1. Nickel-cobalt-TiO2 co-doped lignin based carbon nanofibers: Versatile integrated material for supercapacitor and microwave absorption.
- Author
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Dai, Zhong, Zhang, Yazeng, Ma, Yin, Wu, Ying, Miao, Chuyu, and Li, Yuchun
- Subjects
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SUPERCAPACITORS , *MICROWAVE materials , *LIGNINS , *CARBON nanofibers , *DOPING agents (Chemistry) , *TITANIUM dioxide , *NANOWIRES , *ENERGY density - Abstract
The development of multifunctional composites is a challenging but necessary path for the miniaturization and integration of electronic products. Herein, versatile bimetal hydroxide (NiCo 2 (OH) 6) nanowires coated on TiO 2 modified lignin based carbon nanofibers (CNFs/TiO 2 @NiCo 2 (OH) 6) have been prepared successfully by the method of electrospinning followed by hydrothermal treatment. The loading of NiCo 2 (OH) 6 , the doping of N, and the modification of TiO 2 endow the CNFs/TiO 2 @NiCo 2 (OH) 6 with multifunctional application in energy storage and microwave absorption (MA). The abundant pores and active sites result in an excellent electrochemical performance with a high specific capacitance of 752.47 F g−1 at 1 A g−1. More importantly, the assembled supercapacitor exhibits a maximum energy density of 60.64 Wh kg−1 and a superior stability of 90.2 % even after 4000 cycles at the current density of 10 A g−1. Moreover, considering the unique porous layered-structure as well as eminent electromagnetic matching properties, as-prepared composites display an excellent MA property, which possesses a minimum reflection loss (RL min) of −46.48 dB and a maximum effective absorption bandwidth (EAB, RL < 10 dB) of 2 GHz (covering 47.62 % of X-band frequency). This work simultaneously delivers the potential application in the field of energy storage and MA. [Display omitted] • Bimetal hydroxide nanowires are grown on TiO 2 modified lignin based CNFs. • TiO 2 doping can enhance the MA properties of composites by improving the permittivity. • The doped TiO 2 generates more micro-defects and oxygen vacancies in CNFs. • The proposed design endows the versatile composites with excellent performance. • Providing a promising approach for the high-value utilization of lignin [ABSTRACT FROM AUTHOR]
- Published
- 2023
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