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公开(公告)号：WO2021242831A2
公开(公告)日：2021-12-02
申请号：PCT/US2021/034209
申请日：2021-05-26
Applicant: WORCESTER POLYTECHNIC INSTITUTE
Inventor： WANG, Yan , MA, Xiaotu , GRATZ, Eric , FU, Jinzhao , VANAPHUTI, Panawan
IPC: C01D15/00 , C30B1/02 , H01M10/052 , H01M10/54 , B22F8/00 , C30B29/16 , C30B1/04 , C30B1/12 , C30B29/22 , C30B29/52 , H01M2004/028 , H01M4/505 , H01M4/525
Abstract: A recycling and synthesis of charge material for secondary batteries generates single-crystal charge materials for producing batteries with greater charge cycle longevity. Charge material particles undergo a heating for fusing or enhancing grain boundaries between polycrystalline particles. The resulting, more well-defined grain boundaries are easily etched by a relatively weak mineral acid solution. The acid solution removes material at the grain boundaries to separate secondary particles into primary particles along the grain boundaries. The resulting single crystal (monocrystalline) charge material particles are washed and filtered, and typically re-sintered to accommodate any needed lithium (lithium carbonate), and result in a charge material with larger surface area, higher lithium diffusivity and lower cation ordering.
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公开(公告)号：WO2018209164A1
公开(公告)日：2018-11-15
申请号：PCT/US2018/032186
申请日：2018-05-11
Applicant: WORCESTER POLYTECHNIC INSTITUTE
Inventor： WANG, Yan , MU, Xiaotu
IPC: H01M10/54
CPC classification number: H01M10/54
Abstract: Cathode material from exhausted lithium ion batteries are dissolved in a solution for extracting the useful elements Co (cobalt), Ni (nickel), Al (Aluminum) and Mn (manganese) to produce active cathode materials for new batteries. The solution includes compounds of valuable charge materials such as cobalt, nickel, aluminum and manganese dissolved as compounds from the exhausted cathode material of spent cells. However, LiFePO 4 is a waste stream charge material often discarded due to infeasibility of recycling. LiFePO 4 is precipitated as FePO 4 and remains as a by-product, along with graphite and carbon, which are not dissolved into the solution. FePO 4 can be separated from graphite and carbon, FePO 4 can be used to synthesize LiFePO 4 as cathode materials and graphite can be regenerated as anode materials.
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公开(公告)号：WO2016025793A1
公开(公告)日：2016-02-18
申请号：PCT/US2015/045204
申请日：2015-08-14
Applicant: WORCESTER POLYTECHNIC INSTITUTE
Inventor： WANG, Yan , WANG, Qiang
CPC classification number: C25C5/02 , C25B1/02 , C25B9/06 , C25B11/02 , C25B11/0415 , C25C7/00 , C25C7/02
Abstract: The iron and steel industry has a history of environmental consciousness and efforts are continually made to reduce energy consumption and CO 2 emissions. However the carbothermic process has approached limits on the further reduction of greenhouse gas emissions, and only marginal improvements can be expected. Low temperature electrolysis using a dispersion medium to efficiently distribute charge throughout a colloid mixture including iron oxide provides an environmentally friendly method for performing an electrochemical reduction of Fe 2 O 3 to produce granular Fe. An electrical-ionic conductive colloidal electrode containing the electrochemically active species (Fe 2 O 3 particles), the liquid electrolyte (NaOH solution), and a percolating electrical conductor (carbon network) is utilized to produce Fe. The resulting simultaneous percolation of electrons and ions effectively increases the area of the current collector, and enables the process to function at higher currents and rate of charge transfer than static electrolysis.
