Yoshinori Kanamori

Thin Film Solid‐State Lithium Batteries Prepared by Consecutive Vapor‐Phase Processes

Thin-film solid-state lithium batteries of total thickness less than 20 {mu}m were prepared. These thin lithium batteries were fabricated using a thin film of TiS{sub 2} prepared by chemical vapor deposition (CVD) as the cathode active material, a thin film of solid polymer prepared by plasma polymerization as the electrolyte, and a thin film of lithium deposited by thermal evaporation as the anode. The solid polymer electrolyte film was formed by complexation of plasma-polymerized tris (2-methoxyethoxy) vinylsilane with lithium perchlorate. Its room temperature conductivity was greater than 10{sup {minus}6} S cm{sup {minus}1} (10{sup 2} {Omega} cm{sup 2} resistance per unit area). The batterys discharge properties at room temperature and different current densities were examined. In this paper the effects of the interfaces between the solid polymer electrolyte and the electrodes on the batterys discharge performance are discussed.

Target temperature dependence of charge state distributions of fast He ions emerging from solids

Abstract We have measured the charge state distributions of fast helium ions backscattered from various thick targets which are kept at high temperature. For metal targets the charge state distributions start to change at about 400°C and reach equilibrium at about 800°C. Furthermore, it has been also found that these equilibrated charge state distributions at high temperature depend strongly on the target materials. We have assumed that the variation of charge state distributions at various temperatures corresponds to the variation of the thickness of the contaminating layer of light atoms and have estimated the thickness of the adsorbed layer on the target surface at different temperatures. Measurements have also been made for Bi and Sn targets in liquid states.

Zt dependence of equilibrium charge state distributions of MeV He ions emerging from solid

The equilibrium charge state distributions of He ions emerging from various solid targets were measured in the energy range 0.6-2.4 MeV. Atomically clean target surfaces were prepared by continuous evaporation for Ga, Ge, Se and In, and by heating for Sc, Fe, Ta, W and Pt. The measured charge fractions Fi (i=0, 1, 2) were tabulated at 0.2 MeV intervals. In this energy range, the ratio F1/F2 is represented fairly well by the empirical formula AE-B, where E is the energy and A and B are target-dependent constants. The present data, together with the previous data, show clearly oscillatory behaviour of the equilibrium mean charge of He ions with target atomic number Zt. This oscillation is found to be attributed to the shell structure of the target atom.

Equilibrium charge state distributions of MeV He ions backscattered from continuously evaporated targets

The equilibrium charge state distributions of He ions emerging from surfaces of Pb, Sn and Al targets were measured in the energy range 0.8-2.3 MeV. Fresh surfaces of these targets were prepared by continuous evaporation during the measurement. As the evaporation rate was increased, charge state distributions changed gradually and reached the equilibrium ones which were characteristic of the respective targets. The results were compared with the calculation based on the gas model using Bohrs cross sections. The present data support oscillatory behaviour of mean charge with increasing target atomic number.

Preparation of ultra-thin solid-state lithium batteries utilizing a plasma-polymerized solid polymer electrolyte

Ultra-thin solid-state lithium batteries were fabricated using a thin polymer electrolyte film prepared by hybridization of the plasma polymer formed from tris(2-methoxyethoxy)vinylsilane and LiClO4, a thin TiS2 film prepared by chemical vapour deposition as a cathode active material, and a vapour-deposited lithium thin film.

Electron Capture Cross Sections in High Energy He2++Li° Collisions

Single and double electron capture cross sections for He 2+ in collision with Li° have been measured in the energy range of 0.8–2.0 MeV. The lithium target density was absolutely determined by the Rutherford scattering measurement. The results are consistent with the recent data measured at lower energies.

Single and double electron-loss cross sections of metastable- and ground-state neutral helium

Abstract Ratios of electron-loss cross sections of metastable-state to ground-state He 0 projectiles have been measured for a collision with rare gas atoms at the energies 0.8, 1.0 and 1.5 MeV, and found to be less than and greater than unity for double electron-loss and for single electron-loss, respectively.