| 摘要 |
PROBLEM TO BE SOLVED: To effectively improve a safety at high temperature and to secure an excellent safety at charge and discharge. SOLUTION: A cathode contains lithium carbonate and lithium complex oxide shown by the formula LixM(1-y)AlyO2, (where; 0.05<=x<=1.10, 0.01<=y<0.10, M is an element chosen from transition metal), and the ratio of the content of lithium carbonate to the content of lithium complex oxide is 1 weight % or higher but less than 5 weight %. |
