溶融塩電析・合金化プロセスによるMg系水素吸蔵合金薄膜の作成と水素吸蔵特性

熔盐电沉积/合金化工艺制备镁基储氢合金薄膜及其储氢性能

• 批准号: 10750539
• 负责人: 黒田 健介
• 金额: $ 1.47万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Encouragement of Young Scientists (A)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10750539/
• 关键词: 水素吸蔵合金; 溶融塩電解; Mg_2Ni; Mg_2Cu; 薄膜

薄膜状の水素吸蔵合金を製造する従来のプロセスでは,いずれも(1)取扱いの難しい活性金属を使用する,(2)大面積化が困難,といった実用化に向けての難題を抱えている.そこで本研究では,バルク状合金に比べ大面積化,形状の自由度の向上が図れる薄膜状の水素吸蔵合金を溶融塩電析法を用いて作成し,その水素吸蔵・放出ならびに劣化・微粉化特性を評価することを目的とした.合金膜生成法として溶融塩電析・合金化プロセスなる新規の方法を取り上げる.本研究では,合金の「軽量化」に着目し,Ni基板(あるいはCu基板)上に種々の条件(電析温度,電流密度,時間)下においてMgを電析させ,Mg_2Ni(あるいはMg_2Cu)水素吸蔵合金薄膜を作成し,効果的な合金生成条件を決定した.すなわち,条件の如何によっては,単層の合金膜が生成せず,Mgが表面上に残存する場合や水素吸蔵合金以外の金属間化合物が確認された.一方,合金生成メカニズムの解明の目的で,電析後の基板の開回路電位(open circuitpotential)の推移ならびにcyclic voltammetoryの計測を行い,生成合金とそれが安定に存在しうる電位を平衡論的,速度論的に決定した.さらに生成した水素吸蔵合金の水素吸蔵・放出評価をアルカリ水溶液中で行ったところ,水素放出特性が極めて劣ることが分かった.

The thin film water absorption alloy is used to increase the temperature, (1) to use the active metal (1) to use the active metal, (2) to make the large surface active metal, and (2) to use the water absorption alloy in the thin film. In this study, the shape of the alloy is more active than that of the surface, and the degree of freedom of the shape is higher than that of the film-like water-absorbing alloy, which is made by the method of dissolving and analyzing, and the water absorption is released from the powder. Alloy film formation method, melting method, electroanalysis, alloying method, new rule method, high temperature, high temperature, high In this study, the alloy was "quantified". Under several conditions (electrolysis temperature, current density, time) on the Ni substrate (temperature, current density, time), the Mg_2Ni (thermal conductivity Mg_2Cu) water-absorbing alloy film was prepared, and the formation conditions of the alloy were determined. How to determine the temperature of the alloy film, the residual metal on the surface of the Mg alloy and the intermetallic compounds other than the water-absorbing alloy. On the one hand, the alloy generates a critical potential to explain the purpose, and after the electroanalysis, the substrate turns off the circuit potential (open circuitpotential) to improve the performance of the cyclic voltammetory calculation, and the alloy stability exists in the differential potential equilibrium theory, which determines the speed theory. The formation of water absorption alloy, the release of water absorption, the release of water in aqueous solution, the emission characteristics of water, the poor quality of water absorption, the release of water in aqueous solution.