화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.26, No.3, 287-293, June, 2015
DOI10.14478/ace.2015.1026  Export Citation
층상구조기반의 리튬이차전지용 양극 활물질에 관한 특허정량분석
Quantitative Analysis of Patents Concerning Cathode Active Materials for Lithium-Ion Secondary Batteries Based on Layer Structure
김병남, 임용환1, 이철태1, †
  • 단국대학교 공학교육혁신센터
  • 1단국대학교 화학공학과
Byung-Nam Kim, Yong-Hwan Lim1, and Chul-Tae Lee1, †
  • Center for Innovative Engineering Education, Dankook University, Gyeonggi 448-701, Korea
  • 1Department of Chemical Engineering, Dankook University, Korea
E-mail:
초록
본 논문은 층상구조에 기반을 둔 리튬 2차 전지용 양극 활물질 관련 기술에 대한 특허정량분석에 관한 것으로, 우리나라 356건, 미국 1,628건, 일본 2,915건, 유럽 439건, PCT (WO) 611건 등 등록/공개된 5,000여 건의 특허를 분석하였다. 본 특허정량분석을 통해 1991년도부터 2013년까지의 리튬 코발트 개량기술, 대체 기술의 경향을 분석하였으며, 우리나라, 미국, 일본 유럽 등 주요국별로 리튬이차전지 기술의 특허 점유율을 구하였다. 그중 차세대 리튬이차전지 기술로 부상하고 있는 구조 혼합 기술 관련 특허는 2000년에 다수 출원되기 시작하여 2005년도에는 SANYO (34.5% 점유), SONY (17.5% 점유), LG (7% 점유) 및 SAMSUNG (5.5% 점유)을 필두로 많은 특허가 출원되었다. 마지막으로 성분 계별 공정 분포도를 버블차트로 작성하여 분야별 연구 집중도를 확인하였다.
This paper discusses quantitative analyses of patents published for cathode active materials for lithium secondary batteries based on layer structure. Numbers of the patents analyzed were 356, 1628, 2915, 439, and 611 for Korea, USA, Japan, Europe, and PCT (WO), respectively. Trends of improved technologies and alternative technologies concerning lithium cobalt, from 1991 to 2012 were examined and the patent shares distribution of each principal countries about lithium secondary battery technologies were also scrutinized. The number of patents for the mixed structure technology and next-generation lithium secondary battery technology increased numerously in 2000. Particularly in 2005, lots of patents were also published and SANYO (34.5%), SONY (17.5%), LG (7%), and SAMSUNG (5.5%) possessed leading patent applicants. Finally, the research focus on cathode active materials for lithium secondary batteries was confirmed by bubble chart distributions for component-by-step process.
Keywords:Lithium battery;Layer structure;Cathode material;Patent;Quantitative analysis
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