Saft America

Xilin Chen

Frank Cao

Thomas A Greszler

Kamen Nechev

Carine Margez Steinway

Jian Dong

Chia-Ming Chang

Shih-Chieh Liao

Saori Tokuoka

Dar-Jen Liu

Carine Margez

Owen Ou

Tyler Ruff

A multi-layer cathode coating for positive electrode of a rechargeable electrochemical cell (or secondary cell) (such as a lithium-ion secondary battery) and a secondary battery including a cathode having a multi-layer cathode coating. Multi-layer cathode coatings containing blends of one or more cathode active materials in certain weight ratios thereof.

Cathode having multi-layer cathode coating

The present disclosure relates to blended cathode materials for use as a positive electrode material of a rechargeable electrochemical cell (or secondary cell) (such as a lithium-ion secondary battery) and also relates to a secondary battery including a cathode having the blended cathode materials. In particular, disclosed are blends of lithium vanadium fluorophosphate (LVPF) or a derivative thereof with one or more conventional cathode active materials in certain weight ratios thereof.

Blended cathode materials for secondary batteries

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

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Timonium, MD, United States of America

Xilin Chen