Title :
Electrochemical chracteristics of all solid state rechargeable thin film lithium batteries fabricated on a polymer substrate
Author :
Lee, Y.J. ; Lee, S.M.
Author_Institution :
Dept. of Adv. Mater. Sci. & Eng., Kangwon Nat. Univ., Chuncheon, South Korea
Abstract :
The multilayer films of LiCoO2/M/LiCoO2/M/LiCoO2 structure were prepared by a magnetron sputtering without post-annealing. The as-deposited multilayer films exhibited a nanocrystalline structure, which is similar to that of LiCo2 single layer films. Electrochemical performances of the LiCoO2/M multilayer films and a LiCoO2 single layer film were investigated at a current density ranging from 30 to 1000 uA/cm2, in which for those samples, the total thickness of LiCoO2 layer is about 4.2 ??m. The enhanced rate capability in the LiCoO2/Ag, Pt multilayer films is mainly ascribed to the increase of the electronic conductivity. We have fabricated the all solid state thin film batteries for polymer substrate. As a result, we confirmed high initial irreversible capacity and low cycle ability because of interface and structure instability.
Keywords :
cobalt compounds; current density; electrochemical electrodes; lithium compounds; polymers; secondary cells; sputtering; thin films; LiCoO2; current density; electrochemical characteristic; electronic conductivity; magnetron sputtering; multilayer film; nanocrystalline structure; polymer substrate; post-annealing; single layer film; solid state rechargeable thin film lithium batteries; structure instability; Batteries; Current density; Lithium; Magnetic multilayers; Nanostructures; Nonhomogeneous media; Polymer films; Solid state circuits; Sputtering; Substrates;
Conference_Titel :
Plasma Science - Abstracts, 2009. ICOPS 2009. IEEE International Conference on
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2617-1
DOI :
10.1109/PLASMA.2009.5227260
