NOVELTY - An active material-electrolyte composite is obtained by providing a gelled electrolyte (15) on an electrode having an electrode material provided on a collector (14). The electrode material is obtained by mixing an active material (11), an electroconductive auxiliary agent (13), and a binder (12). The electrode material contains elemental sulfur or lithium-containing sulfide as a positive electrode active material. The gelled electrolyte consists of a mixture of lithium ion conductive electrolyte solution and swollen layer-like clay mineral, and an ether-type organic solvent.    USE - Active material-electrolyte composite e.g. positive electrode active material-electrolyte composite and negative electrode active material-electrolyte composite is used for all-solid-state lithium-sulfur secondary battery (all claimed) used as power supply for hybrid vehicle or electric vehicle.    ADVANTAGE - The leakage of electrolyte solution is suppressed using gelled electrolyte. The contact property of electrode active material particle and electrolyte is maintained, and safety of battery is improved. The elution of lithium sulfide in electrolyte is suppressed.    DETAILED DESCRIPTION - An active material-electrolyte composite is obtained by providing a gelled electrolyte on an electrode having an electrode material provided on a collector. The electrode material is obtained by mixing an active material, an electroconductive auxiliary agent, and a binder. The electrode material contains elemental sulfur or lithium-containing sulfide as a positive electrode active material. The gelled electrolyte consists of a mixture of lithium ion conductive electrolyte solution and swollen layer-like clay mineral, and an ether-type organic solvent. The electrode is subjected to vibration having intensity in which electrolyte is liquefied. An INDEPENDENT CLAIM is included for manufacture of active material-electrolyte composite.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of electrode.    Active material (11)    Binder (12)    Electroconductive auxiliary agent (13)    Collector (14)    Gelled electrolyte (15)