公开(公告)号：US09437344B2

公开(公告)日：2016-09-06

申请号：US12804413

申请日：2010-07-22

申请人： Aruna Zhamu ,  Jinjun Shi ,  Guorong Chen ,  Qing Fang ,  Bor Z. Jang ,  Ming C. Wang

发明人： Aruna Zhamu ,  Jinjun Shi ,  Guorong Chen ,  Qing Fang ,  Bor Z. Jang ,  Ming C. Wang

IPC分类号： B32B9/00 ,  H01B1/12 ,  C01B31/04 ,  H01M4/133 ,  H01M4/587 ,  H01M10/0525

CPC分类号： H01B1/122 ,  C01B32/20 ,  H01M4/133 ,  H01M4/587 ,  H01M10/0525 ,  Y02T10/7011 ,  Y10T428/30

摘要： This invention provides a graphite or graphite-carbon particulate for use as a lithium secondary battery anode material having a high-rate capability. The particulate is formed of a core carbon or graphite particle and a plurality of satellite carbon or graphite particles that are each separately bonded to the core particle wherein the core particle is spherical in shape, slightly elongate in shape with a major axis-to-minor axis ratio less than 2, or fibril in shape, and wherein the satellite particles are disc-, platelet-, or flake-like particles each containing a graphite crystallite with a crystallographic c-axis dimension Lc and a lateral dimension. Preferably, Lc is less than 100 nm and the flake/platelet lateral dimension is less than 1 μm. The core particle may be selected from natural graphite, artificial graphite, spherical graphite, graphitic coke, meso-carbon micro-bead, soft carbon, hard carbon, graphitic fibril, carbon nano-fiber, carbon fiber, or graphite fiber. Preferably, the flat-shaped particles are randomly oriented with respect to one another.

摘要翻译： 本发明提供一种用作具有高速率能力的锂二次电池负极材料的石墨或石墨 - 碳颗粒。 颗粒由芯碳或石墨颗粒和多个卫星碳或石墨颗粒形成，每个卫星碳或石墨颗粒分别与核心颗粒结合，其中核心颗粒是球形的，具有略长的形状，具有长轴对次要的 轴比小于2，或原纤维形状，并且其中卫星颗粒是盘状，片状或片状颗粒，每个颗粒含有具有晶体c轴尺寸Lc和横向尺寸的石墨微晶。 优选地，Lc小于100nm，片/横板尺寸小于1μm。 核心颗粒可以选自天然石墨，人造石墨，球形石墨，石墨焦炭，内消旋碳微珠，软碳，硬碳，石墨原纤，碳纳米纤维，碳纤维或石墨纤维。 优选地，扁平形颗粒相对于彼此是随机取向的。

公开(公告)号：US09190667B2

公开(公告)日：2015-11-17

申请号：US12220651

申请日：2008-07-28

申请人： Aruna Zhamu ,  Bor Z. Jang ,  Jinjun Shi

发明人： Aruna Zhamu ,  Bor Z. Jang ,  Jinjun Shi

IPC分类号： H01M4/13 ,  H01M4/587 ,  H01G9/04 ,  H01G11/36 ,  H01G11/38 ,  H01G11/42 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

CPC分类号： H01M4/587 ,  H01G9/058 ,  H01G11/36 ,  H01G11/38 ,  H01G11/42 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/362 ,  H01M4/621 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/022 ,  Y02E60/122 ,  Y02E60/13

摘要： A composite composition for electrochemical cell electrode applications, the composition comprising multiple solid particles, wherein (a) a solid particle is composed of graphene platelets dispersed in or bonded by a first matrix or binder material, wherein the graphene platelets are not obtained from graphitization of the first binder or matrix material; (b) the graphene platelets have a length or width in the range of 10 nm to 10 μm; (c) the multiple solid particles are bonded by a second binder material; and (d) the first or second binder material is selected from a polymer, polymeric carbon, amorphous carbon, metal, glass, ceramic, oxide, organic material, or a combination thereof. For a lithium ion battery anode application, the first binder or matrix material is preferably amorphous carbon or polymeric carbon. Such a composite composition provides a high anode capacity and good cycling response. For a supercapacitor electrode application, the solid particles preferably have meso-scale pores therein to accommodate electrolyte.

