Electrophoretic Fabrication of Rechargeable Micro Lithium-Ion Battery with 3D Configuration
A polymer wall was developed between interdigitated comb-type current collectors on a SiO2/Si substrate as the support for three-dimensionally (3D) accurate deposition of electrode materials by electrophoretic deposition (EPD) method. As anode and cathode materials, Li4Ti5O12 and LiCoO2 with a particle size of ~ 200 nm were synthesized, respectively, and their dispersibility in the suspensions including Ketjen Black and poly (vinylidene fluoride) was investigated. Consequently, N-methylpyrrolidone provided their good suspensions, and an electrode aspect ratio of 1:1, which can provide a high capacity and good rate performance to micro lithium-ion batteries, was successfully achieved in both Li4Ti5O12 composite anode and LiCoO2 composite cathode.
A. R. Boccaccini, O. Van der Biest, R. Clasen and J.H. Dickerson
H. Munakata et al., "Electrophoretic Fabrication of Rechargeable Micro Lithium-Ion Battery with 3D Configuration", Key Engineering Materials, Vol. 507, pp. 163-167, 2012