Sponge-Like Microfiber Electrodes for High-Performance Redox Flow Batteries

Sun, Jing1; Wan, Yuhan1; Jian, Qinping1; Fan, Xinzhuang1; Zhao, Tianshou1,2

2022-08-01

10.1002/smtd.202200626

Small Methods   影响因子和分区

2366-9608

Fabricating fiber-based electrodes with a large specific surface area while maintaining high flow permeability is a challenging issue in developing high-performance redox flow batteries. Here, a sponge-like microfiber carbon electrode is reported with a specific surface area of as large as 853.6 m(2) g(-1) while maintaining a fiber diameter in the range of 5-7 mu m and a macropore size of approximate to 26.8 mu m. The electrode is developed by electrospinning cross-linked poly(vinyl alcohol)-lignin-polytetrafluoroethylene precursors, followed by oxidation and pyrolysis. Applying the as-synthesized electrodes to a vanadium redox flow battery enables the battery to achieve an energy efficiency of 79.1% at the current density of 400 mA cm(-2) and a capacity retention rate of 99.94% over 2000 cycles, representing one of the best battery performances in the open literature. The strategy to fabricate sponge-like porous carbon microfibers holds great promise for versatile applications in redox flow batteries and other energy storage systems.

cross-linking electrospinning fiber diameter porous carbon fibers redox flow batteries specific surface area

SCI ; EI

英语

通讯

Research Grant Council of the Hong Kong Special Administrative Region, China[T23-601/17-R] ; Shenzhen-Hong Kong-Macao Science and Technology Program (Category C)[SGDX2020110309460000] ; Natural Science Foundation of Guangdong Province[2021A1515011821]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000845083100001

WILEY-V C H VERLAG GMBH

20223512641697

Electrodes ; Electrospinning ; Energy efficiency ; Flow batteries ; Microfibers ; Polyvinyl alcohols ; Porous materials

Energy Conservation:525.2 ; Secondary Batteries:702.1.2 ; Light, Optics and Optical Devices:741 ; Fiber Optics:741.1.2 ; Organic Polymers:815.1.1 ; Fiber Chemistry and Processing:819.3 ; Materials Science:951

Web of Science

1.Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Kowloon, Clear Water Bay, Hong Kong 999077, Peoples R China
2.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China

Sun, Jing,Wan, Yuhan,Jian, Qinping,et al. Sponge-Like Microfiber Electrodes for High-Performance Redox Flow Batteries[J]. Small Methods,2022.

Sun, Jing,Wan, Yuhan,Jian, Qinping,Fan, Xinzhuang,&Zhao, Tianshou.(2022).Sponge-Like Microfiber Electrodes for High-Performance Redox Flow Batteries.Small Methods.

Sun, Jing,et al."Sponge-Like Microfiber Electrodes for High-Performance Redox Flow Batteries".Small Methods (2022).