公开(公告)号：US20100021819A1

公开(公告)日：2010-01-28

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： H01M4/58

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）石墨烯血小板的长度或宽度在10nm至10um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：US20090117467A1

公开(公告)日：2009-05-07

申请号：US11982672

申请日：2007-11-05

申请人： Aruna Zhamu ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Bor Z. Jang

IPC分类号： H01M4/58 ,  H01M4/40

CPC分类号： H01M4/133 ,  H01M4/134 ,  H01M4/136 ,  H01M4/139 ,  H01M4/38 ,  H01M4/386 ,  H01M4/387 ,  H01M4/621 ,  H01M4/625 ,  H01M10/0525

摘要： The present invention provides a nano-scaled graphene platelet-based composite material composition for use as an electrode, particularly as an anode of a lithium ion battery. The composition comprises: (a) micron- or nanometer-scaled particles or coating which are capable of absorbing and desorbing lithium ions; and (b) a plurality of nano-scaled graphene platelets (NGPs), wherein a platelet comprises a graphene sheet or a stack of graphene sheets having a platelet thickness less than 100 nm; wherein at least one of the particles or coating is physically attached or chemically bonded to at least one of the graphene platelets and the amount of platelets is in the range of 2% to 90% by weight and the amount of particles or coating in the range of 98% to 10% by weight. Also provided is a lithium secondary battery comprising such a negative electrode (anode). The battery exhibits an exceptional specific capacity, an excellent reversible capacity, and a long cycle life.

摘要翻译： 本发明提供一种用作电极的纳米级石墨烯基小片基复合材料组合物，特别是作为锂离子电池的阳极。 组合物包括：（a）能够吸收和解吸锂离子的微米级或纳米级的颗粒或涂层; 和（b）多个纳米级石墨烯血小板（NGP），其中血小板包括石墨烯片或具有小于100nm的血小板厚度的石墨烯片堆叠; 其中所述颗粒或涂层中的至少一个物理附着或化学键合到所述石墨烯片晶中的至少一个，并且所述血小板的量在2重量％至90重量％的范围内，并且所述颗粒或涂层的量在所述范围内 为98〜10重量％。 还提供了包含这种负极（阳极）的锂二次电池。 电池具有特殊的比容量，极好的可逆容量和较长的循环寿命。

公开(公告)号：US20090028778A1

公开(公告)日：2009-01-29

申请号：US11881390

申请日：2007-07-27

申请人： Aruna Zhamu ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Bor Z. Jang

IPC分类号： C01B31/04

CPC分类号： B82Y30/00 ,  B82Y40/00 ,  C01B32/15 ,  C01B32/19 ,  C01B32/22 ,  C01B32/225 ,  C01B2204/04

摘要： A carboxylic-intercalated graphite compound composition for the production of exfoliated graphite, flexible graphite, or nano-scaled graphene platelets. The composition comprises a layered graphite with interlayer spaces or interstices and a carboxylic acid residing in at least one of the interstices, wherein the composition is prepared by a chemical oxidation reaction which uses a combination of a carboxylic acid and hydrogen peroxide as an intercalate source. Alternatively, the composition may be prepared by an electrochemical reaction, which uses a carboxylic acid as both an electrolyte and an intercalate source. Exfoliation of the invented composition does not release undesirable chemical contaminants into air or drainage.

摘要翻译： 用于生产剥离石墨，柔性石墨或纳米级石墨烯血小板的羧基插层石墨化合物组合物。 所述组合物包含具有层间空间或空隙的层状石墨和位于至少一个间隙中的羧酸，其中所述组合物通过化学氧化反应制备，所述化学氧化反应使用羧酸和过氧化氢的组合作为插层源。 或者，组合物可以通过电化学反应制备，其使用羧酸作为电解质和插层源。 本发明组合物的剥落不会将不期望的化学污染物排放到空气或排水中。

