Fast-charge lithium metal phosphate materials
AssigneeRivian IP Holdings, LLC
InventorsSoo Kim, Sun Ung Kim, Rubayyat Mahbub, Woochul Shin
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Abstract
Aspects of the disclosure relate to electrode active materials for use in battery cells that include a lithium metal phosphate core having a more ionically conductive layer thereon. The layer of the ionic conducting material advantageously can increase lithium ion conduction of the active material by at least one order of magnitude relative to the core material alone. As such, electrodes may be fabricated with lower areal densities resulting in battery cells that have such electrodes with higher charge rates and potentially smaller physical dimensions.
Claims20
A cathode active material, comprising:
- particles having a lithium metal phosphate (LMP) core material;
- a layer of an ionic conducting material on at least a portion of the LMP core material and a conductive carbon material between the LMP core material and the layer of the ionic conducting material;
- wherein the ionic conducting material has a higher ionic conductivity of lithium ions than the LMP core material.
An electrode, comprising:
- a current collector having a first principal surface and a second principal surface;
- a coating on the first principal surface and a coating on the second principal surface of the current collector;
- wherein the coating includes an active material comprising particles having a lithium metal phosphate (LMP) core material, a layer of an ionic conducting material on at least a portion of the LMP core material, and a conductive carbon material between the LMP core material and the layer of the ionic conducting material;
- wherein the ionic conducting material has a higher ionic conductivity of lithium ions than the LMP core material;
- and wherein an areal density of the coating on the first principal surface is no more than 15 mg/cm2 and an areal density of the coating on the second principal surface is no more than 15 mg/cm2.
A battery cell, comprising:
- an electrode including an active material comprising particles having a lithium metal phosphate (LMP) core material having a layer of an ionic conducting material on at least a portion of the LMP core material and a conductive carbon material between the LMP core material and the layer of the ionic conducting material;
- wherein the ionic conducting material has a higher ionic conductivity of lithium ions than the LMP core material.
Dependencies are inferred from the claim text.