Electrospun Ni-Ni(OH)2/Carbon Nanofibers as Flexible Binder-Free Supercapacitor Electrode with Enhanced Specific Capacitance

There is a need to address the gap between the theoretical benefits and cost-efficient production of supercapacitors in the market in order to sway the preference of the industry from the current perishable energy sources and storage. More extensive exploration of sustainable fabrication methods and materials used for renewable energy storage are just some of the factors that would decrease this gap. A binder-free supercapacitor electrode made of NiCo2O4 and carbonized kapok fiber paper (CKFP) was successfully fabricated by hydrothermal process at relatively low temperatures. NiCo2O4 urchin-like structures were deposited on the surface of carbon fiber paper (CFP) and CKFP. XRD analysis confirmed the successful conversion of kapok fiber paper to CKFP after pyrolysis, as well as the growth of pure spinel NiCo2O4 nanostructures on CFP and CKFP. The cyclic voltammetry curves showed that the CFP-NiCo2O4 prepared at 140 °C had the highest specific capacitance of 143.51 Fg-1 at 2 mVs-1. The CKFP-NiCo2O4 synthesized at the same temperature yielded slightly higher specific capacitance of 146.29 Fg-1 at 2 mVs-1, and 508 Fg-1 at 0.5 Ag-1.

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Poly(azomethine ether)‐derived carbon nanofibers for self‐standing and binder‐free supercapacitor electrode material applications

Polymers for Advanced Technologies ◽

10.1002/pat.5015 ◽

2020 ◽

Vol 31 (11) ◽

pp. 2874-2883

Author(s):

Young Chul Choi ◽

Min Su Kim ◽

Kyoung Moon Ryu ◽

Sang Hoon Lee ◽

Young Gyu Jeong

Keyword(s):

Carbon Nanofibers ◽

Electrode Material ◽

Supercapacitor Electrode ◽

Binder Free

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Copolymer derived micro/meso-porous carbon nanofibers with vacancy-type defects for high-performance supercapacitors

Journal of Materials Chemistry A ◽

10.1039/c9ta08850d ◽

2020 ◽

Vol 8 (5) ◽

pp. 2463-2471 ◽

Cited By ~ 16

Author(s):

Jiye Li ◽

Weimiao Zhang ◽

Xu Zhang ◽

Liyao Huo ◽

Jiayi Liang ◽

...

Keyword(s):

Specific Capacitance ◽

Carbon Nanofibers ◽

Electrode Material ◽

Porous Carbon ◽

High Performance ◽

High Specific Capacitance ◽

Cycling Stability ◽

Supercapacitor Electrode ◽

Excellent Cycling Stability

Micro/meso-porous carbon nanofibers have been successfully prepared and directly adopted as a supercapacitor electrode material with high specific capacitance, area normalized capacitance and excellent cycling stability.

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Binary MnO2/Co3O4 Metal Oxides Wrapped on Superaligned Electrospun Carbon Nanofibers as Binder Free Supercapacitor Electrodes

Energy & Fuels ◽

10.1021/acs.energyfuels.1c00556 ◽

2021 ◽

Author(s):

Kokougan Allado ◽

Mengxin Liu ◽

Anitha Jayapalan ◽

Durga Arvapalli ◽

Kyle Nowlin ◽

...

Keyword(s):

Metal Oxides ◽

Carbon Nanofibers ◽

Binder Free

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Tuning the hierarchical pore structure of graphene oxide through dual thermal activation for high-performance supercapacitor

Scientific Reports ◽

10.1038/s41598-021-81759-7 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Jeongpil Kim ◽

Jeong-Hyun Eum ◽

Junhyeok Kang ◽

Ohchan Kwon ◽

Hansung Kim ◽

...

Keyword(s):

Graphene Oxide ◽

Pore Structure ◽

Specific Capacitance ◽

Surface Area ◽

Thermal Annealing ◽

High Performance ◽

Annealing Process ◽

Supercapacitor Electrode ◽

Simple Method ◽

Surface Areas

AbstractHerein, we introduce a simple method to prepare hierarchical graphene with a tunable pore structure by activating graphene oxide (GO) with a two-step thermal annealing process. First, GO was treated at 600 °C by rapid thermal annealing in air, followed by subsequent thermal annealing in N2. The prepared graphene powder comprised abundant slit nanopores and micropores, showing a large specific surface area of 653.2 m2/g with a microporous surface area of 367.2 m2/g under optimized conditions. The pore structure was easily tunable by controlling the oxidation degree of GO and by the second annealing process. When the graphene powder was used as the supercapacitor electrode, a specific capacitance of 372.1 F/g was achieved at 0.5 A/g in 1 M H2SO4 electrolyte, which is a significantly enhanced value compared to that obtained using activated carbon and commercial reduced GO. The performance of the supercapacitor was highly stable, showing 103.8% retention of specific capacitance after 10,000 cycles at 10 A/g. The influence of pore structure on the supercapacitor performance was systematically investigated by varying the ratio of micro- and external surface areas of graphene.

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