Saft America

Jian Dong

Thomas A Greszler

Frank Cao

Xilin Chen

Saori Tokuoka

Carine Margez

Carine Margez Steinway

Kamen Nechev

Tyler Ruff

Owen Ou

Pre-lithiation methods using lithium vanadium fluorophosphate (e.g., LiVPOF and its derivatives) ('LVPF') as a cathode active material in a lithium-ion secondary battery. The pre-lithiation methods include compensating for an expected loss of active lithium by selecting LVPF having a specific pre-lithiated chemistry (or a blend of LVPF selected to have a specific pre-lithiated chemistry) and selecting a total amount of the pre-lithiated LVPF. The pre-lithiation methods may include initially charging the lithium-ion secondary battery at the lower of the two charge/discharge plateaus of LVPF to release active lithium.

Pre-lithiation method and pre-lithiated lithium-ion secondary battery

Provided is a positive electrode active material for a lithium-ion battery, the positive electrode active material including a blend of a doped lithium manganese iron phosphate (dLMFP) according to the formula: LiMnFeMPO, wherein 0.9&#x3c;x+y&#x3c;1; and M is one or more selected from the group consisting of Mg, Ca and Ba with one or both of a lithium nickel cobalt manganese oxide (NMC) compound having a Ni content greater than 0.6 relative to a total amount of metals other than Li and a lithium nickel cobalt aluminum oxide (NCA) compound. In particular, provided is a blend at a weight ratio of dLMFP to NMC and/or NCA (i.e., dLMFP:(NMC+NCA)) of &#x3e;70:&#x3c;30, such as 75:25, 80:20, 85:15, 90:10, etc.

Cathode materials for lithium ion batteries

Growing community of inventors

Timonium, MD, United States of America

Jian Dong