公开(公告)号：US20080299419A1

公开(公告)日：2008-12-04

申请号：US11807379

申请日：2007-05-29

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： H01M8/02

CPC分类号： H01M8/0228 ,  H01M8/0206 ,  H01M8/0213 ,  H01M8/0226 ,  Y10T428/24942

摘要： An electrically conductive laminate composition for fuel cell flow field plate or bipolar plate applications. The laminate composition comprises at least a thin metal sheet having two opposed exterior surfaces and a first exfoliated graphite composite sheet bonded to the first of the two exterior surfaces of the metal sheet wherein the exfoliated graphite composite sheet comprises: (a) expanded or exfoliated graphite and (b) a binder or matrix material to bond the expanded graphite for forming a cohered sheet, wherein the binder or matrix material is between 3% and 60% by weight based on the total weight of the first exfoliated graphite composite sheet. Preferably, the first exfoliated graphite composite sheet further comprises particles of non-expandable graphite or carbon in the amount of between 3% and 60% by weight based on the total weight of the non-expandable particles and the expanded graphite. Further preferably, the laminate comprises a second exfoliated graphite composite sheet bonded to the second surface of the metal sheet to form a three-layer laminate. Surface flow channels and other desired geometric features can be built onto the exterior surfaces of the laminate to form a flow field plate or bipolar plate. The resulting laminate has an exceptionally high thickness-direction conductivity and excellent resistance to gas permeation.

摘要翻译： 一种用于燃料电池流场板或双极板应用的导电层压组合物。 所述层叠组合物至少包括具有两个相对的外表面的薄金属片和与所述金属片的两个外表面中的第一外表面结合的第一剥离石墨复合片，其中所述剥离石墨复合片包括：（a）膨胀或剥落的石墨 和（b）粘合剂或基质材料，以结合用于形成粘结片材的膨胀石墨，其中基于第一剥离石墨复合片材的总重量，粘合剂或基质材料为3重量％至60重量％。 优选地，基于不可膨胀颗粒和膨胀石墨的总重量，第一剥离石墨复合片材还包含不可膨胀石墨或碳的颗粒，其量为3重量％至60重量％。 进一步优选地，层压体包括结合到金属板的第二表面的第二剥离石墨复合片，以形成三层层压体。 可以在层压板的外表面上形成表面流动通道和其它期望的几何特征，以形成流场板或双极板。 所得到的层压体具有非常高的厚度方向导电性和优异的耐气体渗透性。

公开(公告)号：US20080268318A1

公开(公告)日：2008-10-30

申请号：US11644122

申请日：2006-12-26

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

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

IPC分类号： H01M2/00

CPC分类号： H01M8/0221 ,  H01M8/0206 ,  H01M8/0213 ,  H01M8/0228 ,  H01M8/0258 ,  H01M8/0267 ,  H01M8/241 ,  H01M2008/1095 ,  Y02E60/50

摘要： The present invention provides a carbon-cladded composite composition for use as a fuel cell flow field plate or bipolar plate. In one preferred embodiment, the composition comprises a core composite layer sandwiched between two clad layers, wherein (a) the clad layer comprises a conductive carbon or graphite material (e.g., carbon nano-tubes, nano-scaled graphene plates, graphitic nano-fibers, and fine graphite particles); (b) the core composite layer comprises a matrix resin and a conductive filler present in a sufficient quantity to render the composite layer electrically conductive with an electrical conductivity no less than 1 S/cm (preferably no less than 100 S/cm); and (c) the composition has a planar outer surface on each clad side having formed therein a fluid flow channel.

摘要翻译： 本发明提供一种用作燃料电池流场板或双极板的碳包覆复合组合物。 在一个优选的实施方案中，组合物包含夹在两个包层之间的芯复合层，其中（a）包覆层包含导电碳或石墨材料（例如，碳纳米管，纳米级石墨烯板，石墨纳米纤维 ，和细石墨颗粒）; （b）芯复合层包括基质树脂和导电填料，其量足以使复合层导电，导电率不小于1S / cm（优选不小于100S / cm）; 和（c）组合物在每个包覆侧上具有形成有流体流动通道的平面外表面。

公开(公告)号：US20080206124A1

公开(公告)日：2008-08-28

申请号：US11709274

申请日：2007-02-22

申请人： Bor Z. Jang ,  Aruna Zhamu

发明人： Bor Z. Jang ,  Aruna Zhamu

IPC分类号： C01B31/04 ,  B29C65/00 ,  C01B17/00 ,  C01G11/02 ,  C01G28/00 ,  C01G30/00 ,  C01G33/00 ,  C01G39/00 ,  C01G45/02 ,  C09C1/56 ,  C01G9/02 ,  C01G7/00 ,  C01G57/00 ,  C01G53/04 ,  C01G51/02 ,  C01G5/00 ,  C01G49/02 ,  C01G47/00 ,  C01G41/00 ,  C01G35/00 ,  C01G31/02 ,  C01G3/02 ,  C01G13/02 ,  C01B19/04 ,  C01B31/00

CPC分类号： B82Y40/00 ,  B82Y30/00 ,  C01B32/15 ,  C01B32/22 ,  C01B32/225 ,  C01B32/23 ,  C01B33/40 ,  C01B2204/04 ,  C01P2004/24 ,  C09C1/44 ,  C09C1/46

