All SOLID LITHIUM SECONDARY BATTERY COMPRISING INTEGRATED CATHODE COMPOSITE MATERIAL AND METHOD FOR PREPARING SAME

• Main Authors: KIM HO SUNG, HEO KOOK JIN, PARK JAE YOUNG, KIM MIN YOUNG, KIM HOHYONG, LEE JEONGKWAN, SONG YOUNG WOONG, HWANG DAHEE, LIM JINSUB
• Format: Patent
• Language: English; Korean
• Published: 28.02.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention relates to an all-solid-state lithium secondary battery including: a positive electrode including a positive electrode composite material; a solid electrolyte layer formed on the positive electrode; and a negative electrode formed on the solid electrolyte layer, wherein the positive electrode composite material includes: a positive electrode active material represented by chemical formula 1; a solid electrolyte represented by chemical formula 2; and a metal oxide represented by chemical formula 3. The all-solid-state lithium secondary battery of the present invention and a manufacturing method thereof improve energy density and energy efficiency by applying an integrated positive electrode composite material including a positive electrode active material, a solid electrolyte and a metal oxide. 본 발명은 양극복합소재를 포함하는 양극; 상기 양극 상에 형성된 고체전해질층; 및 상기 고체전해질층 상에 형성된 음극;을 포함하고, 상기 양극복합소재가 화학식 1로 표시되는 양극활물질; 화학식 2로 표시되는 고체전해질; 및 화학식 3으로 표시되는 금속산화물;을 포함하는 것인, 전고체 리튬이차전지에 관한 것이다. 본 발명의 전고체 리튬이차전지 및 그의 제조방법은 양극활물질, 고체전해질 및 금속산화물을 포함하는 일체형 양극복합소재를 적용함으로써, 에너지밀도 및 에너지 효율을 향상시킬 수 있는 효과가 있다.