Preparation of thick-film LiNi1/3Co1/3Mn1/3O2 electrodes by aerosol deposition and its application to all-solid-state batteries

We prepared thick and dense-crystalline LiNi1/3Co1/3Mn1/3O2 (NMC) composite films at room temperature that can work well as cathodes in all-solid-state battery cells. The thick films were fabricated by aerosol deposition using NMC powder (D50 = 10.61 mu m) as a source material. Commercially-obtained NMC powder did not form films at all on silicon wafer substrates, and cracking of the substrates was observed. However, a few tens of nanometer coating with amorphous niobium oxide resulted in the deposition of 7 mu m-thick crystalline dense composite films. The films were successfully fabricated also on Li+-conductive glass-ceramic sheets with 150 mu m in thickness, and all-solid-state batteries were fabricated. The solid-state battery provided a cathode-basis discharge capacity of 152 mAh g(-1) (3.0-4.2 V. 0.025 C, 333 K) and repeated charge-discharge cycles for 20 cycles. (C) 2014 Elsevier B.V. All rights reserved.