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20. A Low‐Permeability and Flexible Polymer Tube for Long‐Life Fiber Lithium‐Ion Batteries.

Author

Jiang, Haibo, Gong, Xiaocheng, Wang, Jiaqi, Yang, Zhe, Li, Chuanfa, Long, Yao, Lu, Chenhao, Sun, Shiqi, Zhang, Kun, Chang, Yingfan, Li, Pengzhou, Cheng, Xiangran, Peng, Huisheng, and Wang, Bingjie

Abstract

Fiber lithium‐ion batteries (FLIBs) hold great promise for powering wearable electronics. However, their practical application is hindered by limited cycle and calendar life, primarily due to the loss of active Li caused by water vapor permeation through the encapsulation layer. To address this challenge, a low‐permeability and high‐flexibility tetrafluoroethylene hexafluoropropylene copolymer (FEP) tube is presented to continuously encapsulate FLIBs by melting extrusion method. Owing to the inherent hydrophobicity of fluorine resins and appropriate crystallinity of the polymer matrix, FEP tubes exhibited significantly low vapor permeability, with a water vapor transmittance rate (WVTR) of 0.3 mg·day−1·pkg−1, 15 times lower than that of the nylon 12 tubes (4.6 mg·day−1·pkg−1). Leveraging the low permeability and elastic modulus of FEP tubes, FLIBs demonstrate a capacity retention of 80.05% after 180 cycles and exceptional flexibility with a capacity retention of 98.32% after 10 000 bending cycles, showcasing superior performance compared to the conventional polymer tubes (for example, the capacity of PP‐FLIBs declined by 20.68% after 30 cycles). This work presents a general and efficient strategy for continuously encapsulating FLIBs, effectively extending their cycle and calendar lifetime of FLIBs, thereby enhancing their practical viability for wearable electronic applications. [ABSTRACT FROM AUTHOR]

Published
2024
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21. All‐in‐One Polymer Gel Electrolyte towards High‐Efficiency and Stable Fiber Zinc‐Air Battery.

Author

Yang, Zhe, Li, Pengzhou, Li, Jiaxin, Li, Chuanfa, Zhang, Yanan, Kong, Taoyi, Liao, Meng, Song, Tianbing, Li, Jinyan, Liu, Peiyu, Cao, Siwei, Wang, Yonggang, Chen, Peining, Peng, Huisheng, and Wang, Bingjie

Subjects
*OXYGEN evolution reactions, *CHEMICAL kinetics, *ACTIVATION energy, *POLYELECTROLYTES, *POLYMER colloids
Abstract

Fiber zinc‐air batteries are explored as promising power systems for wearable and portable electronic devices due to their intrinsic safety and the use of ambient oxygen as cathode material. However, challenges such as limited zinc anode reversibility and sluggish cathode reaction kinetics result in poor cycling stability and low energy efficiency. To address these challenges, we design a polydopamine‐based all‐in‐one gel electrolyte (PAGE) that simultaneously regulates the reversibility of zinc anodes and the kinetics of air cathodes through polydopamine interfacial and redox chemistry, respectively. The intrinsic catechol and carboxylate groups in PAGE regulate the transport and solvation structure of Zn2+, facilitating dendrite‐free zinc deposition with a lamellar stacking morphology. Additionally, the oxidation of redox‐active catechol groups in PAGE replaces the sluggish oxygen evolution reaction on the air cathode and reduces the energy barrier for charging, enabling fiber zinc‐air batteries to achieve a significantly improved energy efficiency of 95 % and a longer lifespan of 40 hours. Further integration into self‐powered electronic textiles underscores its potential for next‐generation wearable systems. [ABSTRACT FROM AUTHOR]

Published
2024
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47. Swimmable Micro‐Battery for Targeted Power Delivery

Author

Li, Pengzhou, primary, Yang, Zhe, additional, Li, Chuanfa, additional, Li, Jiaxin, additional, Wang, Chuang, additional, Chen, Jiawei, additional, Yu, Sijia, additional, Zhang, Yanan, additional, Jiang, Yi, additional, Gao, Yue, additional, Wang, Bingjie, additional, and Peng, Huisheng, additional

Published
2023
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