摘要翻译： 一种用于电化学电池电极应用的复合组合物，所述组合物包含多个固体颗粒，其中（a）固体颗粒由分散在第一基质或粘合剂材料中或由第一基质或粘合剂材料粘合的石墨烯片晶组成，其中石墨烯片晶不是从石墨烯 第一粘合剂或基质材料; （b）石墨烯片晶的长度或宽度在10nm至10μm的范围内; （c）多个固体颗粒通过第二粘合剂材料粘合; 和（d）第一或第二粘合剂材料选自聚合物，聚合物碳，无定形碳，金属，玻璃，陶瓷，氧化物，有机材料或其组合。 对于锂离子电池阳极应用，第一粘合剂或基质材料优选为无定形碳或聚合碳。 这种复合组合物提供高阳极容量和良好的循环响应。 对于超级电容器电极应用，固体颗粒优选在其中具有中等尺度的孔以适应电解质。

公开(公告)号：US08691129B2

公开(公告)日：2014-04-08

申请号：US11800730

申请日：2007-05-08

申请人： Aruna Zhamu ,  Jinjun Shi ,  Jiusheng Guo ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Jinjun Shi ,  Jiusheng Guo ,  Bor Z. Jang

IPC分类号： B29C43/00

CPC分类号： B22F1/0059 ,  B22F2998/10 ,  B22F3/02

摘要： A method of producing an electrically conductive composite composition, which is particularly useful for fuel cell bipolar plate applications. The method comprises: (a) providing a supply of expandable graphite powder; (b) providing a supply of a non-expandable powder component comprising a binder or matrix material; (c) blending the expandable graphite with the non-expandable powder component to form a powder mixture wherein the non-expandable powder component is in the amount of between 3% and 60% by weight based on the total weight of the powder mixture; (d) exposing the powder mixture to a temperature sufficient for exfoliating the expandable graphite to obtain a compressible mixture comprising expanded graphite worms and the non-expandable component; (e) compressing the compressible mixture at a pressure within the range of from about 5 psi to about 50,000 psi in predetermined directions into predetermined forms of cohered graphite composite compact; and (f) treating the so-formed cohered graphite composite to activate the binder or matrix material thereby promoting adhesion within the compact to produce the desired composite composition. Preferably, the non-expandable powder component further comprises an isotropy-promoting agent such as non-expandable graphite particles. Further preferably, step (e) comprises compressing the mixture in at least two directions. The method leads to composite plates with exceptionally high thickness-direction electrical conductivity.

摘要翻译： 一种制造导电复合材料组合物的方法，其特别适用于燃料电池双极板应用。 该方法包括：（a）提供可膨胀石墨粉的供应; （b）提供包含粘合剂或基质材料的不可膨胀粉末组分的供应; （c）将可膨胀石墨与不可发泡粉末组分混合以形成粉末混合物，其中基于粉末混合物的总重量，不可发泡粉末组分的量为3重量％至60重量％; （d）将粉末混合物暴露于足以剥离可膨胀石墨的温度以获得包含膨胀石墨蠕虫和不可膨胀组分的可压缩混合物; （e）在预定方向上以约5psi至约50,000psi范围内的压力将可压缩混合物压缩成预定形式的粘结石墨复合材料; 和（f）处理如此形成的粘结石墨复合材料以活化粘合剂或基质材料，从而促进压块内的粘合以产生所需的复合组合物。 优选地，不可膨胀粉末组分还包含各向同性促进剂，例如不可膨胀石墨颗粒。 进一步优选地，步骤（e）包括在至少两个方向压缩混合物。 该方法导致具有非常高的厚度方向电导率的复合板。

公开(公告)号：US20120064409A1

公开(公告)日：2012-03-15

申请号：US12807635

申请日：2010-09-10

申请人： Aruna Zhamu ,  Jinjun Shi ,  Guorong Chen ,  Qing Fang ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Jinjun Shi ,  Guorong Chen ,  Qing Fang ,  Bor Z. Jang

IPC分类号： H01M4/583 ,  H01B1/04 ,  H01M4/505 ,  H01M4/525 ,  H01M4/485 ,  H01M4/50

CPC分类号： H01M4/133 ,  B82Y30/00 ,  H01B1/04 ,  H01M4/0471 ,  H01M4/13 ,  H01M4/131 ,  H01M4/139 ,  H01M4/386 ,  H01M4/387 ,  H01M4/48 ,  H01M4/483 ,  H01M4/523 ,  H01M4/5825 ,  H01M4/587 ,  H01M4/625 ,  H01M10/0525 ,  Y02E60/122

摘要： A nano graphene-enhanced particulate for use as a lithium-ion battery anode active material, wherein the particulate is formed of a single sheet of graphene or a plurality of graphene sheets and a plurality of fine anode active material particles with a size smaller than 10 μm. The graphene sheets and the particles are mutually bonded or agglomerated into the particulate with at least a graphene sheet embracing the anode active material particles. The amount of graphene is at least 0.01% by weight and the amount of the anode active material is at least 0.1% by weight, all based on the total weight of the particulate. A lithium-ion battery having an anode containing these graphene-enhanced particulates exhibits a stable charge and discharge cycling response, a high specific capacity per unit mass, a high first-cycle efficiency, a high capacity per electrode volume, and a long cycle life.

