Effect of activation on the carbon fibers from phenol–formaldehyde resins for electrochemical supercapacitors

Xue, Rong; Yan, Jingwang; Liu, Xiaoxue; Tian, Ying; Yi, Baolian

doi:10.1007/s10800-011-0357-1

Cited by 24 publications

(14 citation statements)

References 22 publications

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“… Electron microscopy images of high surface area carbon materials: a) SEM of active carbon fibers 180. b) SEM of templated carbide‐derived carbon 181.…”

Section: Electric Double‐layer Capacitorsmentioning

confidence: 99%

Challenges Facing Lithium Batteries and Electrical Double‐Layer Capacitors

et al. 2012

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Energy-storage technologies, including electrical double-layer capacitors and rechargeable batteries, have attracted significant attention for applications in portable electronic devices, electric vehicles, bulk electricity storage at power stations, and "load leveling" of renewable sources, such as solar energy and wind power. Transforming lithium batteries and electric double-layer capacitors requires a step change in the science underpinning these devices, including the discovery of new materials, new electrochemistry, and an increased understanding of the processes on which the devices depend. The Review will consider some of the current scientific issues underpinning lithium batteries and electric double-layer capacitors.

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“… Electron microscopy images of high surface area carbon materials: a) SEM of active carbon fibers 180. b) SEM of templated carbide‐derived carbon 181.…”

Section: Electric Double‐layer Capacitorsmentioning

confidence: 99%

Challenges Facing Lithium Batteries and Electrical Double‐Layer Capacitors

et al. 2012

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“…Compared to specific capacitances (136 and 63 F g À1 ) of CFs treated by CO 2 , CFs treated by KOH exhibited higher capacitances (214 and 116 F g À1 ) in aqueous and organic electrolytes, respectively, and good rate capability due to the higher SSA and well-adapted PSD of CFs activated by KOH. 58 CDCs represent a new kind of porous carbons produced by selective thermo-chemical etching of the carbide-forming element from metal carbide. Nanoporous CDCs have promising potential in H 2 storage, catalysis, separation/purification, etc.…”

Section: Various Structured Carbons As Carbon Sourcesmentioning

confidence: 99%

KOH activation of carbon-based materials for energy storage

2012

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Because of their availability, adjustable microstructure, varieties of forms, and large specific surface area, porous carbon materials are of increasing interest for use in hydrogen storage adsorbents and electrode materials in supercapacitors and lithium-sulfur cells from the viewpoint of social sustainability and environmental friendliness. Therefore, much effort has been made to synthesize and tailor the microstructures of porous carbon materials via various activation procedures (physical and chemical activation). In particular, the chemical activation of various carbon sources using KOH as the activating reagent is very promising because of its lower activation temperature and higher yields, and well-defined micropore size distribution and ultrahigh specific surface area up to 3000 m 2 g À1 of the resulting porous carbons. In this feature article, we will cover recent research progress since 2007 on the synthesis of KOH-activated carbons for hydrogen and electrical energy storage (supercapacitors and lithium-sulfur batteries). The textural properties and surface chemistry of KOH-activated carbons depend on not only the synthesis parameters, but also different carbon sources employed including fossil/biomass-derived materials, synthetic organic polymers, and various nanostructured carbons (e.g. carbon nanotubes, carbon nanofibers, carbon aerogels, carbide-derived carbons, graphene, etc.). Following the introduction to KOH activation mechanisms and processing technologies, the characteristics and performance of KOH-activated carbons as well as their relationships are summarized and discussed through the extensive analysis of the literature based on different energy storage systems. Jiacheng WangJiacheng Wang received his PhD in materials physics and chemistry from Shanghai Institute of Ceramics, Chinese Academy of Sciences in 2007 under the supervision of Prof. Qian Liu. After three and a half years of postdoctoral research as a project researcher and then a JSPS postdoctoral fellow at the University of Tokyo, he joined the research group of

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“…Among the different materials studied as electrodes for supercapacitors, activated carbons (ACs) are the most widely used due to their high surface area and relatively low resistivity [2,3]. Because the main energy storage mechanism in EDLCs arises from the electrostatic accumulation of electrolyte ions on the electrode surface, the capacitance of EDLCs typically increases with the specific surface area of the ACs [4,5]. Highly porous materials with specific surface areas exceeding 3000 m 2 g -1 have been obtained by KOH activation of carbons [6][7][8][9], but commercially available ACs typically exhibit a more modest porosity of approximately 1000-1500 m 2 g -1 .…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-containing chitosan-based carbon as an electrode material for high-performance supercapacitors

et al. 2016

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Nitrogen-containing activated carbons were prepared from chitosan, a widely available and inexpensive biopolysaccharide, by a simple procedure and tested as electrode material in supercapacitors. The physical activation of chitosan chars with CO 2 led to carbons with a very high nitrogen content (up to 5.4 wt%) and moderate surface areas (1000-1100 m 2 g -1 ). Only chitosan-based activated carbons with a similar microporous structure were considered in this study to evaluate the effect of the nitrogen content and distribution on their electrochemical performance. The N-containing activated carbons were tested in two-and three-electrode supercapacitors using an aqueous electrolyte (1 M H 2 SO 4 ), and they exhibited superior surface capacitance (19.5 lF cm -2 ) and pseudocapacitance compared to a commercial activated carbon with a negligible nitrogen content and similar microporosity. The low oxygen content and the presence of stable quaternary nitrogen improved the charge propagation on the chitosan-based carbons, which was confirmed by the high capacity retention of 83 %. The chitosan-based carbons exhibited excellent cyclic stability and maintained 100 % of their capacitance after 5000 charge/discharge cycles at a current density of 1 A g -1 . These results demonstrate the suitability of chitosan-based carbons for application in energy storage systems.Electronic supplementary material The online version of this article

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Effect of activation on the carbon fibers from phenol–formaldehyde resins for electrochemical supercapacitors

Cited by 24 publications

References 22 publications

Challenges Facing Lithium Batteries and Electrical Double‐Layer Capacitors

Challenges Facing Lithium Batteries and Electrical Double‐Layer Capacitors

KOH activation of carbon-based materials for energy storage

Nitrogen-containing chitosan-based carbon as an electrode material for high-performance supercapacitors

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