| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a non-aqueous lithium secondary battery which has a small irreversible capacity and is superior in charge and discharge characteristics and durability. <P>SOLUTION: This is the non-aqueous lithium secondary battery which uses at least a positive electrode having a positive electrode material that stores and releases lithium reversibly, a negative electrode having a negative electrode material that stores and releases lithium reversibly, and a non-aqueous electrolyte. Alkyl lithium carbonate as expressed by chemical structure formula (I), (II) hereunder is added in at least one of the positive electrode and the non-aqueous electrolyte. (I): R1-OCO<SB>2</SB>Li, (II): Li-CO<SB>2</SB>O-R2-OCO<SB>2</SB>Li, ( wherein, R1 and R2 show alkyl group having carbons 1-4). It is preferable that the added quantity of the alkyl lithium carbonate is the same mole number as the lithium quantity corresponding to the irreversible capacity of the negative electrode or less. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
