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：US20200259215A1

公开(公告)日：2020-08-13

申请号：US16270160

申请日：2019-02-07

Applicant: SAFT AMERICA

Inventor： Joong Sun PARK ,  Saori TOKUOKA ,  Carine MARGEZ ,  Thomas GRESZLER

IPC: H01M10/0569 ,  H01M4/58 ,  H01M4/587 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/0567

Abstract: Provided are an electrolyte for low temperature operation of lithium titanate electrodes, graphite electrodes, and lithium-ion batteries as well as electrodes and batteries employing the same. The electrolyte contains 1 to 30 vol % of a low molecular weight ester having a molecular weight of less than 105 g/mol and at least one non-fluorinated carbonate. An electrolyte additive may include 0.1 to 10 wt % of fluorinated ethylene carbonate, particularly when used with a graphite anode. Another electrolyte contains a high content of the low molecular weight ester of at least 70 vol %.

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：US20210135173A1

公开(公告)日：2021-05-06

申请号：US16668927

申请日：2019-10-30

Applicant: SAFT AMERICA

Inventor： Saori TOKUOKA ,  Thomas GRESZLER ,  James G. SNYDER

IPC: H01M2/10 ,  H01M4/36 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/48

Abstract: Provided are battery modules having two different types electrochemistry connected in series, which includes a plurality of a first cell, wherein the first cell includes an anode active material of graphite, Si, SiOx, or a blend thereof as a main component (“a GSi cell”), and at least one of a second cell, wherein the second cell includes an anode active material of a lithium titanate oxide or titanate oxide able to be lithiated as a main component (“a LTO cell”). Also provided are battery systems that include a plurality of the battery modules.

公开(公告)号：US20150333371A1

公开(公告)日：2015-11-19

申请号：US14710753

申请日：2015-05-13

Applicant: SAFT GROUPE SA

Inventor： Yee Yvonne CHEN ,  Thomas GRESZLER ,  Bridget DEVENEY

IPC: H01M10/0567 ,  H01M10/058 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/131

CPC classification number: H01M4/485 ,  H01M4/0447 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/058 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/0025 ,  Y10T29/4911

Abstract: A lithium-ion battery including a negative electrode (anode) containing lithium titanate oxide (Li4Ti5O12) (LTO) as an active material and a stable interface layer disposed on a surface of the electrode; a positive electrode (cathode); an electrolyte containing a solvent and an impedance growth reducing additive; and a separator disposed between the electrodes. The LTO-based cell with the stable interface layer on the negative electrode is formed by holding the potential of the negative electrode below the reduction potential of the impedance growth reducing additive for a sufficient length of time during a first formation cycle. The stable interface layer on the negative electrode mitigates impedance growth on the positive electrode over cycle life. When the impedance growth reducing additive is fluoroethylene carbonate (C3H3FO3), the stable interface layer includes a LiF deposit.

Abstract translation: 一种锂离子电池，包括含有钛酸锂（Li4Ti5O12）（LTO）作为活性物质的负极（阳极）和设置在电极表面上的稳定的界面层; 正极（阴极）; 含有溶剂和阻抗增长减少添加剂的电解质; 以及设置在电极之间的隔膜。 通过在第一次形成循环期间将负极的电位保持在阻抗增长还原添加剂的还原电位足够长的时间内，形成具有稳定的界面层的基于LTO的电池。 负极上的稳定界面层减缓了循环寿命期间正极上的阻抗增长。 当阻抗增长减少添加剂是氟代亚乙基碳酸酯（C 3 H 3 FO 3）时，稳定界面层包括LiF沉积物。

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.

公开(公告)号：US20210384527A1

公开(公告)日：2021-12-09

申请号：US16895399

申请日：2020-06-08

Applicant: SAFT AMERICA

Inventor： Thomas GRESZLER ,  Saori TOKUOKA

IPC: H01M6/18 ,  H01M2/02 ,  H01M2/26 ,  H01M4/583 ,  H01M6/16 ,  H01M4/66 ,  H01M6/02

Abstract: Provided is pouch battery including an electrode assembly, and a case in which the electrode assembly is sealed and housed; the electrode assembly including a stacked structure of a sheet cathode, a sheet separator, and a sheet anode; the sheet cathode including a positive electrode active material disposed on a current collector; the sheet anode is thin conductive sheet on which lithium metal reversibly deposits on a surface thereof during discharging; the sheet anode being made of a conductive material other than lithium and having a surface substantially free from lithium metal prior to charging the battery. The pouch battery design is flexible and lightweight and provides high power density, making it a suitable replacement for conventional lithium-ion primary batteries and thermal batteries in many applications. Power can be further increased by the application of external compression. Additives and formation conditions can be tailored for forming a solid-electrolyte interface (SEI).

公开(公告)号：US20190006667A1

公开(公告)日：2019-01-03

申请号：US16062977

申请日：2015-12-18

Applicant: SAFT

Inventor： Kamen NECHEV ,  Yannick BORTHOMIEU ,  Chengsong MA ,  Thomas GRESZLER ,  Cecile TESSIER

IPC: H01M4/485 ,  H01M10/0525

Abstract: A Low Earth Orbit (LEO) satellite has 95 to 105 minutes orbit time with only 60-65 minutes available for recharging. Due to the low charge capability of a Li-ion graphite cell, depth of discharge is limited for this application. The cell of the invention using a lithiated titanate oxide or a titanate oxide able to be lithiated in the negative electrode allows increase of depth of discharge. Increasing charge rate without amplifying capacity loss per cycle allows improvement of useful specific energy per cycle. Depth of discharge values up to 70-80% can be envisioned. Even if the cell exhibits low specific energy, the LEO application is a specific case where useful energy per cycle can be optimized to 70 to 80 Wh/kg.