Direct coherent multi-ink printing of fabric supercapacitors
Jingxin Zhao, Hongyu Lu, Yan Zhang, S.Y. Yu, Oleksandr I. Malyi, Xiaoxin Zhao, Litong Wang, Huibo Wang, Jianhong Peng, Xifei Li, Yanyan Zhang, Shi Chen, Hui Pan, Guichuan Xing, Conghua Lu, Yuxin Tang, Xiaodong Chen
Abstract
Coaxial fiber-shaped supercapacitors with short charge carrier diffusion paths are highly desirable as high-performance energy storage devices for wearable electronics. However, the traditional approaches based on the multistep fabrication processes for constructing the fiber-shaped energy device still encounter persistent restrictions in fabrication procedure, scalability, and mechanical durability. To overcome this critical challenge, an all-in-one coaxial fiber-shaped asymmetric supercapacitor (FASC) device is realized by a direct coherent multi-ink writing three-dimensional printing technology via designing the internal structure of the coaxial needles and regulating the rheological property and the feed rates of the multi-ink. Benefitting from the compact coaxial structure, the FASC device delivers a superior areal energy/power density at a high mass loading, and outstanding mechanical stability. As a conceptual exhibition for system integration, the FASC device is integrated with mechanical units and pressure sensor to realize high-performance self-powered mechanical devices and monitoring systems, respectively.