Guo Ying, Zheng Kaiqiang, Wan Pengbo
Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
Center of Advanced Elastomer Materials, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
Small. 2018 Apr;14(14):e1704497. doi: 10.1002/smll.201704497. Epub 2018 Feb 27.
The development of integrated high-performance supercapacitors with all-in-one configuration, excellent flexibility and autonomously intrinsic self-healability, and without the extra healable film layers, is still tremendously challenging. Compared to the sandwich-like laminated structures of supercapacitors with augmented interfacial contact resistance, the flexible healable integrated supercapacitor with all-in-one structure could theoretically improve their interfacial contact resistance and energy densities, simplify the tedious device assembly process, prolong the lifetime, and avoid the displacement and delamination of multilayered configurations under deformations. Herein, a flexible healable all-in-one configured supercapacitor with excellent flexibility and reliable self-healing ability by avoiding the extra healable film substrates and the postassembled sandwich-like laminated structures is developed. The healable all-in-one configured supercapacitor is prepared from in situ polymerization and deposition of nanocomposites electrode materials onto the two-sided faces of the self-healing hydrogel electrolyte separator. The self-healing hydrogel film is obtained from the physically crosslinked hydrogel with enormous hydrogen bonds, which can endow the healable capability through dynamic hydrogen bonding. The assembled all-in-one configured supercapacitor exhibits enhanced capacitive performance, good cycling stability, reliable self-healing capability, and excellent flexibility. It holds broad prospects for obtaining various flexible healable all-in-one configured supercapacitors for working as portable energy storage devices in wearable electronics.
开发具有一体化配置、出色柔韧性和自主内在自修复能力且无需额外可自愈薄膜层的集成高性能超级电容器，仍然极具挑战性。与具有增大界面接触电阻的超级电容器的三明治状层压结构相比，具有一体化结构的柔性可自愈集成超级电容器理论上可以改善其界面接触电阻和能量密度，简化繁琐的器件组装过程，延长使用寿命，并避免多层结构在变形下的位移和分层。在此，通过避免额外的可自愈薄膜基材和后组装的三明治状层压结构，开发了一种具有出色柔韧性和可靠自修复能力的柔性可自愈一体化配置超级电容器。这种可自愈一体化配置超级电容器是通过将纳米复合电极材料原位聚合和沉积在自修复水凝胶电解质隔膜的两个面上制备而成。自修复水凝胶薄膜由具有大量氢键的物理交联水凝胶获得，其可通过动态氢键赋予自修复能力。组装好的一体化配置超级电容器表现出增强的电容性能、良好的循环稳定性、可靠的自修复能力和出色的柔韧性。它在获得各种用于可穿戴电子设备中作为便携式储能器件的柔性可自愈一体化配置超级电容器方面具有广阔前景。
