of the organogel at 80 °C. More importantly, the as-designed SSC can dissipate and reduce hammer impact force from 570 N to 81 N, showing an outstanding anti-impact property. This super safeguarding property results from the synergistic effect of shear thickening (ST) effect of STF, SiO2fillers, and hydrogen bonds in the matrix. Finally, a three SSCs-based series wearable wristband maintains 95% of capacitance from harsh impact and can protect human beings. Thus, this work opens a new avenue for the development of functional SSC as new power source in wearable electronics and safeguard areas.