Carbon hollow fibers with tunable hierarchical structure as self-standing supercapacitor electrode

Liu，Chuanyong1; Wang，Liang1; Xia，Zhaopeng1; Chen，Rouxi2; Wang，Hsing Lin2; Liu，Yong1

2022-03-01

10.1016/j.cej.2021.134099

CHEMICAL ENGINEERING JOURNAL   影响因子和分区

1385-8947

1873-3212

Hollow porous carbon fibers (HPCF) have shown great promise as electrode materials for high-performance supercapacitor due to its light weight and short ion diffusion pathway. However, it remains a challenge to prepare self-standing HPCF with abundant active sites and robust secondary structure via facile processing methods. We have fabricated a HPCF with hierarchical pores by a wet-spinning integrated with chemical foaming strategy and subsequent carbonization-activation. The unique cellular structure combined with hierarchical meso-/micro-pores in HPCF allows exposure of abundant active sites. Especially, interconnected macro-pores facilitates the permeability of liquid electrolyte and mesopores promotes the rate of ions transport. The effect of blowing agents (isocyanate) content on the microstructures and electrochemical properties of HPCF were investigated. The HPCF-10 as self-standing electrode delivered a large specific capacitance as high as 283F/g at 1 A/g and long-term cycle stability (100% capacitance retention after 10,000 cycles). The MnO doped electrode had a pseudocapacitive behavior and showed an improved specific capacitance of 353F/g at 1A/g. The assembled asymmetric supercapacitor displayed an energy density of 17.8 Wh/kg and power density of 2.5 kW/kg. In addition, it displayed an excellent retention of 90.5% after 10,000 cycles. HPCF-based supercapacitors allow great promises for energy storage devices.

Cellular structure Hierarchical pores Hollow carbon fiber Self-standing electrode Supercapacitor

SCI ; EI

英语

其他

Scientific Research Project of Tianjin Municipal Education Commission[2019ZD01] ; Tianjin Natural Science Foundation[18JCQNJC71600] ; Tianjin Research Innovation Project for Postgraduate Students[2020YJSB067]

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:000779236800002

ELSEVIER SCIENCE SA

20215111354975

Capacitance ; Carbon fibers ; Carbonization ; Cellular automata ; Electrodes ; Electrolytes ; Manganese oxide ; Porous materials ; Spinning (fibers)

Electricity: Basic Concepts and Phenomena:701.1 ; Electric Batteries and Fuel Cells:702 ; Electric Components:704.1 ; Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory:721.1 ; Computer Software, Data Handling and Applications:723 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Fiber Chemistry and Processing:819.3 ; Mathematics:921 ; Materials Science:951

ENGINEERING

2-s2.0-85121269691

Scopus

1.School of Textiles Science and Engineering,Tiangong University,Tianjin,Binshui West Road 399, Xiqing Distinct,300387,China
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Liu，Chuanyong,Wang，Liang,Xia，Zhaopeng,et al. Carbon hollow fibers with tunable hierarchical structure as self-standing supercapacitor electrode[J]. CHEMICAL ENGINEERING JOURNAL,2022,431.

Liu，Chuanyong,Wang，Liang,Xia，Zhaopeng,Chen，Rouxi,Wang，Hsing Lin,&Liu，Yong.(2022).Carbon hollow fibers with tunable hierarchical structure as self-standing supercapacitor electrode.CHEMICAL ENGINEERING JOURNAL,431.

Liu，Chuanyong,et al."Carbon hollow fibers with tunable hierarchical structure as self-standing supercapacitor electrode".CHEMICAL ENGINEERING JOURNAL 431(2022).