公开(公告)号：US20220384811A1

公开(公告)日：2022-12-01

申请号：US17767223

申请日：2020-10-07

Applicant: IMERTECH SAS

Inventor： Michael SPAHR ,  Hiroyuki TAKI ,  Hiroyuki MORIOKA ,  Xu WANG ,  Tsutomu YAHIRO

IPC: H01M4/587 ,  H01M10/0525

Abstract: The present disclosure relates to compositions comprising at least one carbonaceous particulate material comprised of synthetic graphite particles having a BET specific surface area (SSA) of equal to or less than 4 m2/g, and further comprising between about 5 and about 75% (w/w) of at least one carbonaceous particulate material comprised of natural graphite particles coated with non-graphitic carbon and having a BET SSA of equal to or less than 8 m2/g. Such compositions are particularly useful as active material for negative electrodes in, e.g., lithium-ion batteries and the like in view of their overall favorable electrochemical properties, particularly for automotive and energy storage applications. The present disclosure also relates to the use of said non-graphitic carbon-coated natural graphite particles for preparing compositions that are suitable for being used as an active material in a negative electrode of, e.g., a lithium ion battery. The non-graphitic carbon-coated natural graphite particles described herein are also useful as a carbonaceous additive to increase, e.g., the energy density and charge rate performance of a lithium-ion battery while maintaining the power density of the cell compared to a cell with an anode absent the carbonaceous additive.

公开(公告)号：US20210147237A1

公开(公告)日：2021-05-20

申请号：US17256076

申请日：2019-06-27

Applicant: IMERTECH

Inventor： Dario CERICOLA ,  Michael SPAHR

IPC: C01B32/05 ,  C09C1/56 ,  H01M4/133

Abstract: The present disclosure relates to surface-functionalized carbonaceous particles, optionally in agglomerated form, methods for making such surface-functionalized carbonaceous particles and their use, for example as conductive additives in battery electrodes. The surface-functionalized carbonaceous particles are for example obtainable by milling a non-graphitic carbon material, followed by subsequent functionalization through controlled oxidation. The surface-functionalized carbonaceous particles can be used as additive in battery electrodes. The disclosure also pertains to dispersions of such carbonaceous materials in a liquid medium and their use as, among others, conductive coatings. Polymer compounds filled with the surface-functionalized carbonaceous particles are also disclosed.

公开(公告)号：US20200227747A1

公开(公告)日：2020-07-16

申请号：US16821144

申请日：2020-03-17

Applicant: ImerTech SAS

Inventor： Michael SPAHR ,  Pirmin ULMANN ,  Simone ZÜRCHER ,  Sergio PACHECO BENITO ,  Hiroyuki TAKI

IPC: H01M4/587 ,  H01M10/0525 ,  H01M10/054 ,  H01M10/44 ,  H01M4/36 ,  C01B32/00 ,  H01M2/00 ,  C01B32/205 ,  C01B32/05

Abstract: The present disclosure relates to a novel process for preparing isotropic carbonaceous composite particles with favorable crystallographic, morphological & mechanical properties, wherein relatively fine carbonaceous primary particles are coated with a carbonaceous binder precursor material, agglomerated and finally heat-treated at temperatures between about 1850 and 3500° C. to convert the binder precursor material to non-graphitic or graphitic carbon, thereby resulting in stable highly isotropic carbonaceous composite materials wherein the primary particles of the aggregate are held together by the carbonized/graphitized binder. The present disclosure also relates to the isotropic carbonaceous composite particles obtainable by the process described herein. The disclosure further relates to uses of said isotropic carbonaceous composite material in various applications, including as active material in negative electrodes in lithium-ion batteries, and in secondary products containing said isotropic carbonaceous composite material.

公开(公告)号：US20220090644A1

公开(公告)日：2022-03-24

申请号：US17420057

申请日：2019-12-23

Applicant: IMERTECH SAS

Inventor： Raffaele GILARDI ,  Michal GULAS ,  Michael SPAHR

IPC: F16D69/02 ,  C01B32/21 ,  C09C1/46 ,  C09C3/06

Abstract: The present invention relates to friction materials comprising graphite having a c/2 of 0.3358 nm or less and a spring-back of 40% or more, such as 41% or more. The invention further relates to methods of making and uses of such friction materials.