Metadata
Author: patents-wipo
Data
English[en]
The present invention relates to a positive electrode active material for a secondary battery, and specifically the positive electrode active material for a secondary battery according to the present invention contains a sodium transition metal pyrophosphate satisfying Na3.12-x2Acx1M1ay1M2by2(P2O7)2, has structural stability due to a strong P-O bond in the olivine structured sodium transition metal phosphate, and involves the smooth insertion and removal of sodium ions having a large ion radius, markedly improving the charge and discharge speed and reversibility during charge and discharge.
French[fr]
La présente invention concerne un matériau actif d'électrode positive pour une batterie secondaire, ce matériau actif d'électrode positive pour une batterie secondaire selon l'invention contenant spécifiquement un pyrophosphate de métal de transition sodique satisfaisant à Na3,12-x2Ac x1M1 a y1M2 b y2(P2O7)2, possédant une stabilité structurelle en raison d'une forte liaison P-O dans le phosphate de métal de transition sodique à structure olivine, et impliquant l'insertion et l'élimination en douceur des ions sodium présentant un large rayon ionique, ce qui améliore notablement la vitesse de charge et de décharge ainsi que la réversibilité durant la charge et la décharge.
Korean[ko]
본 발명은 이차전지용 양극 활물질에 관한 것으로, 상세하게, 본 발명에 따른 이차전지용 양극 활물질은 Na3.12-x2Acx1M1ay1M2by2(P2O7)2을 만족하는 나트륨 전이금속 피로인산염을 함유하며, 올리빈 구조의 나트륨 전이금속 인산염이 갖는 강한 P-O 결합에 따른 구조적 안정성의 장점을 가지면서도, 이온 반경이 큰 Na 이온의 원활한 삽입 및 탈리가 수행되어 충방전시의 가역성 및 충방전 속도를 현저하게 향상시킬수 있는 장점이 있다.