公开(公告)号：US20200274168A1

公开(公告)日：2020-08-27

申请号：US16796287

申请日：2020-02-20

Applicant: SAFT ,  H.E.F.

Inventor： Celine LAVAUD ,  Cecile TESSIER ,  Laurent DUBOST ,  Michel Joseph Pierre Marie MARTIN

IPC: H01M4/66 ,  H01M10/0525 ,  H01M10/39 ,  H01M10/0562 ,  H01M10/0566 ,  H01M4/90

Abstract: A metal foil including on at least one of its sides a layer of a material including: a metal or a metal alloy, carbon, hydrogen, and optionally oxygen, the atomic percentage of the metal or of the metals of the alloy in the material ranging from 10 to 60%, the atomic percentage of carbon in the material ranging from 35 to 70%, the atomic percentage of hydrogen in the material ranging from 2 to 20%, and the atomic percentage of oxygen if present in the material being less than or equal to 10%. The metal foil can be used in the manufacture of a cathode of a lithium-ion electrochemical cell. The deposition of this layer reduces the internal resistance of the cell.

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.