Rivian IP Holdings, LLC

Sun Ung Kim

Soo Kim

Ki Tae Park

Tae Kyoung Kim

Rubayyat Mahbub

Woochul Shin

Sookyung Jeong

A cathode active material includes a lithium manganese (Mn) iron (Fe) phosphate, wherein a mol ratio of Mn:Fe is from about 3:7 to about 9:1, the lithium manganese iron phosphate is an olivine structure, and the Mn and Fe in the olivine are present in an partially ordered or partially disordered sublattice.

High energy density olivine-based cathode materials

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.

Fast-charge lithium metal phosphate materials

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Pleasanton, CA, United States of America

Sun Ung Kim