Proposed thin film battery is comprised of a polymer-lithium ion cell material with barrier-layer packaging and
mechanical reinforcing layers. A semi-solid/ solid electrolyte and a mesoporous polymer separator are sandwiched in
between of anode and cathode. A composite film with a carbon nanotube (CNT) network serves as the anode and a
mesoporous transitional metal oxide LixCoO2 as the cathode, where porous metal sheets serve as the current collector.
The CNT network fabrics have high in-plane tensile strength. LiCoO2 is used as the cathode, because the Co atoms do
not migrate to Li layers, so that cathode does not generate flammable gases during charging that create safety problems.
Merit of this study is using the porous metal sheet, which is flexible, lightweight, low electric resistance, high strength
and strong stability in alkaline solution. This paper presented development of electrolyte for laminated polymer lithium
rechargeable battery. Two-type electrolytes, semi-solid and solid, were attempted; high ionic conductivity of Li ion
electrolytes was achieved.
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