公开(公告)号：US20240297304A1

公开(公告)日：2024-09-05

申请号：US18171799

申请日：2023-02-21

Applicant: SAFT AMERICA

Inventor： Xilin CHEN ,  Frank CAO ,  Lianxi YANG ,  Carlos NEGRETE ,  Thomas GRESZLER

IPC: H01M4/485 ,  H01M4/1315 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

CPC classification number: H01M4/485 ,  H01M4/1315 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M2004/028 ,  H01M2300/004

Abstract: Provided is a lithium-ion secondary batteries including lithium vanadium fluorophosphate (e.g., LiVPO4F and its derivatives) and/or a mix containing LVPF as a positive electrode active material and an electrolytic solution including tris(trimethylsilyl)phosphate (TTSP) to reduce cycle capacity loss.

公开(公告)号：US20230231129A1

公开(公告)日：2023-07-20

申请号：US18002596

申请日：2021-06-23

Applicant: SAFT

Inventor： Cécile TESSIER ,  Patrick BERNARD ,  Kamen NECHEV ,  Carine STEINWAY ,  Xilin CHEN ,  Cédric GOUSSET ,  Sylvie HERREYRE

IPC: H01M4/58 ,  H01M10/052 ,  H01M4/505 ,  H01M4/525 ,  H01M50/578 ,  H01M50/581

CPC classification number: H01M4/5825 ,  H01M10/052 ,  H01M4/505 ,  H01M4/525 ,  H01M50/578 ,  H01M50/581 ,  H01M2220/20 ,  H01M2004/021

Abstract: The use of a blend of a lithium nickel oxide and a lithium manganese iron phosphate as an active material composition in the cathode of a lithium secondary electrochemical cell for automotive applications, such as hybrid and electric vehicles. This blend allows decreasing the porosity of a lithium manganese iron phosphate-based cathode. It also allows improving the detectability of a gas release in the cell in case of an abnormal operation of the cell. It allows lowering the cell impedance at a low state of charge, typically less than 30%, and reducing the impedance increase of the cell during the cell lifespan.

公开(公告)号：US20220140316A1

公开(公告)日：2022-05-05

申请号：US17084374

申请日：2020-10-29

Applicant: SAFT AMERICA

Inventor： Xilin CHEN ,  Frank CAO

IPC: H01M4/36 ,  H01M4/58 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/48 ,  H01M10/42

Abstract: 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.

公开(公告)号：US20210083289A1

公开(公告)日：2021-03-18

申请号：US16569116

申请日：2019-09-12

Applicant: SAFT AMERICA

Inventor： Xilin CHEN ,  Saori TOKUOKA ,  Frank CAO ,  Jian DONG ,  Carine MARGEZ ,  Owen OU ,  Thomas GRESZLER

IPC: H01M4/58 ,  H01M10/0525 ,  H01M4/525 ,  H01M10/0563 ,  H01M10/0568

Abstract: 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: LiMnxFeyM1−x−yPO4, wherein 0.9 70:

公开(公告)号：US20220367842A1

公开(公告)日：2022-11-17

申请号：US17319654

申请日：2021-05-13

Applicant: SAFT AMERICA

Inventor： Xilin CHEN ,  Frank CAO ,  Tyler RUFF ,  Jian DONG ,  Carine MARGEZ STEINWAY ,  Thomas GRESZLER ,  Kamen NECHEV

IPC: H01M4/04 ,  H01M10/0525 ,  H01M4/58 ,  H01M10/44

Abstract: Pre-lithiation methods using lithium vanadium fluorophosphate (e.g., LiVPO4F 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.