High-capacitance supercapacitors using nitrogen-decorated porous carbon derived from novolac resin containing peptide linkage

Kim, Yong Jung; Jang, In Young; Park, Ki Chul; Jung, Yong Chae; Oka, Takuyuki; Iinou, Satoshi; Komori, Yasuhiro; Kozutsumi, Toshihiko; Hashiba, Takashi; Kim, Yoong Ahm; Endo, Morinobu

doi:10.1016/j.electacta.2010.04.094

Cited by 19 publications

(11 citation statements)

References 24 publications

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“…Generally, a higher knee frequency corresponds to a better rate performance, which agrees with the CV results. In the medium‐frequency region, the inclined line with a slope of about 45° above the knee frequency is called the Warburg resistance, and is representative of the diffusion of electrolyte ions within porous electrodes 31–33. The projected length of the Warburg curve on the real impedance axis ( Z re ) characterizes the ion penetration process 33–35.…”

Section: Resultsmentioning

confidence: 99%

“…In the medium-frequency region, the inclined line with a slope of about 45 ° above the knee frequency is called the Warburg resistance, and is representative of the diffusion of electrolyte ions within porous electrodes. [31][32][33] The projected length of the Warburg curve on the real impedance axis ( Z re ) characterizes the ion penetration process. [33][34][35] The Warburg length of the GCP membrane is shorter than that of the G-paper, which indicates that the GCP material has a short ion-diffusion path, due to the role of the cellulose fi bers as electrolyte reservoirs.…”

Section: Mechanical Flexibility Of Gcp Membranesmentioning

confidence: 99%

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Graphene–Cellulose Paper Flexible Supercapacitors

Weng

Wang

et al. 2011

Advanced Energy Materials

877

559

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A simple and scalable method to fabricate graphene‐cellulose paper (GCP) membranes is reported; these membranes exhibit great advantages as freestanding and binder‐free electrodes for flexible supercapacitors. The GCP electrode consists of a unique three‐dimensional interwoven structure of graphene nanosheets and cellulose fibers and has excellent mechanical flexibility, good specific capacitance and power performance, and excellent cyclic stability. The electrical conductivity of the GCP membrane shows high stability with a decrease of only 6% after being bent 1000 times. This flexible GCP electrode has a high capacitance per geometric area of 81 mF cm−2, which is equivalent to a gravimetric capacitance of 120 F g−1 of graphene, and retains >99% capacitance over 5000 cycles. Several types of flexible GCP‐based polymer supercapacitors with various architectures are assembled to meet the power‐energy requirements of typical flexible or printable electronics. Under highly flexible conditions, the supercapacitors show a high capacitance per geometric area of 46 mF cm−2 for the complete devices. All the results demonstrate that polymer supercapacitors made using GCP membranes are versatile and may be used for flexible and portable micropower devices.

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Section: Resultsmentioning

confidence: 99%

Section: Mechanical Flexibility Of Gcp Membranesmentioning

confidence: 99%

Graphene–Cellulose Paper Flexible Supercapacitors

Weng

Wang

et al. 2011

Advanced Energy Materials

877

559

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“…At the medium frequency region, the straight line with an angle of about 45 represents the relatively lower Warburg resistance of the electrolyte ions diffusion. 24,25 It may be because the 3D honeycomb porous structure of the WTSS/PPy electrode promotes the transmission efficiency of electrolyte ions.…”

Section: Resultsmentioning

confidence: 99%

Novel wood-based all-solid-state flexible supercapacitors fabricated with a natural porous wood slice and polypyrrole

Wang

et al. 2015

RSC Adv.

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“…12 By employing carbon sources rich in nitrogen, a series of nitrogen-enriching ACs were prepared by KOH activation of polyaniline, 73,74 silk fibroin, 75 ammoxidised coal, 76 and novolac resin. 77 The nitrogen-containing ACs derived from polyaniline possessed high SSA up to 2287 m 2 g À1 . The nitrogen atoms existed in the form pyridinic, pyrrolic, quaternary, and oxidized nitrogen groups.…”

Section: Koh-activated Carbons With Heteroatoms Within Their Structuresmentioning

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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High-capacitance supercapacitors using nitrogen-decorated porous carbon derived from novolac resin containing peptide linkage

Cited by 19 publications

References 24 publications

Graphene–Cellulose Paper Flexible Supercapacitors

Graphene–Cellulose Paper Flexible Supercapacitors

Novel wood-based all-solid-state flexible supercapacitors fabricated with a natural porous wood slice and polypyrrole

KOH activation of carbon-based materials for energy storage

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