NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

PROBLEM TO BE SOLVED: To make a current cut-off mechanism sufficently function in overcharging in a nonaqueous electrolyte secondary battery. SOLUTION: A positive electrode contains one type or more of aromatic hydrocarbon in the range of 5 to 10wt.% selected from naphthalene, anthracene and phenant...

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Bibliographic Details
Main Authors YAMAMOTO KOHEI, NAGURA HIDEAKI, HARADA YOSHIRO, SUZUKI TAKASHI
Format Patent
LanguageEnglish
Published 05.09.1997
Edition6
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:PROBLEM TO BE SOLVED: To make a current cut-off mechanism sufficently function in overcharging in a nonaqueous electrolyte secondary battery. SOLUTION: A positive electrode contains one type or more of aromatic hydrocarbon in the range of 5 to 10wt.% selected from naphthalene, anthracene and phenanthrene. In overcharging, aromatic hydrocarbon contained in the positive electrode is polymerized and covers the whole front surfaces of particles of lithium composite oxide as a positive electrode active material. As a result, internal pressure of a battery is raised under the relative slow condition, and cut-off of current is reliably performed by a current cut-off mechanism. Moreover, the capacity of discharge is hardly decreased.
Bibliography:Application Number: JP19960033430