摘要翻译： 一种用作锂离子电池负极活性材料的纳米石墨烯增强颗粒，其中颗粒由单片石墨烯或多个石墨烯片和多个尺寸小于10的细阳极活性材料颗粒形成 μm。 石墨烯片和颗粒与至少包含阳极活性物质颗粒的石墨烯片相互结合或聚集成颗粒。 石墨烯的量为至少0.01重量％，阳极活性物质的量为至少0.1重量％，均基于颗粒的总重量。 具有包含这些石墨烯增强颗粒的阳极的锂离子电池表现出稳定的充放电循环响应，每单位质量的高比容量，高的第一循环效率，每电极体积的高容量和长的循环寿命 。

公开(公告)号：US20120021294A1

公开(公告)日：2012-01-26

申请号：US12804413

申请日：2010-07-22

申请人： Aruna Zhamu ,  Jinjun Shi ,  Guorong Chen ,  Qing Fang ,  Bor Z. Jang ,  Ming C. Wang

发明人： Aruna Zhamu ,  Jinjun Shi ,  Guorong Chen ,  Qing Fang ,  Bor Z. Jang ,  Ming C. Wang

IPC分类号： H01M4/58 ,  H01B1/04 ,  C01B31/04

CPC分类号： H01B1/122 ,  C01B32/20 ,  H01M4/133 ,  H01M4/587 ,  H01M10/0525 ,  Y02T10/7011 ,  Y10T428/30

摘要： This invention provides a graphite or graphite-carbon particulate for use as a lithium secondary battery anode material having a high-rate capability. The particulate is formed of a core carbon or graphite particle and a plurality of satellite carbon or graphite particles that are each separately bonded to the core particle wherein the core particle is spherical in shape, slightly elongate in shape with a major axis-to-minor axis ratio less than 2, or fibril in shape, and wherein the satellite particles are disc-, platelet-, or flake-like particles each containing a graphite crystallite with a crystallographic c-axis dimension Lc and a lateral dimension. Preferably, Lc is less than 100 nm and the flake/platelet lateral dimension is less than 1 μm. The core particle may be selected from natural graphite, artificial graphite, spherical graphite, graphitic coke, meso-carbon micro-bead, soft carbon, hard carbon, graphitic fibril, carbon nano-fiber, carbon fiber, or graphite fiber. Preferably, the flat-shaped particles are randomly oriented with respect to one another.

摘要翻译： 本发明提供一种用作具有高速率能力的锂二次电池负极材料的石墨或石墨 - 碳颗粒。 颗粒由芯碳或石墨颗粒和多个卫星碳或石墨颗粒形成，每个卫星碳或石墨颗粒分别与核心颗粒结合，其中核心颗粒是球形的，具有略长的形状，具有长轴对次要的 轴比小于2，或原纤维形状，并且其中卫星颗粒是盘状，片状或片状颗粒，每个颗粒含有具有晶体c轴尺寸Lc和横向尺寸的石墨微晶。 优选地，Lc小于100nm，片/横板尺寸小于1μm。 核心颗粒可以选自天然石墨，人造石墨，球形石墨，石墨焦炭，内消旋碳微珠，软碳，硬碳，石墨原纤，碳纳米纤维，碳纤维或石墨纤维。 优选地，扁平形颗粒相对于彼此是随机取向的。

公开(公告)号：US07824651B2

公开(公告)日：2010-11-02

申请号：US11800728

申请日：2007-05-08

申请人： Aruna Zhamu ,  Jinjun Shi ,  Jiusheng Guo ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Jinjun Shi ,  Jiusheng Guo ,  Bor Z. Jang

IPC分类号： C01B31/04

CPC分类号： C01B32/225

摘要： The present invention provides a method of exfoliating a layered material (e.g., graphite and graphite oxide) to produce nano-scaled platelets having a thickness smaller than 100 nm, typically smaller than 10 nm. The method comprises (a) dispersing particles of graphite, graphite oxide, or a non-graphite laminar compound in a liquid medium containing therein a surfactant or dispersing agent to obtain a stable suspension or slurry; and (b) exposing the suspension or slurry to ultrasonic waves at an energy level for a sufficient length of time to produce separated nano-scaled platelets. The nano-scaled platelets are candidate reinforcement fillers for polymer nanocomposites. Nano-scaled graphene platelets are much lower-cost alternatives to carbon nano-tubes or carbon nano-fibers.

