AVS 53rd International Symposium
    Thin Film Wednesday Sessions
       Session TF-WeA

Paper TF-WeA8
Growth and Electrochemical Properties of Li-Ni-Co-Al Oxide Films

Wednesday, November 15, 2006, 4:20 pm, Room 2022

Session: Thin Films for Energy Applications in Photovoltaics, Fuel Cells, Hydrogen Storage & Batteries
Presenter: C.V. Ramana, University of Michigan
Authors: C.V. Ramana, University of Michigan
K. Zaghib, Institut de Recherches d'Hydro-Quebec
C.M. Julien, Universite Pierre et Marie Curie
Correspondent: Click to Email
There is a constantly increasing demand for miniaturized high energy density batteries to power microsystems such as microsensors, smart cards, implantable medical devices, intelligent labels, and so on. From this view point, there has been particular interest in solid-state lithium batteries fabricated by thin-film technology. The present work deals with the growth and electrochemical properties of the Li(Ni,Co,Al)O@sub 2@ films grown using pulsed laser deposition (PLD). The investigations revealed that the the growth and microstructure of the films is highly dependent on the substrate material, the growth temperature, and the gas pressure during ablation. The charge-discharge process conducted in Li-microcells demonstrates that effective high specific capacities can be obtained with films 1.35 µm thick. Stable capacities of 83 and 92 µAh/cm@sub 2@µm are available in the potential range 4.2-2.5 V for LiNi@sub 0.8@Co@sub 0.2@O@sub 2@ and LiNi@sub 0.8@Co@sub 0.15@Al@sub 0.05@O@sub 2@ films, respectively. A comparison of the electrochemical performance of microcells using films deposited on Si and Ni is also made. The results obtained will be presented and discussed.