Solid ion conductor compound solid electrolyte comprising the same electrochemical cell comprising the same and preparation method thereof

• Main Authors: KIM, SO YEON, KIM, HYUN SEOK, LEE SEOK SOO, RYU, SAE BOM, KITAJIMA SHINTARO
• Format: Patent
• Language: English; Korean
• Published: 18.08.2021
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; CONDUCTORS; ELECTRICITY; INORGANIC CHEMISTRY; INSULATORS; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES

The present invention relates to a solid ion conductor compound represented by chemical formula (1) and having an azirodite-type crystal structure, a solid electrolyte comprising the same, an electrochemical cell comprising the same, and a manufacturing method thereof. In the chemical formula 1: Li_xP_yM1_vS_zM2_wM3_w, M1 is an element substituted at the P site, and is an element whose ionic radius is larger than that of P. M2 and M3 are different elements selected from the group 17 of the periodic table and 4 <= x <= 8, 0 < y < 1, 0 < v <= 1, 0 < z < 6, 0 < w < 3, 0 <= w^' <3, and y >= v. The present invention relates to a solid ion conductor compound having improved activation energy, moisture stability and oxidation stability by having a new composition. 하기 화학식 1로 표시되며, 아지로다이트형 결정 구조를 가지는 고체이온전도체 화합물, 이를 포함하는 고체전해질, 이를 포함하는 전기화학 셀 및 이의 제조방법이 제시된다: <화학식 1> LixPyM1vSzM2wM3w' 상기 식에서, M1은 P 자리에 치환된 원소로서, 이온반경이 P의 이온반경보다 큰 원소이며, M2 및 M3는 주기율표 17족에서 선택된 서로 다른 원소이며, 4≤x≤8, 0<y<1, 0<v<1, 0<z<6, 0<w<3, 0≤w'<3, 및 y≥v이다.