Integrating Flexible Ultralight 3D Ni Micromesh Current Collector with NiCo Bimetallic Hydroxide for Smart Hybrid Supercapacitors
Integrating Flexible Ultralight 3D Ni Micromesh Current Collector with NiCo Bimetallic Hydroxide for Smart Hybrid Supercapacitors
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DOI：
10.1002/adfm.202100290
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发表时间：
2021-04
影响因子：
19
通讯作者：
Guanhua Zhang;Jin Hu;Yan Nie;Yanli Zhao;Lei Wang;Yizhou Li;Huaizhi Liu;Lizhen Tang;Xianan Zhan
中科院分区：
文献类型：
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作者：
Guanhua Zhang;Jin Hu;Yan Nie;Yanli Zhao;Lei Wang;Yizhou Li;Huaizhi Liu;Lizhen Tang;Xianan Zhan
柔性、轻量化的超级电容器具有上级机械柔性和出色的容量，被视为可穿戴电子设备的理想电源。同时，结合额外的新特性，如透明性和电致变色性，可以进一步有利于智能超级电容器的发展。然而，常用的平面结构集流体的应用受到其固有性质的严重限制，例如刚性差、厚度大和负载表面积有限。具有3D架构、高导电性和易于集成的柔性和超轻集电器被认为是构建高性能超级电容器的最合适的替代品。在这项研究中，开发了一种新型的可扩展的制造技术，以生产用于超级电容器的柔性和超轻的3D Ni微网（3D NM）集流体。由3D NM和高活性镍钴氢氧化物（3D NM@NiCo BH）集成的灵活智能超级电容器提供了可观的速率性能（从1到50 mA cm−2的60.6%容量保持率）。此外，所制造的与电致变色功能集成的混合超级电容器装置可以通过彩色显示器在视觉上指示能量水平。这种基于超轻3D Ni微网的柔性电致变色超级电容器为智能可穿戴电子设备的多功能储能系统提供了新的见解。
Flexible and lightweight supercapacitors with superior mechanical flexibility and outstanding capacity are regarded as an ideal power source for wearable electronic devices. Meanwhile, incorporating additional novel characters such as transparency and electrochromism can further benefit the development of smart supercapacitors. Nevertheless, the application of the commonly used planar‐structural current collectors is seriously restricted by their intrinsic properties such as poor rigidity, large thickness, and limited loading surface area. Flexible and ultralight current collectors with 3D architecture, high conductivity, and easy integration are believed to be the most appropriate alternatives to build high‐performance supercapacitors. In this study, a novel and scalable manufacturing technique is developed to produce a flexible and ultralight 3D Ni micromesh (3D NM) current collector for supercapacitor. Flexible smart supercapacitor integrated by 3D NM and high active Ni–Co bimetallic hydroxide (3D NM@NiCo BH) delivers a considerable rate performance (60.6% capacity retention from 1 to 50 mA cm−2). Furthermore, the fabricated hybrid supercapacitor device integrated with electrochromic functionality can visually indicate the energy level by a color display. This flexible electrochromic supercapacitor based on ultralight 3D Ni micromesh provides a novel insight into multifunctional energy storage systems for smart wearable electronic devices.