2003 Fiscal Year Final Research Report Summary
Synthesis of hydrogen storage material constructed by mesoscopic carbon nitride
| Project/Area Number |
13555187
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
SAITOH Hidetoshi Nagaoka University of Technology, Faculty of Engineering, Professor, 工学部, 教授 (80250984)
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| Co-Investigator(Kenkyū-buntansha) |
OHSHIO Shigeo Nagaoka University of Technology, Faculty of Engineering, Technician, 工学部, 教務職員 (90160473)
ITO Haruhiko Nagaoka University of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (70201928)
YATSUI Kiyoshi Nagaoka University of Technology, Extreme Energy-Density Research Institute, Associate Professor, 極限エネルギー密度工学研究センター, 教授 (80029454)
ISHIKURA Yoshifumi Tokyo gas, Frontier technology institute, Researcher, フロンティアテクノロジー研究所, 研究員
SUZUKI Tsuneo Nagaoka University of Technology, Extreme Energy-Density Research Institute, Associate Professor, 極限エネルギー密度工学研究センター, 助手 (00313560)
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| Project Period (FY) |
2001 – 2003
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| Keywords | field emission / whisker / CVD / amorphous / carbon nitride / field emitter / MgO / tunnel effect |
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| Research Abstract |
Hydrogen storage alloys can absorbs hydrogen under 1O^<-3> volume comparing to standard conditions. In addition they has high safety for explosion. Therefore they are trying to apply for the automobile energy storage materials. A huge problem for the hydrogen storage alloy is its less energy storage at each weight. For example, rare-earth alloys possess only 1wt.% hydrogen storage. According to a WE-NET plan, an aim of the hydrogen storage has been decided to 3 wt.%.
1)Development of hydrogen storage carbon nitride with mesoscopic scale structure.
Carbon nitride material was synthesized using an electron cyclotron resonance(ECR) plasma enhanced chemical-vapor-deposition apparatus. The carbon nitride material was placed under 12 MPa hydrogen atmosphere. In this experiment, hydrogen storage of 0.5wt% was observed. The hydrogen storage expanded carbon nitride network. A value of 35at% hydrogen was determined in the sample after high pressure treatment.
2)Synthesis of whisker structure for hydrogen storage
Much more hydrogen absorption was observed on the flake-type sample than the whisker-type sample. The amorphous phase of carbon nitride with C:N=1:0.25 indicated 1.1wt% hydrogen storage. The electron spin resonance technique suggests that although the number of the unpaired electron decreased after hydrogen storage for the nitrogen-containing material, it unchanged for the no nitrogen-containing material.
3)Fundamental experiment for energy storage of carbon nitride
Carbon nitride synthesized with CH_4-N_2 gas possesses an ability to store hydrogen to 2wt% at 77K.
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