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公开(公告)号：US20240088397A1
公开(公告)日：2024-03-14
申请号：US18463319
申请日：2023-09-08
发明人： Wei HUANG , Soon Yee LIEW , Shengbo LU , Chenmin LIU
IPC分类号： H01M4/66 , H01M4/04 , H01M4/80 , H01M10/052 , H01M50/105
CPC分类号： H01M4/663 , H01M4/0409 , H01M4/045 , H01M4/0471 , H01M4/80 , H01M10/052 , H01M50/105 , H01M2004/021
摘要： A self-assembled freestanding graphene membrane or graphene layer is formed from industrial graphene having a particle size from approximately 1 to 10 microns and cellulose nanofibers having a nanofiber size from approximately 1 to 9 microns. The self-assembled freestanding graphene membrane or graphene layer has a graphene to cellulose nanofiber mass ratio of approximately 12:1 to 20:1, an electrical conductivity of between approximately 5.8 and 7.2 S/cm, and a thermal conductivity of between 2000 and 3000 W m−1 K−1. The freestanding graphene membrane or graphene layer is formed from an aqueous dispersion of graphene and cellulose nanofibers in a mass ratio of graphene to cellulose nanofibers of 20:1 to 10:1 deposited on a substrate followed by self-assembly and drying. A dopant of oxygen, nitrogen, sulfur, nickel, gold, silver, zinc, copper, magnesium, and boron may be precisely incorporated into the graphene membrane or layer.
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公开(公告)号：US20230129505A1
公开(公告)日：2023-04-27
申请号：US17968824
申请日：2022-10-19
发明人： Yiu Sun TAM , Yong ZHU , Chenmin LIU
IPC分类号： C09J133/08
摘要： A cure-on-demand adhesive kit capable of self-sustaining frontal polymerization after a heat or actinic radiation trigger for bonding two substrates is provided. The kit includes a first monomer/oligomer component and a UV or thermal cure catalyst component. In practical application, the first monomer/oligomer component and the UV or thermal cure catalyst component are mixed together to form a ready-to-use prepolymer mixture. The prepolymer mixture is applied onto the surface of a first substrate, and the first substrate is contacted with a second substrate by the mixture applied side. After giving a heat or actinic radiation trigger, a self-sustaining frontal polymerization of the mixture will be started for curing the mixture between two substrates as an adhesive to adhere the two substrates.
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公开(公告)号：US20220190325A1
公开(公告)日：2022-06-16
申请号：US17543657
申请日：2021-12-06
发明人： Chi Ho KWOK , Wing Yin YUNG , Wing Lung HON , Shengbo LU , Chenmin LIU
IPC分类号： H01M4/36 , D01D5/00 , H01M10/0525 , H01M4/525 , H01M4/505
摘要： The preset invention provides an electrode structure for a lithium ion battery comprising an electrode selected from a cathode including a lithium-based material or an anode including a conductive material, and a melt-convertible encapsulation layer covering at least one surface layer of the electrode. The melt-convertible encapsulation layer comprises a network of nanofibers having the diameter ranging approximately from 100 to 300 nm and polymer microspheres embedded in and coated on the nanofibrous network, wherein the ratio of the diameter of the polymer microspheres to the diameter of the nanofiber is over 30. The polymer microspheres melt to form a dielectric coating of the electrode so as to prevent fire or thermal runaway at a temperature approximately from 100 to 200° C.
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4.发明申请公开(公告)号：US20210404093A1
公开(公告)日：2021-12-30
申请号：US17344929
申请日：2021-06-10
发明人： Yong ZHU , Song WANG , Jianping HAN , Chenmin LIU
摘要： The invention relates to multi-component shape memory threads, fibers, tubes, or tapes, which includes at least two shape-memory polymeric (SMP-N) components. Each of the at least two SMP-N components is of at least 1% of the total weight, and N is a positive integer starting from 1, and the SMP-N components have a selectively engineered shape recovery temperature (Tr) between approximately 0° C. to 130° C. Also, when TrN and TrN+1 are higher than room temperature, the threads, fibers, tubes, or tapes are configured to assume a substantially helical configuration upon heating to above TrN and lower than TrN+1 by a stimulus when an elongation of the threads, fibers, tubes, or tapes is approximately 30% to approximately 300%, and having a coil diameter from 0.5 to 10 mm and a number of the turns per cm from 5 to 30.
