Fabrication of superelastic NiS/TiNi electrode/current collector materials
Ni sulfides were formed on a Ni-deposited Ti-50.0Ni (at) alloy by annealing under a sulfur pressure of 100kPa at 673K for 0.36ks. Martensitic transformation, superelasticity and electrochemical properties were characterized using different techniques. Ni sulfides consisting of NiS and NiS2 of thickness 0.8μm were formed by a reaction between Ni and S. Some spherical particles and pores were found in the sulfides. A Ti-50.0Ni alloy with Ni sulfide surface layers showed a two-stage B2-R-B19 transformation behavior. A partial superelasticity with a superelastic recovery ratio of 78％ found in a current collector showed a clear discharge behavior with a voltage plateau between 1.3-1.6V. Discharge capacities of the Ni sulfide cathode decreased largely from 700 to 510mAh (g-NiS2)-1 with increasing number of cycles up to 3, above which it decreased gradually.
H S Kim G B Cho K W Kim K K Cho Y Liu T H Nam
Division of Advanced Materials Engineering, ERI and i-cube center, Gyeongsang National University, 9 Department of Mechanical Engineering, University of Western Australia, Crawley, WA 6009, Australia
国际会议
第二届功能原料国际研讨会(The 2rd International Symposium on Functional Materials)
杭州
英文
85-90
2007-05-16（万方平台首次上网日期，不代表论文的发表时间）