Lithium ion secondary battery
First Claim
1. A lithium ion secondary battery comprising a positive electrode, a negative electrode, a non-aqueous electrolyte, a container sealing the electrodes and electrolyte therein, whereinthe positive electrode comprises a positive electrode active material having a spinel structure and the formula:
-
space="preserve" listing-type="equation">Li.sub.x Mn.sub.2-a M.sub.a/c O.sub.4+bWherein M is cation of a metal other than Li and Mn;
x, a and b are numbers satisfying the conditions of 0.1<
x≦
1.2, 0≦
a<
2.0, 1≦
c≦
3, and 0≦
b<
0.3, respectively, during its charge-discharge cycle;
the positive electrode is coated with a non-electron conductive protective layer comprising particles of a metal oxide and a polymer binder; and
the negative electrode comprises a negative electrode active material of a lithium alloy or an alloy into which a lithium ion can be intercalated.
3 Assignments
0 Petitions
Accused Products
Abstract
In a lithium ion secondary battery having a positive electrode, a negative electrode, a non-aqueous electrolyte, and a container, the positive electrode is made of a positive electrode active material having a spinel structure and the formula:
Li.sub.x Mn.sub.2-a M.sub.a/c O.sub.4+b
wherein M is cation of a metal other than Li and Mn; x, a and b are 0.1<x≦1.2, 0≦a<2.0 (preferably 0<a<2.0), 1≦c≦3, and 0≦b<0.3, during its charge-discharge cycle;
the positive electrode is coated with a non-electron conductive protective layer; and
the negative electrode is made of a negative electrode active material of a lithium alloy or an alloy into which a lithium ion can be intercalated.
121 Citations
15 Claims
-
1. A lithium ion secondary battery comprising a positive electrode, a negative electrode, a non-aqueous electrolyte, a container sealing the electrodes and electrolyte therein, wherein
the positive electrode comprises a positive electrode active material having a spinel structure and the formula: -
space="preserve" listing-type="equation">Li.sub.x Mn.sub.2-a M.sub.a/c O.sub.4+bWherein M is cation of a metal other than Li and Mn;
x, a and b are numbers satisfying the conditions of 0.1<
x≦
1.2, 0≦
a<
2.0, 1≦
c≦
3, and 0≦
b<
0.3, respectively, during its charge-discharge cycle;the positive electrode is coated with a non-electron conductive protective layer comprising particles of a metal oxide and a polymer binder; and the negative electrode comprises a negative electrode active material of a lithium alloy or an alloy into which a lithium ion can be intercalated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
Specification