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公开(公告)号：US20150360409A1
公开(公告)日：2015-12-17
申请号：US14721002
申请日：2015-05-26
发明人： Chenmin LIU , Lifeng CAI , Ka Kan WONG , Shing Yan CHOI
CPC分类号： B29C48/142 , B01D67/0004 , B01D69/10 , B01D71/26 , B01D71/32 , B01D71/34 , B01D71/76 , B01D2323/39 , B29K2023/06 , B29K2023/12 , B29K2027/12 , B29K2027/16 , B29L2009/00 , B29L2031/3468 , B29L2031/755 , H01M2/145 , H01M2/162 , H01M2/1666 , H01M2/1673 , H01M2/1686 , H01M10/0525 , H01M10/0566 , H01M2300/0065 , H01M2300/0085
摘要： This invention provides a method for fabricating a flexible porous film. One application of the film is for fabricating a flexible lithium-ion battery. The method comprises depositing at least one electrospun layer on a flexible substrate sheet by electrospinning. The solution used in electrospinning comprises polyvinylidene fluoride (PVDF) and poly(vinylidene fluoride-hexafluoropropylene) (PVdF-HFP) copolymer dispersed in a solvent such that the solution has a polymer viscosity between 300 cP to 1500 cP. A preferred setting of electrospinning process parameters includes a voltage between 20 kV and 50 kV, a feed rate between 3 ml/h and 12 ml/h, and a spinning height between 100 mm and 150 mm. Preferably, PVDF and PVdF-HFP has a weight ratio between 1:1 and 5:1. The solvent may comprise dimethylformamide (DMF) and acetone in a weight ratio between 1:2 and 8:2. The weight of the copolymer is preferable to be 5% to 25% of a total weight of the copolymer and the solvent.
摘要翻译： 本发明提供一种柔性多孔膜的制造方法。 膜的一个应用是用于制造柔性锂离子电池。 该方法包括通过静电纺丝在柔性基片上沉积至少一个电纺丝层。 用于静电纺丝的溶液包括分散在溶剂中的聚偏二氟乙烯（PVDF）和聚（偏二氟乙烯 - 六氟丙烯）（PVdF-HFP）共聚物，使得该溶液的聚合物粘度在300cP至1500cP之间。 静电纺丝工艺参数的优选设置包括20kV至50kV之间的电压，3ml / h至12ml / h之间的进料速率以及100mm至150mm之间的纺丝高度。 优选地，PVDF和PVdF-HFP的重量比为1:1至5:1。 溶剂可以包括重量比为1:2至8:2的二甲基甲酰胺（DMF）和丙酮。 共聚物的重量优选为共聚物和溶剂总重量的5〜25％。
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公开(公告)号：US20230378800A1
公开(公告)日：2023-11-23
申请号：US18319493
申请日：2023-05-18
发明人： Cheuk Yin LEE , Yam CHONG , Shengbo LU , Chenmin LIU
CPC分类号： H02J7/35 , H02J7/00304 , H02J7/007182 , H02J7/00308 , H02J2207/20
摘要： A solar-powered position tracker includes a load including one or more of a GPS module, a GPS antenna, a GSM module, or a GSM antenna. The load is powered by a rechargeable battery, which may be charged by one or more of a non-rechargeable primary battery and a solar cell. The solar-powered position tracker includes a battery management system for powering the position tracker by controlling the solar cell, rechargeable battery and the non-rechargeable primary battery. The two-stage battery management system charges the rechargeable battery in two stages and includes a solar management and protection circuit interconnecting the solar cell, and the rechargeable battery. The battery management system is configured to execute a charging process for recharging the rechargeable battery from solar cell and protect the rechargeable battery under a high pulse current discharge process to meet a high current or high pulse current discharge demand by the load.
