The flexible and wearable supercapacitors have attracted wide interest because of their widespread application in smart electronic devices with rapid charging and discharging. As an important part of supercapacitor, the electrode materials with a hollow structure, especially those with hierarchical structures that provide an array of continuous hollow cages, are considered promising. Because of its porous shell which is rich in redox reaction sites for supercapacitors. In this work, we fabricated a ZIF-67 derived hollow CoO growth on the surface of 1D NiCoO to assemble into a beaded structure. In this case, NiCo precursor acted as a structure-directing agent to grow a ZIF-67, a promising electroactive material of electrochemical capacitors to provide capacitance after calcination. Combined with the grapheneoxide (GO) based high conductivity hydrogel as the solid electrolyte, the capacitance of the flexible supercapacitor exhibited a high specific capacitance of 90F g at 0.5 A/g, and it was sturdy and durable. There was no significant loss of capacitance while suffering from bending and pressing. The outstanding electrochemical properties of the all-solid supercapacitor can be attributed to the unique nanostructure of the electrode that created more reactive active sites, increased the diffusion pathway for electrolyte ions, along with the high conductivity of the hydrogel electrolyte.

中文翻译：

---

基于GO的纳米复合水凝胶可实现基于ZIF-67衍生的分层结构电极的高性能可穿戴全固体超级电容器

柔性可穿戴超级电容器因其在快速充放电的智能电子设备中的广泛应用而引起了广泛的兴趣。作为超级电容器的重要组成部分，具有空心结构的电极材料，特别是那些具有连续空心笼阵列的分层结构的电极材料被认为是有前途的。由于其多孔外壳富含超级电容器的氧化还原反应位点。在这项工作中，我们在一维 NiCoO 表面上制造了 ZIF-67 衍生的空心 CoO 生长物，以组装成珠状结构。在这种情况下，NiCo前驱体充当结构导向剂来生长ZIF-67，ZIF-67是一种很有前途的电化学电容器电活性材料，可在煅烧后提供电容。结合氧化石墨烯（GO）基高电导率水凝胶作为固体电解质，柔性超级电容器的电容在0.5 A/g下表现出90F g的高比电容，并且坚固耐用。弯曲和挤压时电容没有明显损失。全固体超级电容器出色的电化学性能可归因于电极独特的纳米结构，它创造了更多的反应活性位点，增加了电解质离子的扩散路径，以及水凝胶电解质的高电导率。