摘要： Disclosed is 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, and often between 0.34 nm and 1.02 nm. The method comprises: (a) subjecting the layered material in a powder form to a halogen vapor at a first temperature above the melting point or sublimation point of the halogen at a sufficient vapor pressure and for a duration of time sufficient to cause the halogen molecules to penetrate an interlayer space of the layered material, forming a stable halogen-intercalated compound; and (b) heating the halogen-intercalated compound at a second temperature above the boiling point of the halogen, allowing halogen atoms or molecules residing in the interlayer space to exfoliate the layered material to produce the platelets. Alternatively, rather than heating, step (a) is followed by a step of dispersing the halogen-intercalated compound in a liquid medium which is subjected to ultrasonication for exfoliating the halogen-intercalated compound to produce the platelets, which are dispersed in the liquid medium. The halogen can be readily captured and re-used, thereby significantly reducing the impact of halogen to the environment. The method can further include a step of dispersing the platelets in a polymer or monomer solution or suspension as a precursor step to nanocomposite fabrication.

摘要翻译： 公开了一种剥离层状材料（例如石墨和氧化石墨）以产生厚度小于100nm，通常小于10nm，通常在0.34nm和1.02nm之间的纳米级片晶的方法。 该方法包括：（a）在高于卤素的熔点或升华点的第一温度下以足够的蒸汽压将粉末形式的层状材料经受卤素蒸气，持续足以引起卤素分子 穿透层状材料的层间空间，形成稳定的卤素插层化合物; 和（b）在高于卤素沸点的第二温度下加热卤素插层的化合物，使得驻留在层间空间中的卤素原子或分子剥离层状材料以产生血小板。 或者，步骤（a）不是加热，而是将卤素插入化合物分散在液体介质中的步骤，该液体介质经过超声波处理以使卤素插层化合物剥离以产生分散在液体介质中的血小板 。 可以容易地捕获和重新使用卤素，从而显着降低卤素对环境的影响。 该方法还可以包括将血小板分散在聚合物或单体溶液或悬浮液中作为前体步骤的纳米复合制备的步骤。

公开(公告)号：US20080182153A1

公开(公告)日：2008-07-31

申请号：US11699176

申请日：2007-01-30

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

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

IPC分类号： H01M4/00

CPC分类号： H01M4/90 ,  H01M4/8652 ,  H01M4/881 ,  H01M4/9083 ,  H01M4/926

摘要： Disclosed are an electro-catalyst composition and a precursor electro-catalyst composition (e.g., ink or suspension) for use in a fuel cell that exhibits improved power output. The electro-catalyst composition comprises: (a) a catalyst un-supported or supported on an electronically conducting carrier (e.g., carbon black particles); and (b) an ion-conducting and electron-conducting coating material in physical contact with the catalyst and/or coated on a surface of the carrier, wherein the coating material has an electronic conductivity no less than 10−4 S/cm (preferably no less than 10−2 S/cm) and an ion conductivity no less than 10−5 S/cm (preferably no less than 10−3 S/cm). Also disclosed are a fuel cell electrode comprising this composition, a membrane-electrode assembly (MEA) comprising this composition, and a fuel cell comprising this composition.

摘要翻译： 公开了用于燃料电池中的电催化剂组合物和前体电催化剂组合物（例如油墨或悬浮液），其表现出改进的功率输出。 电催化剂组合物包括：（a）未支撑或负载在电子导电载体（例如炭黑颗粒）上的催化剂; 和（b）与所述催化剂物理接触和/或涂覆在所述载体的表面上的离子传导和电子传导涂层材料，其中所述涂层材料具有不小于10 -4的电导率， （优选不小于10 -2 S / cm），离子电导率不低于10 -5 S / cm（优选不小于10 -3S / cm）。 还公开了包含该组合物的燃料电池电极，包含该组合物的膜 - 电极组件（MEA）和包含该组合物的燃料电池。

公开(公告)号：US20080057381A1

公开(公告)日：2008-03-06

申请号：US11515340

申请日：2006-09-05

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

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

IPC分类号： H01M8/08 ,  H01M4/90 ,  H01M8/24 ,  H01M4/92

CPC分类号： H01M4/92 ,  H01M4/9083 ,  H01M4/921 ,  H01M4/926 ,  H01M4/96 ,  H01M8/04283 ,  H01M8/083 ,  H01M8/086 ,  H01M8/241 ,  H01M8/2418 ,  H01M8/242 ,  H01M8/2455 ,  H01M8/2484

