T. H. Nam, Gyeongsang National University, Jinju, South Korea; S. Miyazaki, University of Tsukuba, Tsukuba, Japan
Ti-Ni alloys were found to have many advantages for fabricating secondary battery with high flexibility and high capacity which are required for mobile electrical appliances such as wearable computer because of their superelasticity and high corrosion resistance. An electrode using Ti-Ni alloys showed the superelasticity available for realizing highly flexible secondary battery. Ti-Ni alloys simplified the process for fabricating electrodes because Ti and Ni sulfides which are typical cathode materials in Li battery were easily formed on the surface of Ti-Ni alloys by annealing under sulfur atmosphere, while typical electrodes were fabricated via several fabrication processes such as mixing, pasting, drying. In this presentation we will introduce various electrode system, such as sulfide/Ti-Ni, LiNiTiO2/Ti-Ni and Si/Ti-Ni electrodes. In the sulfide/Ti-Ni electrode, Ti and Ni sulfides acted as a cathode and Ti-Ni substrates acted as a current collector. In the silicon/Ti-Ni electrode, Si acted as an anode and Ti-Ni substrates acted as a current collector. In the LiNiTiO2/Ti-Ni electrode, LiNiTiO2 acted as an anode and Ti-Ni substrates acted as a current collector. The electrode showed a clear charge-discharge behavior with high capacity. The superelasticity of Ti-Ni alloys improved electrochemical properties of the battery by accommodating large volume change during electrochemical reaction. In this presentation, we will present recent experimental results from some feasibility studies on applications of Ti-Ni alloys for secondary batteries.
Summary: This presentation will present experimental results from some feasibility studies on applications of Ti-Ni alloys to secondary batteries and show that Ti-Ni alloys have great advantages in flexible secondary battery field.
