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    • 94. 发明申请
    • Process for producing unitary graphene materials
    • 生产单一石墨烯材料的方法
    • US20140242275A1
    • 2014-08-28
    • US13815349
    • 2013-02-25
    • Aruna ZhamuMingchao WangLucy FuBor Z. Jang
    • Aruna ZhamuMingchao WangLucy FuBor Z. Jang
    • C01B31/04
    • C01B31/0469C01B31/0423C01B32/19C01B32/225
    • A process for producing a unitary graphene material, comprising: (a) preparing a graphene oxide (GO) gel having GO molecules dissolved in a fluid medium wherein the GO molecules contain higher than 20% by weight of oxygen; (b) dispensing and depositing a layer of GO gel onto a surface of a substrate to form a layer of deposited GO gel thereon, wherein the dispensing and depositing procedure includes shear-induced thinning; (c) removing the fluid medium from the deposited GO gel to form a GO layer having an inter-plane spacing d002 of 0.4 nm to 1.2 nm as determined by X-ray diffraction; and (d) heat treating the GO layer to form the unitary graphene material at a heat treatment temperature higher than 100° C. to an extent that d002 is decreased to a value of 0.3354 nm to 0.4 nm and the oxygen content is decreased to less than 5% by weight.
    • 一种制备单一石墨烯材料的方法,包括:(a)制备具有溶解在其中GO分子含有高于20重量%的氧的流体介质中的GO分子的氧化石墨烯(GO)凝胶; (b)将GO凝胶层分配并沉积到基底表面上以在其上形成沉积的GO凝胶层,其中分配和沉积步骤包括剪切诱导的稀化; (c)通过X射线衍射测定,从沉积的GO凝胶中除去流体介质以形成具有0.4nm至1.2nm的平面间距d002的GO层; 和(d)热处理GO层以在高于100℃的热处理温度下形成单一石墨烯材料,直到d002降低到0.3354nm至0.4nm的值,并且氧含量降低到更低 超过5重量%。
    • 96. 发明授权
    • Submicron-scale graphitic fibrils, methods for producing same and compositions containing same
    • 亚微米级石墨原纤维,其制造方法和含有它们的组合物
    • US08753740B2
    • 2014-06-17
    • US12592970
    • 2009-12-07
    • Aruna ZhamuBor Z. Jang
    • Aruna ZhamuBor Z. Jang
    • B32B1/00
    • H01G11/38C01B32/20D01D5/423D01F9/12D01F11/12Y02E60/13Y10T428/2918
    • The present invention provides a submicron-scaled graphitic fibril having a diameter or thickness less than 1 μm, wherein the fibril is free of continuous thermal carbon overcoat, free of continuous hollow core, and free of catalyst. The fibril is obtained by splitting a micron-scaled carbon fiber or graphite fiber along the fiber axis direction. The diameter or thickness is preferably less than 500 nm and can be greater or less than 100 nm. These graphitic fibrils exhibit exceptionally high electrical conductivity, thermal conductivity, elastic modulus, and strength. The present invention also provides several products that contain submicron graphitic fibrils: (a) paper, thin-film, mat, and web products; (b) rubber or tire products; (c) energy conversion or storage devices, such as fuel cells, lithium-ion batteries, and supercapacitors; (d) adhesives, inks, coatings, paints, lubricants, and grease products; (e) heavy metal ion scavenger; (f) absorbent (e.g., to recover spill oil); (g) sensors; (h) friction and brake components; (i) radiation-shield components; and (j) nanocomposite materials.
    • 本发明提供直径或厚度小于1μm的亚微米级石墨原纤,其中原纤维不含连续的热碳外涂层,不含连续的中空芯,并且不含催化剂。 原纤维通过沿纤维轴线方向分裂微米级碳纤维或石墨纤维而获得。 直径或厚度优选小于500nm,并且可以大于或小于100nm。 这些石墨纤维表现出特别高的导电性,导热性,弹性模量和强度。 本发明还提供了几种含有亚微米石墨原纤的产品:(a)纸,薄膜,垫和网产品; (b)橡胶或轮胎产品; (c)燃料电池,锂离子电池和超级电容器等能量转换或存储装置; (d)粘合剂,油墨,涂料,涂料,润滑剂和油脂产品; (e)重金属离子清除剂; (f)吸收剂(例如,以回收溢油); (g)传感器; (h)摩擦和制动部件; (i)辐射屏蔽部件; 和(j)纳米复合材料。
    • 97. 发明授权
    • Laminated exfoliated graphite composite-metal compositions for fuel cell flow field plate or bipolar plate applications
    • 用于燃料电池流场板或双极板应用的层压剥离石墨复合金属组合物
    • US08728679B2
    • 2014-05-20
    • US11807379
    • 2007-05-29
    • Aruna ZhamuJinjun ShiJiusheng GuoBor Z. Jang
    • Aruna ZhamuJinjun ShiJiusheng GuoBor Z. Jang
    • H01M8/24B32B7/02
    • H01M8/0228H01M8/0206H01M8/0213H01M8/0226Y10T428/24942
    • 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.
    • 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)膨胀或剥离的石墨 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。