Supercapacitors Prepared from Melamine-Based Carbon

Hulicova, Denisa; Yamashita, Juli; Soneda, Yasushi; Hatori, Hiroaki; Kodama, Masaya

doi:10.1021/cm049337g

Cited by 503 publications

(335 citation statements)

References 27 publications

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“…[14][15][16][17][18][19] Nitrogen can be incorporated into carbon network by different ways. It was proved that ammoxidation of carbon sample can bring useful effect on capacitance properties.…”

Section: Role Of Heteroatoms In Carbon Network For Capacitor Performancementioning

confidence: 99%

“…It is well known that over 850 o C the amount of nitrogen in carbon drastically diminishes. 15 The second reason could be related to the nanotextural reorganisation depending on temperature. Some pores may be closed at 900 °C and become less accessible for the electrolyte ions than for the composites prepared at 700 °C.…”

Section: Role Of Heteroatoms In Carbon Network For Capacitor Performancementioning

confidence: 99%

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Supercapacitors based on carbon materials and ionic liquids

Frąckowiak¹

2006

J. Braz. Chem. Soc.

111

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Este artigo descreve o desempenho de supercapacitores construídos a partir de diferentes materiais de carbono. São descritos também o princípio geral de supercapacitor e a fórmula associada com sua operação. A função da nanotextura de carbono é enfatizada, selecionando carbonos preparados por técnicas de moldagem. Foi demonstrado que, principalmente, microporos e pequenos mesoporos são importantes para carregar a dupla camada elétrica, entretanto, a interligação de poros é crucial para a propagação de cargas. A presença de heteroátomo na rede de carbono, por exemplo nitrogênio, é útil por causa das reações faradaicas reversíveis adicionais. Foi encontrada uma dependência linear entre os valores de capacitância e a quantidade de nitrogênio. Líquidos iônicos são atualmente considerados como uma nova geração de eletrólitos com propriedades interessantes, por exemplo, alta voltagem de operação. Um aumento na voltagem de supercapacitores (acima de 3V) foi obtido pela aplicação de líquidos iônicos baseados em sais de fosfônio. This paper presents performance of supercapacitor built from different carbon materials. The general principle of supercapacitor and formula connected with its operation are also described. The role of carbon nanotexture has been underlined selecting carbons prepared by template techniques. It has been demonstrated that mainly micropores and small mesopores play important role for charging of electrical double layer, however, interconnectivity of pores is crucial for charge propagation. The presence of heteroatom, e.g. nitrogen in the carbon network is profitable because of additional reversible faradaic reactions. A linear dependence of capacitance values vs nitrogen content has been found. Ionic liquids are presently considered as a novel generation of electrolyte with interesting properties, e.g. a high operating voltage. An increase of supercapacitor voltage (over 3V) has been realized by application of ionic liquids based on phosphonium salt.

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Section: Role Of Heteroatoms In Carbon Network For Capacitor Performancementioning

confidence: 99%

Section: Role Of Heteroatoms In Carbon Network For Capacitor Performancementioning

confidence: 99%

Supercapacitors based on carbon materials and ionic liquids

Frąckowiak¹

2006

J. Braz. Chem. Soc.

111

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“…NC shows two distinct peaks at 400.9 eV and 398.9 eV. For HTMA-C, the peak at 399.8 eV corresponds to amine or cyano groups [38,50], while the smaller peak at 401.4 eV corresponds to quaternary nitrogen (N-Q) [22,25]. The significantly larger intensity of the peak at 399.8 eV suggests that most of the nitrogen found in this sample is in the form of surface funtionalities.…”

Section: Science China Materialsmentioning

confidence: 90%

“…No nitrogen is detected in UC even though nitrogen-containing hexamine was used as the reactive catalyst during synthesis. When heated above 850°C, nitrogen is removed from carbon [22,42], so it is likely that most of the nitrogen is removed during pyrolysis at 900°C. As demonstrated with both HTMA-C and NC, modifying porous carbon with hexamine after pyrolysis and activation adds a fair amount of nitrogen.…”

Section: Science China Materialsmentioning

confidence: 99%

“…UC shows large peaks for carbon and oxygen, as well as small peaks for nitrogen and fluorine. Nitrogen is present due to the use of hexamine as the reactive catalyst during cyrogel synthesis, although much of the nitrogen is lost during pyrolysis at high temperature [22,42]. The fluorine peak is from the polytetrafluoroethylene (PTFE) binder used to prepare samples for measurement and will not be analyzed further as it has minimal effect on the performance of the material.…”

Section: Science China Materialsmentioning

confidence: 99%

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Comparison of surface and bulk nitrogen modification in highly porous carbon for enhanced supercapacitors

Uchaker

2015

Sci. China Mater.

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Supercapacitors: Electrode Materials Aspects

Zhang¹,

Lei²,

Zhang³

et al. 2005

Encyclopedia of Inorganic Chemistry

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Global warming and the finite nature of fossil fuels have driven the world to adopt sustainable and renewable energies. Electrochemical energy conversion and storage systems are considered as such energy sources. As a bridge between high‐power‐output conventional capacitors and high‐energy‐density batteries, supercapacitors (also known as ultracapacitors or electrical double layer capacitors) are an ideal electrochemical energy‐storage system, suitable for rapid storage and release of energy. In comparison with that of batteries, the energy density of supercapacitors is much lower. Therefore, improving the energy density without sacrificing the high power density of supercapacitors has been a key research direction in developing high‐performance supercapacitor devices. The properties of the active electrode materials, including surface area, pore size, pore connectivity, electric conductivity, and surface chemistry, play a crucial role in determining the ultimate performance of the supercapacitor. This article presents an overview of literature data on supercapacitor electrode materials. With a brief description of the structure and energy‐storage mechanism of supercapacitors, recent advancements in electrode materials including carbon‐based materials (e.g., activated carbon, templated carbon, carbon nanotubes, graphene), transition‐metal oxides, and conducting polymers are summarized and discussed.

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Supercapacitors Prepared from Melamine-Based Carbon

Cited by 503 publications

References 27 publications

Supercapacitors based on carbon materials and ionic liquids

Supercapacitors based on carbon materials and ionic liquids

Comparison of surface and bulk nitrogen modification in highly porous carbon for enhanced supercapacitors

Supercapacitors: Electrode Materials Aspects

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