A high-capacity type of all solid-state battery was developed using sulfur electrode and the thio-LISICON electrolyte. New nano-composite of sulfur and acetylene black (AB) with an average particle size of 1-10 nm was fabricated by gas-phase mixing and showed a reversible capacity of 900 mAh g(-1) at a current density of 0.013 mA cm(-2). (C) 2008 Elsevier B.V. All rights reserved.