Continuous Fabrication of Ti3C2Tx MXene-Based Braided Coaxial Zinc-Ion Hybrid Supercapacitors with Improved Performance

Nano-Micro Letters

Tien-Chien Jen¹  Aibing Chen²  Bao Shi²  Xinying Liu³  La Li⁴  Guozhen Shen⁴ 

[1] Department of Mechanical Engineering Science, Kingsway Campus, University of Johannesburg, Auckland Park, 2006, Johannesburg, South Africa;Hebei University of Science and Technology, 70 Yuhua Road, 050018, Shijiazhuang, People’s Republic of China;Institute for Development of Energy for African Sustainability, University of South Africa, Private Bag X6, 1710, Florida, South Africa;State Key Laboratory for Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences & Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, 100083, Beijing, People’s Republic of China;

关键词: TiCT;    MXene;    Fiber supercapacitor;    Coaxial structure;    Zinc-ion;   

DOI  :  10.1007/s40820-021-00757-6

来源: Springer

【 摘 要 】

tsTi3C2Tx MXene-based coaxial zinc-ion hybrid fiber supercapacitors (FSCs) were fabricated with braided structure, which can be prepared continuously and present excellent flexibility and ultrastability.A sports watch driven by the watch belts which weaved uses the obtained zinc-ion hybrid FSC and LED arrays lighted by the FSCs under embedding into textiles, demonstrating the great potential application in smart wearable textiles.AbstractZinc-ion hybrid fiber supercapacitors (FSCs) are promising energy storages for wearable electronics owing to their high energy density, good flexibility, and weavability. However, it is still a critical challenge to optimize the structure of the designed FSC to improve energy density and realize the continuous fabrication of super-long FSCs. Herein, we propose a braided coaxial zinc-ion hybrid FSC with several meters of Ti3C2Tx MXene cathode as core electrodes, and shell zinc fiber anode was braided on the surface of the Ti3C2Tx MXene fibers across the solid electrolytes. According to the simulated results using ANSYS Maxwell software, the braided structures revealed a higher capacitance compared to the spring-like structures. The resulting FSCs exhibited a high areal capacitance of 214 mF cm–2, the energy density of 42.8 μWh cm−2 at 5 mV s−1, and excellent cycling stability with 83.58% capacity retention after 5000 cycles. The coaxial FSC was tied several kinds of knots, proving a shape-controllable fiber energy storage. Furthermore, the knitted FSC showed superior stability and weavability, which can be woven into watch belts or embedded into textiles to power smart watches and LED arrays for a few days.

【 授权许可】

CC BY