Non-aqueous electrolyte secondary battery
First Claim
1. A non-aqueous electrolyte secondary battery comprising:
- a positive electrode comprising a positive electrode current collector and a positive electrode material mixture layer formed thereon;
a negative electrode comprising a negative electrode current collector and a negative electrode material mixture layer formed thereon; and
a non-aqueous electrolyte, characterized in that(1) at least one of said positive and negative electrodes has a positive temperature coefficient of resistance,(2) said non-aqueous electrolyte contains an additive which is stable at the normal operating voltage range of said battery and is able to polymerize at the voltage exceeding the maximum value of said operating voltage range, wherein said additive is at least one selected from the group consisting of biphenyl, 3-chlorothiophene, furan, o-terphenyl, m-terphenyl, p-terphenyl, diphenyl ether, 2,3-benzofuran, bis(p-tolyl)ether, diallyl ether, allyl butyl ether, 3-phenoxy toluene and cyclohexyl benzene,(3) a resistivity at 120°
C. of at least one of said positive and negative electrodes is 107 Ω
·
cm or more, and(4) a resistance layer having a positive temperature coefficient of resistance is formed on a surface of at least one of said positive electrode current collector and said negative electrode current collector.
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Accused Products
Abstract
A non-aqueous electrolyte secondary battery comprising: a positive electrode comprising a positive electrode current collector and a positive electrode material mixture layer formed thereon; a negative electrode comprising a negative electrode current collector and a negative electrode material mixture layer formed thereon; and a non-aqueous electrolyte, characterized in that at least one of said positive and negative electrodes has a positive temperature coefficient of resistance; and said non-aqueous electrolyte contains an additive which is stable in the normal operating voltage range of said battery and is able to polymerize at the voltage exceeding the maximum value of said operating voltage range.
46 Citations
22 Claims
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1. A non-aqueous electrolyte secondary battery comprising:
- a positive electrode comprising a positive electrode current collector and a positive electrode material mixture layer formed thereon;
a negative electrode comprising a negative electrode current collector and a negative electrode material mixture layer formed thereon; and
a non-aqueous electrolyte, characterized in that(1) at least one of said positive and negative electrodes has a positive temperature coefficient of resistance, (2) said non-aqueous electrolyte contains an additive which is stable at the normal operating voltage range of said battery and is able to polymerize at the voltage exceeding the maximum value of said operating voltage range, wherein said additive is at least one selected from the group consisting of biphenyl, 3-chlorothiophene, furan, o-terphenyl, m-terphenyl, p-terphenyl, diphenyl ether, 2,3-benzofuran, bis(p-tolyl)ether, diallyl ether, allyl butyl ether, 3-phenoxy toluene and cyclohexyl benzene, (3) a resistivity at 120°
C. of at least one of said positive and negative electrodes is 107 Ω
·
cm or more, and(4) a resistance layer having a positive temperature coefficient of resistance is formed on a surface of at least one of said positive electrode current collector and said negative electrode current collector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a positive electrode comprising a positive electrode current collector and a positive electrode material mixture layer formed thereon;
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11. A non-aqueous electrolyte secondary battery comprising:
- a positive electrode comprising a positive electrode current collector and a positive electrode material mixture layer formed thereon;
a negative electrode comprising a negative electrode current collector and a negative electrode material mixture layer formed thereon; and
a non-aqueous electrolyte, characterized in that(1) said positive electrode has a positive temperature coefficient of resistance, (2) said non-aqueous electrolyte contains an additive which is stable at the normal operating voltage range of said battery and is able to polymerize at the voltage exceeding the maximum value of said operating voltage range, wherein said additive is at least one selected from the group consisting of biphenyl, 3-chlorothiophene, furan, o-terphenyl, m-terphenyl, p-terphenyl, diphenyl ether, 2,3-benzofuran, bis(p-tolyl)ether, diallyl ether, allyl butyl ether, 3-phenoxy toluene and cyclohexyl benzene, (3) a resistance layer having a positive temperature coefficient of resistance is formed on a surface of said positive electrode current collector, (4) said positive electrode current collector comprises aluminum and said resistance layer comprises a mixture of a conductive particulate material and a binder polymer, and (5) a resistivity at 120°
C. of said positive electrode is 107 Ω
·
cm or more. - View Dependent Claims (12, 13, 14, 15, 16)
- a positive electrode comprising a positive electrode current collector and a positive electrode material mixture layer formed thereon;
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17. A non-aqueous electrolyte secondary battery comprising:
- a positive electrode comprising a positive electrode current collector and a positive electrode material mixture layer formed thereon;
a negative electrode comprising a negative electrode current collector and a negative electrode material mixture layer formed thereon; and
a non-aqueous electrolyte, characterized in that(1) said negative electrode has a positive temperature coefficient of resistance, (2) said non-aqueous electrolyte contains an additive which is stable at the normal operating voltage range of said battery and is able to polymerize at the voltage exceeding the maximum value of said operating voltage range, wherein said additive is at least one selected from the group consisting of biphenyl, 3-chlorothiophene, furan, o-terphenyl, m-terphenyl, p-terphenyl, diphenyl ether, 2,3-benzofuran, bis(p-tolyl)ether, diallyl ether, allyl butyl ether, 3-phenoxy toluene and cyclohexyl benzene, (3) a resistance layer having a positive temperature coefficient of resistance is formed on a surface of said negative electrode current collector, (4) said negative electrode current collector comprises copper or nickel and said resistance layer comprises a mixture of a conductive particulate material and a binder polymers, and (5) a resistivity at 120°
C. of said negative electrode is 107 Ω
·
cm or more. - View Dependent Claims (18, 19, 20, 21, 22)
- a positive electrode comprising a positive electrode current collector and a positive electrode material mixture layer formed thereon;
Specification