Positive electrode material for lithium ion secondary battery, positive electrode for lithium ion secondary battery, and lithium ion secondary battery
View Patent ↗A positive electrode material for a lithium ion secondary battery contains a first compound represented by Li 3 V 2 (PO 4 ) 3 and one or more second compounds selected from vanadium oxide and lithium vanadium phosphate.
1. A positive electrode material for a lithium ion secondary battery, comprising:
a first compound represented by Li 3 V 2 (PO 4 ) 3 ; and
a second compound selected from vanadium oxide, lithium vanadium oxide, and lithium vanadium phosphate, wherein the content of the second compound relative to the first compound is 0.1 wt. % or more and 5 wt. % or less.
2. The positive electrode material for a lithium ion secondary battery according to claim 1 , wherein the second compound contains at least one of V 2 O 5 , LiV 2 O 4 , LiV 3 O 8 , and LiVOPO 4 .
3. The positive electrode material for a lithium ion secondary battery according to claim 1 , wherein the content of the second compound relative to the first compound is 0.5 wt. % or more and 1.5 wt. % or less.
4. The positive electrode material for a lithium ion secondary battery according to claim 3 , wherein the first compound has a particle diameter of 100 nm to 10 μm.
5. The positive electrode material for a lithium ion secondary battery according to claim 4 , wherein the second compound has a particle diameter of 10 nm to 1 μm.
6. The positive electrode material for a lithium ion secondary battery according to claim 1 , wherein the first compound has a particle diameter of 100 nm to 10 μm.
7. The positive electrode material for a lithium ion secondary battery according to claim 6 , wherein the second compound has a particle diameter of 10 nm to 1 μm.
8. The positive electrode material for a lithium ion secondary battery according to claim 1 , wherein the second compound has a particle diameter of 10 nm to 1 μm.
9. A lithium ion secondary battery comprising the positive electrode for a lithium ion secondary battery according to claim 8 .
10. The positive electrode material for a lithium ion secondary battery according to claim 1 , wherein the second compound has a smaller particle diameter than that of the first compound.
11. A positive electrode for a lithium ion secondary battery, comprising the positive electrode material for a lithium ion secondary battery according to claim 1 .