摘要翻译： 本发明提供一种剥离层状材料（例如石墨和氧化石墨）以产生厚度小于100nm，通常小于10nm的纳米级片晶的方法。 该方法包括（a）将石墨，氧化石墨或非石墨层状化合物的颗粒分散在其中含有表面活性剂或分散剂的液体介质中以获得稳定的悬浮液或浆料; 和（b）将悬浮液或浆料以能量水平暴露于超声波足够长的时间以产生分离的纳米级血小板。 纳米级血小板是聚合物纳米复合材料的候选增强填料。 纳米级石墨烯血小板是碳纳米管或碳​​纳米纤维成本低廉的替代品。

公开(公告)号：US20090269511A1

公开(公告)日：2009-10-29

申请号：US12150096

申请日：2008-04-25

申请人： Aruna Zhamu ,  Bor Z. Jang ,  Jinjun Shi

发明人： Aruna Zhamu ,  Bor Z. Jang ,  Jinjun Shi

IPC分类号： C23C16/44 ,  C23C14/34 ,  B05D1/00 ,  C25D5/00 ,  C25D13/00 ,  B05D3/06 ,  B29C65/52

CPC分类号： H01M4/75 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/15 ,  C01B33/029 ,  C01B33/03 ,  C23C18/08 ,  C23C18/1204 ,  C23C18/1216 ,  C23C18/122 ,  C23C18/14 ,  C25D1/04 ,  C25D9/06 ,  H01M4/13 ,  H01M4/134

摘要： This invention provides a process for producing a hybrid nano-filament composition for use in a lithium battery electrode. The process comprises: (a) providing a porous aggregate of electrically conductive nano-wires that are substantially interconnected, intersected, physically contacted, or chemically bonded to form a porous network of electrically conductive filaments, wherein the nano-wires have a diameter or thickness less than 500 nm; and (b) depositing an electro-active coating onto a surface of the nano-wires, wherein the electro-active coating is capable of absorbing and desorbing lithium ions and the coating has a thickness less than 10 μm, preferably less than 1 μm. This process is applicable to the production of both an anode and a cathode. The battery featuring an anode or cathode made with this process exhibits an exceptionally high specific capacity, an excellent reversible capacity, and a long cycle life.

摘要翻译： 本发明提供一种用于生产用于锂电池电极的混合纳米线组合物的方法。 该方法包括：（a）提供导电纳米线的多孔聚集体，其基本上互连，相交，物理接触或化学键合以形成导电细丝的多孔网络，其中所述纳米线具有直径或厚度 小于500nm; 和（b）在纳米线的表面上沉积电活性涂层，其中所述电活性涂层能够吸收和解吸锂离子，并且所述涂层的厚度小于10um，优选小于1um。 该方法适用于阳极和阴极的生产。 具有由该方法制成的阳极或阴极的电池具有特别高的比容量，极好的可逆容量和较长的循环寿命。

公开(公告)号：US20090022649A1

公开(公告)日：2009-01-22

申请号：US11879680

申请日：2007-07-19

申请人： Aruna Zhamu ,  Jinjun Shi ,  Joan Jang ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Jinjun Shi ,  Joan Jang ,  Bor Z. Jang

IPC分类号： C01B31/04

CPC分类号： B82Y40/00 ,  B82Y30/00 ,  C01B32/15 ,  C01B32/19 ,  C01B32/22 ,  C01B2204/04

摘要： A method of producing ultra-thin, separated nano-scaled platelets having an average thickness no greater than 2 nm or comprising, on average, no more than 5 layers per platelet from a layered graphite material. The method comprises: (a) providing a supply of nano-scaled platelets with an average thickness of no more than 10 nm or having, on average, no more than 30 layers per platelet; and (b) intercalating the supply of nano-scaled platelets to produce intercalated nano platelets and exfoliating the intercalated nano platelets at a temperature and a pressure for a sufficient period of time to produce the ultra-thin nano-scaled platelets. The nano-scaled platelets are candidate reinforcement fillers for polymer nanocomposites. Nano-scaled graphene platelets are much lower-cost alternatives to carbon nano-tubes or carbon nano-fibers.

