Zinc-ion hybrid fiber supercapacitors(FSCs) are promising energy storages for wearable elec-tronics 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 simu-lated 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.Further-more,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.

Bao Shi;La Li;Aibing Chen;Tien-Chien Jen;Xinying Liu;Guozhen Shen

Hebei University of Science and Technology,70 Yuhua Road,Shijiazhuang 050018,People's Republic of China;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,Beijing 100083,People's Republic of China;Department of Mechanical Engineering Science,Kingsway Campus,University of Johannesburg,Auckland Park,Johannesburg 2006,South Africa;Institute for Development of Energy for African Sustainability,University of South Africa,Private Bag X6,Florida 1710,South Africa

纳微快报（英文）

[1]Bao Shi;La Li;Aibing Chen;Tien-Chien Jen;Xinying Liu;Guozhen Shen-.Continuous Fabrication of Ti3C2Tx MXene-Based Braided Coaxial Zinc-Ion Hybrid Supercapacitors with Improved Performance)[J].纳微快报（英文）,2022(02):206-215

Braided,FSCs,weavability,watches

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