公开(公告)号：US20200373566A1

公开(公告)日：2020-11-26

申请号：US16992187

申请日：2020-08-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shengan Xia ,  Hui Li ,  Fengchao Xie

IPC: H01M4/36 ,  H01M4/133 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/04 ,  H01M4/62

Abstract: A composite negative electrode material, a method for preparing the composite negative electrode material, a negative electrode plate of a lithium ion secondary battery containing the composite negative electrode material, and a lithium ion secondary battery containing a negative electrode active material of the lithium ion secondary battery, where the composite negative electrode material includes a carbon core and a carbon coating layer, where the carbon coating layer is a carbon layer that coats a surface of the carbon core, and both the carbon core and the carbon coating layer include a doping element, where the doping element is at least one of element N, P, B, S, O, F, Cl, or H.

公开(公告)号：US10454094B2

公开(公告)日：2019-10-22

申请号：US14580030

申请日：2014-12-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shengan Xia ,  Jun Yang ,  Pinghua Wang

IPC: H01M4/04 ,  H01M4/134 ,  H01M4/38 ,  H01M4/62 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/36 ,  H01M4/583 ,  H01M4/587

Abstract: Embodiments of the present invention provide a cathode active material for a lithium-ion secondary battery, where the cathode active material for a lithium-ion secondary battery includes a silicon-based active substance and a nitrogen-doped carbon material. The silicon-based active substance is encased in the interior of the nitrogen-doped carbon material, and the silicon-based active substance is one or more of a nanoparticle and a nanowire; a micropore is arranged on at least one of the exterior and the interior of the nitrogen-doped carbon material; and a material of the nitrogen-doped carbon material is a nitrogen-doped carbon network. The cathode active material for a lithium-ion secondary battery solves a problem in the prior art that a silicon material, when used as a cathode active material, easily falls from a current collector due to a great volume change and has a low conductivity.

公开(公告)号：US11569496B2

公开(公告)日：2023-01-31

申请号：US16010947

申请日：2018-06-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jiahua Liang ,  Shengan Xia ,  Fengchao Xie

IPC: H01M4/36 ,  H01M4/133 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/1393 ,  C01B32/05 ,  C01B32/21 ,  H01M4/02

Abstract: A lithium-ion rechargeable battery negative electrode active material and a preparation method thereof, a lithium-ion rechargeable battery negative electrode plate, and a lithium-ion rechargeable battery are provided. The negative electrode active material includes a carbon core and a coating layer formed on a surface of the carbon core, a material of the coating layer includes amorphous carbon and a doping element, and the doping element includes element nitrogen. The lithium-ion rechargeable battery negative electrode active material has the carbon core, and the coating layer that includes the doping element and the amorphous carbon is provided on the surface of the carbon core.

公开(公告)号：US10770720B2

公开(公告)日：2020-09-08

申请号：US15339081

申请日：2016-10-31

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shengan Xia ,  Hui Li ,  Fengchao Xie

IPC: H01M4/13 ,  H01M4/36 ,  H01M4/133 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/04 ,  H01M4/62 ,  H01M4/02

Abstract: A composite negative electrode material, a method for preparing the composite negative electrode material, a negative electrode plate of a lithium ion secondary battery containing the composite negative electrode material, and a lithium ion secondary battery containing a negative electrode active material of the lithium ion secondary battery, where the composite negative electrode material includes a carbon core and a carbon coating layer, where the carbon coating layer is a carbon layer that coats a surface of the carbon core, and both the carbon core and the carbon coating layer include a doping element, where the doping element is at least one of element N, P, B, S, O, F, Cl, or H.

公开(公告)号：US20190081350A1

公开(公告)日：2019-03-14

申请号：US16189432

申请日：2018-11-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhiyong Wang ,  Shengan Xia ,  Pinghua Wang

IPC: H01M10/0525 ,  H01M4/62

Abstract: A lithium-ion battery conductive bonding agent, including graphene and a first bonding agent grafted on a surface of the graphene, a production method for the conductive bonding agent, and an electrode plate and a lithium-ion battery that contain the conductive bonding agent, where the first bonding agent includes at least one of polyvinyl alcohol, sodium carboxymethyl cellulose, polyethylene glycol, polylactic acid, polymethyl methacrylate, polystyrene, polyvinylidene fluoride, a hexafluoropropylene polymer, styrene-butadiene rubber, sodium alginate, starch, cyclodextrin, or polysaccharide. The lithium-ion battery conductive bonding agent has good conductive performance and bonding performance and specific strength, improving mechanical strength of a whole electrode plate. The conductive bonding agent integrates a bonding agent and a conductive agent. This can improve content of active substance in the electrode plate, and further increase an energy density of an electrochemical cell.

公开(公告)号：US10153447B2

公开(公告)日：2018-12-11

申请号：US15387253

申请日：2016-12-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hui Li ,  Shengan Xia ,  Fengchao Xie

IPC: H01L51/42 ,  H01L31/18 ,  H01L31/032 ,  H01L51/00 ,  H01L31/0236 ,  C01B21/06 ,  H01L31/0256

Abstract: An organic solar cell device is provided, including a first electrode, a photoactive layer, a hole transport layer, and a second electrode that are stacked successively. The photoactive layer includes an electron receptor material and an electron donor material. The electron receptor material is graphene nitride that forms a foamy film on the first electrode and has a three-dimensional network structure. A part of the electron donor material permeates into the graphene nitride, and a part of the electron donor material is enriched on a side of the hole transport layer to form an electron donor enriched layer.

公开(公告)号：US20150104697A1

公开(公告)日：2015-04-16

申请号：US14580030

申请日：2014-12-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shengan Xia ,  Jun Yang ,  Pinghua Wang

IPC: H01M4/04 ,  H01M4/38 ,  H01M4/1395 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/583 ,  H01M4/36

CPC classification number: H01M4/0471 ,  H01M4/0416 ,  H01M4/0428 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/364 ,  H01M4/386 ,  H01M4/583 ,  H01M4/587 ,  H01M4/625

Abstract: Embodiments of the present invention provide a cathode active material for a lithium-ion secondary battery, where the cathode active material for a lithium-ion secondary battery includes a silicon-based active substance and a nitrogen-doped carbon material. The silicon-based active substance is encased in the interior of the nitrogen-doped carbon material, and the silicon-based active substance is one or more of a nanoparticle and a nanowire; a micropore is arranged on at least one of the exterior and the interior of the nitrogen-doped carbon material; and a material of the nitrogen-doped carbon material is a nitrogen-doped carbon network. The cathode active material for a lithium-ion secondary battery solves a problem in the prior art that a silicon material, when used as a cathode active material, easily falls from a current collector due to a great volume change and has a low conductivity.

Abstract translation: 本发明的实施方式提供一种锂离子二次电池用正极活性物质，其中锂离子二次电池用正极活性物质包含硅系活性物质和氮掺杂碳材料。 硅基活性物质被包裹在氮掺杂碳材料的内部，硅基活性物质是纳米颗粒和纳米线中的一种或多种; 在氮掺杂碳材料的外部和内部的至少一个上布置微孔; 并且氮掺杂碳材料的材料是氮掺杂碳网络。 用于锂离子二次电池的正极活性材料解决了现有技术中的问题，当硅材料用作阴极活性材料时，由于体积变化大而容易从集电体落下并具有低导电性。