Olivine-based cathode materials with improved conductivity
AssigneeRivian IP Holdings, LLC
InventorsSoo Kim, Majid Talebiesfandarani, Sookyung Jeong, Rubayyat Mahbub, Muratahan Aykol, Tae Kyoung Kim, Ki Tae Park
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Abstract
An electrode active material includes a dopant (M2) and a lithium manganese iron phosphate host material represented as LiM2xMnyFe1-x-yPO4, wherein the dopant is a transition metal or main group metal, and the electrode active material exhibits an increased ionic conductivity compared to a lithium manganese iron phosphate (LiMnyFe1-yPO4) without the dopant, wherein x is 0.01 to 0.15, and y is 0.30 to 0.85.
Claims18
An electrode active material comprising a dopant (M2) and a lithium manganese iron phosphate host material represented as LiM2xMnyFe1-x-yPO4, wherein the electrode active material exhibits an increased ionic conductivity compared to a lithium manganese iron phosphate (LiMnyFe1-yPO4) without the dopant, wherein x is 0.01 to 0.15, and y is 0.30 to 0.85, wherein M2 is In3+.
A cathode active material comprising:
- a host phase of formula LiM2xMnyFe1-x-yPO4;
- and
- a secondary phase of formula LiaM2bPcOd;
- wherein:
- x is 0.01 to 0.15;
- y is 0.30 to 0.85;
- a is 0 to 11;
- b is 1 to 4;
- c is 0 to 12;
- d is 4 to 29;
- M2 is In3+;
- M2 is present in the host phase at less than about 15 wt %;
- and
- the cathode active material exhibits an increased ionic conductivity compared to LiMnyFe1yPO4 without the M2 and the secondary phase.
An electrode active material comprising a dopant (M2) and a lithium manganese iron phosphate host material represented as LiM2xMnyFe1-x-yPO4, wherein the electrode active material exhibits an increased ionic conductivity compared to a lithium manganese iron phosphate (LiMnyFe1-yPO4) without the dopant, wherein x is 0.01 to 0.15, and y is 0.30 to 0.85, wherein M2 is Ga3+, In3+, or a mixture thereof;
- further comprising a secondary phase of formula LiaM2′bPcOd, wherein
- a is 0 to 11;
- b is 1 to 4;
- c is 0 to 12;
- d is 4 to 29;
- and
- M2′ is Ga3+, In3+, or a mixture thereof.
Dependencies are inferred from the claim text.