摘要翻译： 制造平均厚度不大于2nm的超薄分离纳米级血小板的方法，或者由层状石墨材料平均每片血小板平均不超过5层。 该方法包括：（a）提供平均厚度不超过10nm的纳米级血小板供应，或每片血小板平均不超过30层; 和（b）插入纳米级血小板的供应以产生插层的纳米血小板，并在温度和压力下将嵌入的纳米血小板剥离足够长的时间以产生超薄纳米级血小板。 纳米级血小板是聚合物纳米复合材料的候选增强填料。 纳米级石墨烯血小板是碳纳米管或碳​​纳米纤维成本低廉的替代品。

公开(公告)号：US09558860B2

公开(公告)日：2017-01-31

申请号：US12807635

申请日：2010-09-10

申请人： Aruna Zhamu ,  Jinjun Shi ,  Guorong Chen ,  Qing Fang ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Jinjun Shi ,  Guorong Chen ,  Qing Fang ,  Bor Z. Jang

IPC分类号： H01M4/583 ,  H01B1/04 ,  H01M4/505 ,  H01M4/525 ,  H01M4/485 ,  H01M4/50 ,  B82Y30/00 ,  H01M4/04 ,  H01M4/13 ,  H01M4/139 ,  H01M4/62 ,  H01M4/38 ,  H01M4/48 ,  H01M4/58

CPC分类号： H01M4/133 ,  B82Y30/00 ,  H01B1/04 ,  H01M4/0471 ,  H01M4/13 ,  H01M4/131 ,  H01M4/139 ,  H01M4/386 ,  H01M4/387 ,  H01M4/48 ,  H01M4/483 ,  H01M4/523 ,  H01M4/5825 ,  H01M4/587 ,  H01M4/625 ,  H01M10/0525 ,  Y02E60/122

摘要： A nano graphene-enhanced particulate for use as a lithium-ion battery anode active material, wherein the particulate is formed of a single sheet of graphene or a plurality of graphene sheets and a plurality of fine anode active material particles with a size smaller than 10 μm. The graphene sheets and the particles are mutually bonded or agglomerated into the particulate with at least a graphene sheet embracing the anode active material particles. The amount of graphene is at least 0.01% by weight and the amount of the anode active material is at least 0.1% by weight, all based on the total weight of the particulate. A lithium-ion battery having an anode containing these graphene-enhanced particulates exhibits a stable charge and discharge cycling response, a high specific capacity per unit mass, a high first-cycle efficiency, a high capacity per electrode volume, and a long cycle life.

摘要翻译： 一种用作锂离子电池负极活性材料的纳米石墨烯增强颗粒，其中颗粒由单片石墨烯或多个石墨烯片和多个尺寸小于10的细阳极活性材料颗粒形成 μm。 石墨烯片和颗粒与至少包含阳极活性物质颗粒的石墨烯片相互结合或聚集成颗粒。 石墨烯的量为至少0.01重量％，阳极活性物质的量为至少0.1重量％，均基于颗粒的总重量。 具有包含这些石墨烯增强颗粒的阳极的锂离子电池表现出稳定的充放电循环响应，每单位质量的高比容量，高的第一循环效率，每电极体积的高容量和长的循环寿命 。

公开(公告)号：US09029019B2

公开(公告)日：2015-05-12

申请号：US11893398

申请日：2007-08-17

申请人： Bor Z. Jang ,  Aruna Zhamu ,  Jinjun Shi ,  Jiusheng Guo

发明人： Bor Z. Jang ,  Aruna Zhamu ,  Jinjun Shi ,  Jiusheng Guo

IPC分类号： H01M4/587 ,  H01M4/131 ,  H01G11/50 ,  H01M10/0525 ,  H01M4/62

CPC分类号： H01M4/587 ,  H01G11/50 ,  H01M4/131 ,  H01M4/621 ,  H01M4/624 ,  H01M4/625 ,  H01M10/0525 ,  Y02E60/122 ,  Y02E60/13

摘要： A lithium secondary battery comprising a positive electrode, a negative electrode comprising a carbonaceous material which is capable of absorbing and desorbing lithium ions, and a non-aqueous electrolyte disposed between the negative electrode and the positive electrode. The carbonaceous material comprises a graphite crystal structure having an interplanar spacing d002 of at least 0.400 nm (preferably at least 0.55 nm) as determined from a (002) reflection peak in powder X-ray diffraction. This larger interplanar spacing implies a larger interstitial space between two graphene planes to accommodate a greater amount of lithium. The battery exhibits an exceptional specific capacity, excellent reversible capacity, and long cycle life.