Synthesis of hydrogen storage material constructed by mesoscopic carbon nitride

介观氮化碳储氢材料的合成

• 批准号: 13555187
• 负责人: SAITOH Hidetoshi
• 金额: $ 7.3万
• 依托单位: Nagaoka University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555187/
• 关键词: field emission; whisker; CVD; amorphous; carbon nitride; field emitter; MgO; tunnel effect; X線回折法; ラマン散乱分光方

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 storageMuch 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 nitrideCarbon nitride synthesized with CH_4-N_2 gas possesses an ability to store hydrogen to 2wt% at 77K.

与标准条件相比，储氢合金可以在10 ^体积下吸收氢<-3>。此外，它具有很高的爆炸安全性。因此，他们正在尝试应用于汽车储能材料。对于储氢合金来说，一个巨大的问题是它在每个重量下的能量储存较少。例如，稀土合金仅具有1 wt.%氢储存根据WE-NET计划，氢存储的目标已被确定为3 wt.%。1)利用电子回旋共振（ECR）等离子体增强化学气相沉积（CVD）技术制备了具有介观结构的碳氮化物储氢材料。将氮化碳材料置于12 MPa氢气气氛下。在该实验中，观察到0.5wt%的储氢。储氢扩展了氮化碳网络。高压处理后的样品中测得氢含量为35at%。2）储氢晶须结构的合成片状样品比晶须型样品吸收更多的氢。C：N=1：0.25的氮化碳非晶相显示1.1wt%的储氢量。电子自旋共振技术表明，含氮材料储氢后，未配对电子数减少，而不含氮材料储氢后未配对电子数不变。3）氮化碳储能基础实验用CH_4-N_2气合成的氮化碳在77 K下具有2wt%的储氢能力。

项目成果

Y.Ohkawara, S.Oshio, T.Suzuki, H.Ito, K.Yatsui, H.Saitoh: "Quantitative analysis of hydrogen in amorphous films of hydrogenated carbon nitride"Japanese Journal of Applied Physics. 40・12. 7007-7012 (2001)

Y.Ohkawara、S.Oshio、T.Suzuki、H.Ito、K.Yatsui、H.Saitoh：“氢化碳氮化物非晶膜中氢的定量分析”日本应用物理学杂志40・12。 (2001)

Y.Ohkawara, K.Kusaka, K.C.Namiki, S.Ohshio, A.Higa, M.Toguchi, H.Saitoh: "Hydrogen storage phenomenon in amorphous phase of hydrogenated carbon nitride"Japanese Journal of Applied Physics. 42・8. 5251-5254 (2003)

Y.Ohkawara、K.Kusaka、K.C.Namiki、S.Ohshio、A.Higa、M.Toguchi、H.Saitoh：“氢化碳氮化物非晶相中的储氢现象”日本应用物理学杂志42・8。 -5254 (2003)

Y.Ohkawara, H Akasaka, K.C.Namiki.S.Ohsiho, H.Ito, H.Saitoh: "Raman scattering spectroscopy of structure of amorphous carbon nitride films"Japanese Journal of Applied Physics. 42・1. 254-258 (2003)

Y.Ohkawara，H Akasaka，K.C.Namiki.S.Ohsiho，H.Ito，H.Saitoh：“无定形碳氮化物薄膜结构的拉曼散射光谱”日本应用物理学杂志42・1（2003）。

H.Ito, H.Miki, K.C.Namiki, N.Ito, H.Saitoh: "Dissociative excitation reaction of CH_3CN with the discharge flow of Ar : prediction of the [N]/([N]+[C]) ratio of hydrogenated amorphous carbon nitride films in the desiccated system"Japanese Journal of Appli

H.Ito, H.Miki, K.C.Namiki, N.Ito, H.Saitoh：“CH_3CN 与 Ar 放电流量的解离激发反应：氢化物的 [N]/([N] [C]) 比率的预测

Y.Ohkawara, S.Oshio, T.Suzuki, H.Ito, K.Yatsui, H.Saitoh: "Structure modification of hydrogenated carbon nitride films by high-energy He^<2+> irradiation"Molecule Crystal and Liquid Crystal. 386. 51-54 (2002)

Y.Ohkawara、S.Oshio、T.Suzuki、H.Ito、K.Yatsui、H.Saitoh：“高能He^<2>辐照对氢化碳氮化物薄膜的结构修饰”分子晶体和液晶。