著者

辻村 清也

出版者

炭素材料学会

雑誌

炭素 (ISSN:03715345)

巻号頁・発行日

vol.2014, no.265, pp.195-203, 2014-11-15 (Released:2014-12-15)

参考文献数

88

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In this review, recent developments in enzymatic biofuel cell (EBFC) technology are reviewed. A general introduction to EBFCs, including their operating principles and applications, is provided. The electron transfer mechanism, mediator and enzyme materials (anode and cathode) are discussed. EBFCs are promising for sustainable green energy applications; however, they are still at an early stage of development, with many yet-to-be-resolved fundamental scientific and engineering problems. Two critical problems are short lifetime and poor power density, both of which are related to enzyme stability, electron transfer rate, and enzyme loading. To achieve the practical application of EBFCs, a promising approach is to use porous carbon materials as enzyme supports. Strategies for the design of hierarchically structured supports with both mesopores and macropores are considered. The large surface area of these mesoporous materials can increase the enzyme loading and electron transfer efficiency. The macropores enable efficient biocatalyst and fuel transport. The essential properties of the resulting materials with respect to the EBFC application are also discussed. A combination of electron transfer technology and porous carbon material would be helpful in achieving a much higher and stable current output, thus contributing to a practical advance in the sustainable energy field.

著者

仙石 正

出版者

炭素材料学会

雑誌

炭素 (ISSN:03715345)

巻号頁・発行日

vol.3, no.2, pp.72-76, 1953-05-04 (Released:2010-06-28)

参考文献数

10

著者

岡村 迪夫

出版者

炭素材料学会

雑誌

炭素 (ISSN:03715345)

巻号頁・発行日

vol.2000, no.194, pp.268-275, 2000-10-05 (Released:2010-06-28)

参考文献数

13

被引用文献数

3

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An invention of the new physical battery called ECS (Energy Capacitor System) composed from specially made capacitors and electronic circuits, has opened up profound applications and possibilities. Copernican revolution indesign of energy storage capacitors is provided by trading off their internal resistance with energy density, and by charging slowly as to obtain better efficiency. Many problems inherent to capacitors such as inefficient charging, wide variation of terminal voltage and unequal distribution of voltage to each capacitors have been solved by attached electronic cirCapacitors for the system are also specially developed. With the electronic circuits, capacitors accommodate the energy density of 10Wh/1 at 2ΩF (ohms for each farad) and 18 Wh/1 at 108ΩF. Various applications are tested ranging from solar system to home air conditioner. Power load leveler is supported by Japanese national project, a 3kWh system is built and resulted 85% AC to AC, 95% DC to DC efficiency together with record cell energy density of 27 Wh/l. A 15ton Hybrid bus powered by a 75kW ECS with a 75kW generator produced and resulted almost twice improvements of fuel mileage.