Yan Xinyan, Lin Xiangyu, Liu Hailang, Lu Jie, Wang Hongxiao, Huang Xujuan, Liu He, Xu Xu
School of Chemical and Chemistry, Yancheng Institute of Technology, Yancheng 224000, Jiangsu Province, China.
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, 210037 Nanjing, China; Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Nanjing 210042, Jiangsu Province, China.
Carbohydr Polym. 2024 Nov 15;344:122552. doi: 10.1016/j.carbpol.2024.122552. Epub 2024 Jul 29.
Solid-state zinc-ion hybrid supercapacitors (ZHSCs) featuring hydrogel electrolytes have become ideal for large-scale flexible energy storage. However, existing polyacrylic acid (PAA) hydrogel electrolytes often lack the combined traits of ionic conductivity, mechanical robustness, and temperature tolerance. Herein, a versatile PAA-based hydrogel electrolyte (ACBH-Zn) containing a ZnCl-cellulose solution and bentonite (BT) is delivered, facilitated by cooperative coordination bonds and hydrogen bonds. The coordination bonds between Zn and -COOH of PAA, in conjunction with cellulose and BT, alongside the abundant hydrogen bonds within cellulose and PAA, are conducive to upgrading mechanical strength and ionic conductivity, while the BT's lamellar structure further provides sufficient ion migration channels. Consequently, the ACBH-Zn showcases exceptional mechanical properties, satisfying ionic conductivity (88.9 mS cm), and excellent temperature tolerance at -60 °C (30.3 mS cm). The ACBH-ZHSC, when assembled, attains a remarkable maximum energy density (323.4 Wh kg), maintaining an impressive capacity retention rate (92 %) even after undergoing 10,000 cycles at 10.0 A g. Furthermore, the assembled self-powered triboelectric wearable electronic device effectively converts mechanical energy from human movement into electrical energy, enabling efficient storage and utilization, and offering promising insights into the application of flexible wearable devices.
具有水凝胶电解质的固态锌离子混合超级电容器（ZHSCs）已成为大规模柔性储能的理想选择。然而，现有的聚丙烯酸（PAA）水凝胶电解质往往缺乏离子导电性、机械强度和耐温性的综合特性。在此，通过配位键和氢键的协同作用，制备了一种含有ZnCl-纤维素溶液和膨润土（BT）的多功能PAA基水凝胶电解质（ACBH-Zn）。Zn与PAA的-COOH之间的配位键，与纤维素和BT一起，以及纤维素和PAA内部丰富的氢键，有利于提高机械强度和离子导电性，而BT的层状结构进一步提供了足够的离子迁移通道。因此，ACBH-Zn具有优异的机械性能，满足离子导电性（88.9 mS cm），在-60°C时具有出色的耐温性（30.3 mS cm）。组装后的ACBH-ZHSC具有显著的最大能量密度（323.4 Wh kg），即使在10.0 A g下进行10000次循环后，仍保持令人印象深刻的容量保持率（92%）。此外，组装后的自供电摩擦电可穿戴电子设备能够有效地将人体运动产生的机械能转化为电能，实现高效存储和利用，为柔性可穿戴设备的应用提供了有前景的见解。
