公开(公告)号：JPH10125336A

公开(公告)日：1998-05-15

申请号：JP26380097

申请日：1997-09-29

Applicant: IBM

Inventor： JOHN M COTTE ,  MADHAV DATTA ,  LAVINDLA SHENOI

IPC: H01M4/06 ,  H01M4/50 ,  H01M4/62 ,  H01M4/66 ,  H01M6/12 ,  H01M6/16 ,  H01M6/18 ,  H01M6/22 ,  H01M6/50

Abstract: PROBLEM TO BE SOLVED: To provide a primary lithium battery, which is particularly suited for use in a built-in self-powered portable device(SSPD) for a mobile communications and arithmetic unit, such as a radio-frequency identification tag, a PCMCIA card, or a smart card. SOLUTION: A battery 10 has a flexible and compact structure and preferably uses a solid-polymer electrolyte film 16, having a polyacrylonitrile matrix. The performance of the electrolyte film is optimized by controlling the amount of an aprotic organic solvent in the electrode film within the range of specified proportions. Thus, the performance characteristic of the battery almost approximates that of a conventional electrolyte but without safety problems related to the danger of electrolyte leakage, and shows increased performance at low ambient temperatures. The negative electrode of the battery is encapsulated in a polymer matrix and this excludes the danger of exposure caused by an in-lithium compound used in the negative electrode.