摘要
采用球磨后再烧结方法制备出石墨烯改性钒基储氢电池负极材料,并进行材料的物相组成、显微组织、吸放氢性能和循环稳定性的测试与分析。结果表明:该材料由V基固溶体主相、呈三维网状结构分布的Ti Ni相以及呈弥散状分布的石墨烯组成,具有较佳的吸放氢性能和循环稳定性。与相同方法制备的V3Ti Ni0.56相比,该材料的最大吸氢量增加16.4%,放氢平台压力相当,20次充放电循环后的放电容量衰减率从92.8%减小至6.7%。
The vanadium based hydrogen storage battery anode material modified with graphene was prepared by the method of sintering after ball milling,and the phase composition,microstructure,hydrogen absorption and desorption properties,and cycling stability of the anode material were tested and analyzed. The results show that the material is composed of vanadium-based solid solution as main phase,Ti Ni phase with three-dimensional network structure and graphene with diffuse distribution,having better hydrogen absorption and desorption properties and cycling stability. Compared with V3 Ti Ni0. 56 prepared by the same method,the maximum hydrogen adsorption of this material could increase by 16. 4% with comparative hydrogen platform pressure and its decay rate of discharge capacity after 20 times of charge and discharge cycles could decrease from 92. 8% to 6. 7%.
出处
《钢铁钒钛》
CAS
北大核心
2016年第2期50-54,共5页
Iron Steel Vanadium Titanium
基金
重庆市高等教育教学改革研究项目(JG142012)
重庆市教委科学技术研究项目资助(KJ1503311)
关键词
钒基储氢电池
负极材料
石墨烯改性
吸放氢性能
循环稳定性
vanadium based hydrogen storage battery
anode material
modification with graphene
hydrogen absorption and desorption properties
cycling stability