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公开(公告)号：US20200044236A1
公开(公告)日：2020-02-06
申请号：US16599139
申请日：2019-10-11
发明人： Juncao BIAN , Shengbo LU , Chenmin LIU , Wai Yin WONG , Hong ZHAO
IPC分类号： H01M4/133 , H01M10/0525 , H01M4/66
摘要： A fast charge lithium ion battery capable of being charged or discharged with 80% capacity retention at C rate of at least 2C is provided in the present invention, which includes a fast charge graphite-based anode; a cathode; and a separator, wherein the anode includes an anode current collector and a fast charge graphite layer deposited on at least one surface of the anode current collector, the fast charge graphite having a lattice constant equals to or larger than 0.3374 nm, a D-band to G-band integrated area ratio (ID/IG) of 0.03 to 0.3, and a surface morphology of a plate-like crystal structure under a scanned electron microscope; the cathode includes a cathode current collector and one or more active materials deposited on at least one surface of the cathode current collector.
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8.发明申请Metal/Non-Metal Co-Doped Lithium Titanate Spheres with Hierarchical Micro/Nano Architectures for High Rate Lithium Ion Batteries 有权用于高速率锂离子电池的分级微/纳米结构的金属/非金属共掺钛酸锂球公开(公告)号：US20140342228A1
公开(公告)日：2014-11-20
申请号：US14250369
申请日：2014-04-10
发明人： Chenmin LIU , Lifeng CAI , Shing Yan CHOI
IPC分类号： H01M4/36
CPC分类号： H01M4/366 , C01G23/005 , H01M4/485 , H01M10/0525 , H01M2004/027
摘要： The present invention is to provide a lithium titanate (LTO) material for a lithium ion battery. The LTO material has hierarchical micro/nano architecture, and comprises a plurality of micron-sized secondary LTO spheres, and a plurality of pores incorporated with metal formed by a metal dopant. Each of the micron-sized secondary LTO spheres comprises a plurality of nano-sized primary LTO particles. A plurality of the nano-sized primary LTO particles is encapsulated by a non-metal layer formed by a non-metal dopant. The LTO material of the present invention has high electrical conductivity for increasing the capacity at high charging/discharging rates, and energy storage capacity.
摘要翻译： 本发明提供一种用于锂离子电池的钛酸锂（LTO）材料。 LTO材料具有分级的微/纳米结构，并且包括多个微米级的次级LTO球体和与由金属掺杂剂形成的金属结合的多个孔。 每个微米尺寸的次级LTO球体包括多个纳米尺寸的主LTO颗粒。 多个纳米尺寸的初级LTO颗粒被非金属掺杂剂形成的非金属层封装。 本发明的LTO材料具有高电导率，用于增加高充电/放电速率下的容量和储能能力。
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公开(公告)号：US20240110059A1
公开(公告)日：2024-04-04
申请号：US18537825
申请日：2023-12-13
发明人： Yong ZHU , Jianping HAN , Chenmin LIU
CPC分类号： C08L75/04 , B29C41/003 , B29C41/46 , B29K2075/00 , C08L2201/12 , C08L2203/14
摘要： The present invention provides an energy absorbing foam material includes at least one shape memory polymer foam having a non-impact resistant configuration in a first force-application time, an impact resistant configuration in a second force-application time at a working temperature, a first glass transition temperature equal to or lower than a working temperature in the first force-application time, and a second glass transition temperature higher than a working temperature in the second force-application time. A second elastic modulus of the shape memory polymer foam in the second force-application time is at least 10 times than a first elastic modulus of the shape memory polymer form in the first force-application time at the working temperature.
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公开(公告)号：US20220165681A1
公开(公告)日：2022-05-26
申请号：US17530483
申请日：2021-11-19
发明人： Chi Ho KWOK , Xiaohua CHEN , Wai Chung LI , Chenmin LIU
IPC分类号： H01L23/552 , H01F1/34 , C01B32/21 , H01F1/00
摘要： The present invention provides an EMI shielding device including a flame retarding, thermal interface material composite with a through plane thermal conductivity of no less than 30 W/mK and a dielectric withstanding voltage of no less than 1 kV/mm, where the composite includes at least one dielectric layer of self-aligned, carbon-based materials associated with superparamagnetic particles and at least one layer of fillers including a blend of dielectric heat transfer materials with a thermal or UV curable polymer or phase change polymer. The anisotropic heat transfer carbon-based materials associated with superparamagnetic materials are aligned under a low magnetic field strength of less than 1 Tesla to an orientation that results in a high thermal conductivity direction which can conduct the maximum heat from the adjacent device of the present composite. The present invention also provides a method for preparing the composite.
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