摘要
采用新型夹层覆盖方法制备多层镁镍合金/镍钛合金/纯金属镁锭(Mg_2Ni/NiTi/Mg)烧结载体。此材料载体具有连续扩散层,大表面积和多孔的层状晶体结构,通过制备新的吸氢相镁镍合金(Mg_2Ni)和催化相镍钛合金(NiTi)提供强有力的化学通道来改善新型烧结体的吸放氢性能;结合晶体结构对储氢性能的优化进行详细讨论;建立最优化的可有效吸放氢的实验条件。在16min内,最大吸氢量达到5.3%(wt,质量分数,下同),最大放氢量达到2.0%,从而实现了储氢容量大、速度快目标,克服了以往传统方法易引起的容易粉化、不便活化的弊端。
The new type interlayer cover method was adopted to prepare the multilayered Mg2Ni/NiTi/Mg sintered carrier.The sintered carrier had a layered crystal structure with continuous diffused layers,larger surface area and porous,strong chemical channels were provided to improve the properties of hydrogen absorption/desorption by preparing new hydrogen absorbing phase Mg2Ni and catalytic phase NiTi. The optimization effect of crystal structure on the hydrogen absorption/desorption properties was discussed in detail. The optimized experimental conditions which could storage hydrogen effectively were established. The hydrogen storage amount of sintered body reached 5. 3%（ wt） and the maximum hydrogen desorption amount reached 2. 0%（ wt） within 16 min. So that achieved the goal of a large hydrogen storage capacity/fast speed,and overcame disadvantages of easing to chalking and inconveniencing to activate from the traditional methods.
出处
《化工新型材料》
CAS
CSCD
北大核心
2017年第7期48-49,53,共3页
New Chemical Materials
基金
国家自然科学基金(51402143)
关键词
复合结构
夹层覆盖方法
吸氢
放氢
composite structure
interlayer cover method
hydrogen absorption
hydrogen desorption
