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US 12,712,180 B2Granted
Positive electrode material and secondary battery
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsHiroshi Kawada, Kosuke Kuroda, Atsushi Fukui
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Abstract
A positive electrode material for secondary batteries, the material including a Li-rich transition metal oxide having a lithium-to-oxygen atomic ratio: Li/O of 0.8 or more, and a dicarboxylic acid and/or an anhydride of the dicarboxylic acid.
Claims19
A positive electrode material for secondary batteries, the positive electrode material comprising:
- a Li-rich transition metal oxide having a lithium-to-oxygen atomic ratio:
- Li/O of 0.8 or more;
- and
- a dicarboxylic acid and/or an anhydride of the dicarboxylic acid,
- wherein the anhydride of the dicarboxylic acid has 3 to 6 carbonyl carbon atoms,
- wherein the positive electrode material has a surface at least partially covered with a coating containing lithium, oxygen, and carbon, and
- wherein the positive electrode material further comprises a binder including polyvinylidene fluoride (PVdF).
4 more elements
A positive electrode material for secondary batteries, the positive electrode material comprising:
- a Li-rich transition metal oxide having a lithium-to-oxygen atomic ratio:
- Li/O of 0.8 or more;
- and
- a dicarboxylic acid and/or an anhydride of the dicarboxylic acid,
- wherein the positive electrode material is a positive electrode active material powder, a positive electrode material mixture, a slurry of a positive electrode material mixture, or a positive electrode material layer, which is free of an electrolyte,
- wherein the positive electrode material partially has an amorphous structure mainly composed of LiM4O2, a transition metal oxide mainly composed of one selected from the group consisting of LiFeO2, CoO and MnO, and/or a transition metal oxide mainly composed of a composite of at least two selected from the group consisting of LiFeO2, CoO, and MnO,
- M4 including at least one selected from the group consisting of Ni, Co, Mn, Cu and Fe,
- wherein the positive electrode material has a surface at least partially covered with a coating containing lithium, oxygen, and carbon, and
- wherein the positive electrode material further comprises a binder including polyvinylidene fluoride (PVdF).
6 more elements
A positive electrode material for secondary batteries, the positive electrode material comprising:
- a Li-rich transition metal oxide having a lithium-to-oxygen atomic ratio:
- Li/O of 0.8 or more;
- and
- a dicarboxylic acid and/or an anhydride of the dicarboxylic acid,
- wherein the positive electrode material is a positive electrode active material powder, a positive electrode material mixture, a slurry of a positive electrode material mixture, or a positive electrode material layer, which is free of an electrolyte,
- wherein the positive electrode material has a surface at least partially covered with a coating containing lithium, oxygen, and carbon, and
- wherein the positive electrode material further comprises a binder including polyvinylidene fluoride (PVdF).
4 more elements
Dependencies are inferred from the claim text.