摘要： The present invention provides a light-weight, compact fuel cell that is well-suited to powering portable electronic devices and vehicles, particularly light-duty vehicles such as golf carts, forklifts, wheelchairs, motor bikes, and scooters. The fuel cell comprises the following major components: (a) a fuel anode; (b) an oxidant cathode comprising an alcohol-tolerant oxidant reduction catalyst; and (c) a liquid electrolyte in ionic contact with the anode and the cathode with the electrolyte comprising a solution and an alcohol fuel dissolved in the solution. The presently invented dissolved-fuel direct alcohol fuel cell eliminates the use of expensive polymer electrolyte membranes and, in general, do not require the use of expensive platinum as a catalyst material at the cathode and/or at the anode. The alcohol fuel may be selected from methanol, ethanol, propanol, isopropanol, formic acid, or a combination thereof. The electrolyte may comprise an acid or an alkaline solution.

摘要翻译： 本发明提供了一种重量轻的燃料电池，其非常适合为便携式电子设备和车辆，特别是轻型车辆如高尔夫球车，叉车，轮椅，电动自行车和踏板车提供动力。 燃料电池包括以下主要部件：（a）燃料阳极; （b）包含耐醇氧化剂还原催化剂的氧化剂阴极; 和（c）与阳极和阴极离子接触的液体电解质，电解质包含溶解在溶液中的溶液和醇燃料。 目前发明的溶解燃料直接醇燃料电池消除了昂贵的聚合物电解质膜的使用，并且通常不需要在阴极和/或阳极处使用昂贵的铂作为催化剂材料。 醇燃料可以选自甲醇，乙醇，丙醇，异丙醇，甲酸或其组合。 电解质可以包含酸或碱性溶液。

公开(公告)号：US20170233255A1

公开(公告)日：2017-08-17

申请号：US14998784

申请日：2016-02-17

申请人： Aruna Zhamu ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Bor Z. Jang

IPC分类号： C01B31/04 ,  C25B3/00

CPC分类号： C25B3/00 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/19 ,  C01B2204/02 ,  C01B2204/04 ,  Y10S977/734 ,  Y10S977/842 ,  Y10S977/845

摘要： A method of producing isolated graphene sheets from a layered graphite, comprising: (a) forming an alkali metal ion-intercalated graphite compound by an electrochemical intercalation which uses a liquid solution of an alkali metal salt dissolved in an organic solvent as both an electrolyte and an intercalate source, layered graphite material as an anode material, and a metal or graphite as a cathode material, and wherein a current is imposed upon a cathode and an anode at a current density for a duration of time sufficient for effecting the electrochemical intercalation of alkali metal ions into interlayer spacing; and (b) exfoliating and separating hexagonal carbon atomic interlayers (graphene planes) from the alkali metal ion-intercalated graphite compound using ultrasonication, thermal shock exposure, exposure to water solution, mechanical shearing treatment, or a combination thereof to produce isolated graphene sheets.

公开(公告)号：US20170221643A1

公开(公告)日：2017-08-03

申请号：US14998672

申请日：2016-02-01

申请人： Aruna Zhamu ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Bor Z. Jang

IPC分类号： H01G11/34 ,  B32B37/10 ,  H01G11/38 ,  H01G11/52 ,  H01G11/66 ,  B32B37/14 ,  B32B38/00

CPC分类号： H01G11/34 ,  B32B37/10 ,  B32B37/14 ,  B32B38/0004 ,  B32B2457/16 ,  H01G11/26 ,  H01G11/32 ,  H01G11/38 ,  H01G11/42 ,  H01G11/44 ,  H01G11/52 ,  H01G11/66 ,  H01G11/84 ,  H01G11/86 ,  Y02E60/13

摘要： Provided is a process for producing an electrolyte-impregnated laminar graphene structure for use as a supercapacitor electrode. The process comprises (a) preparing a graphene dispersion having multiple isolated graphene sheets dispersed in an electrolyte; and (b) subjecting the graphene dispersion to a forced assembly procedure, forcing the multiple graphene sheets to assemble into an electrolyte-impregnated laminar graphene structure, wherein the multiple graphene sheets are alternately spaced by thin electrolyte layers, less than 5 nm in thickness, and the graphene sheets are substantially aligned along a desired direction, and wherein the laminar structure has a physical density from 0.5 to 1.7 g/cm3 and a specific surface area from 50 to 3,300 m2/g, when measured in a dried state of the laminar structure with the electrolyte removed. This process leads to a supercapacitor having a large electrode thickness, high active mass loading, high tap density, and exceptional energy density.