High‐Energy Asymmetric Supercapacitor Yarns for Self‐Charging Power Textiles

作者：Mengmeng Liu, Zifeng Cong, Xiong Pu, Wenbin Guo, Ting Liu, Meng Li, Yang Zhang, Weiguo Hu, Zhong Lin Wang · 发表于：Advanced Functional Materials · 年份：2019 · DOI：10.1002/adfm.201806298 · 被引用次数：163 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Supercapacitor Materials and Fabrication、Conducting polymers and applications

Abstract Rapid growth of electronic textile increases the demand for textile‐based power sources, which should have comparable lightweight, flexibility, and comfort. In this work, a self‐charging power textile interwoven by all‐yarn‐based energy‐harvesting triboelectric nanogenerators (TENG) and energy‐storing yarn‐type asymmetric supercapacitors (Y‐ASC) is reported. Common polyester yarns with conformal Ni/Cu coating are utilized as 1D current collectors in Y‐ASCs and electrodes in TENGs. The solid‐state Y‐ASC achieves high areal energy density (≈78.1 µWh cm −2 ), high power density (14 mW cm −2 ), stable cycling performance (82.7% for 5000 cycles), and excellent flexibility (1000 cycles bending for 180°). The TENG yarn can be woven into common fabrics with desired stylish designs to harvest energy from human daily motions at high output (≈60 V open‐circuit voltage and ≈3 µA short‐circuit current). The integrated self‐charging power textile is demonstrated to power an electronic watch without extra recharging by other power sources, suggesting its promising applications in electronic textiles and wearable electronics.