Abstract translation: 钢铁工业具有环保意识的历史，不断努力减少能源消耗和二氧化碳排放。 然而，碳热还原过程对进一步减少温室气体排放的限制已达到极限，只能预期微小的改善。 使用分散介质的低温电解以有效地分配电荷到包括氧化铁在内的胶体混合物中提供了一种环境友好的方法，用于进行Fe 2 O 3的电化学还原以产生粒状Fe。 使用含有电化学活性物质（Fe 2 O 3颗粒），液体电解质（NaOH溶液）和渗透电导体（碳网络）的电离离子导电胶体电极来生产Fe。 所产生的电子和离子的同时渗透有效地增加了集电器的面积，并且使得该工艺能够在比静电解更高的电流和电荷转移速率下起作用。
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公开(公告)号：WO2017091562A1
公开(公告)日：2017-06-01
申请号：PCT/US2016/063294
申请日：2016-11-22
Applicant: WORCESTER POLYTECHNIC INSTITUTE
Inventor： WANG, Yan , GRATZ, Eric , SA, Qina , ZHENG, Zhangfeng , HEELAN, Joseph
CPC classification number: H01M10/54 , B09B3/00 , C01G53/006 , C01G53/42 , C01G53/50 , C22B7/006 , H01M4/525 , Y02P10/234 , Y02W30/84
Abstract: Cathode material from exhausted lithium ion batteries are dissolved in a solution for extracting the useful elements Co (cobalt), Ni (nickel), Al (Aluminum) and Mn (manganese) to produce active cathode materials for new batteries. The solution includes compounds of desirable materials such as cobalt, nickel, aluminum and manganese dissolved as compounds from the exhausted cathode material of spent cells. Depending on a desired proportion, or ratio, of the desired materials, raw materials are added to the solution to achieve the desired ratio of the commingled compounds for the recycled cathode material for new cells. The desired materials precipitate out of solution without extensive heating or separation of the desired materials into individual compounds or elements. The resulting active cathode material has the predetermined ratio for use in new cells, and avoids high heat typically required to separate the useful elements because the desired materials remain commingled in solution.
Abstract translation: 将来自耗尽的锂离子电池的阴极材料溶解在用于提取有用元素Co（钴），Ni（镍），Al（铝）和Mn（锰）的溶液中以产生活性阴极材料用于 新电池。 该溶液包括所需材料的化合物，例如钴，镍，铝和锰，作为来自废电池的耗尽阴极材料的化合物溶解。 根据所需材料的所需比例或比例，将原料加入到溶液中以达到用于新电池的再循环阴极材料的混合化合物的所需比例。 所需材料从溶液中沉淀出来而没有大量加热或将所需材料分离成单个化合物或元素。 所得到的活性阴极材料具有用于新电池的预定比例，并且避免了分离有用元件通常需要的高热量，因为期望的材料保持混合在溶液中。
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公开(公告)号：WO2023034556A1
公开(公告)日：2023-03-09
申请号：PCT/US2022/042434
申请日：2022-09-02
Applicant: WORCESTER POLYTECHNIC INSTITUTE
Inventor： WANG, Yan , MA, Xiaotu
Abstract: A method for recycling secondary battery charge materials includes a one-step molten-salt process to upcycle mixed Ni-lean polycrystalline NMC cathodes into Ni-rich single-crystal NMC cathodes. The method includes receiving a recycling stream of charge materials from end-of-lifetime batteries, adding additional charge materials based on an upcycled battery chemistry intended for the upgraded, recycled battery, and sintering the combined charge materials for generating a single crystal charge material corresponding to the upcycled battery chemistry using a molten salt direct recycling process.
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Patent Agency Ranking
公开(公告)号：WO2020139823A1
公开(公告)日：2020-07-02
申请号：PCT/US2019/068303
申请日：2019-12-23
Applicant: WORCESTER POLYTECHNIC INSTITUTE
Inventor： WANG, Yan , ZHENG, Zhangfeng , LUDWIG, Brandon , PAN, Heng , LIU, Jin , LIU, Yangtao
IPC: H01M4/139 , H01M4/62 , H01M10/052 , H01M10/0585
Abstract: A dry electrode manufacturing process is employed for low cost battery through a dry mixing and formation process. A thermal activation renders the dry fabricated electrode comparable to conventional slurry casted electrodes. The dry electrode mixture results from a combination of a plurality of types of constituent particles, including at least an active charge material and a binder, and typically a conductive material such as carbon. The process heats the deposited mixture to a moderate temperature for activating the binder for adhering the mixture to the substrate, and compresses the deposited mixture to a thickness for achieving an electrical sufficiency of the compressed, deposited mixture as a charge material in a lithium-ion battery. In order to increase the bonding between the current collector and charge materials, an adhesive interlayer is applied through dry printing.
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公开(公告)号：WO2017040917A1
公开(公告)日：2017-03-09
申请号：PCT/US2016/050096
申请日：2016-09-02
Applicant: WORCESTER POLYTECHNIC INSTITUTE
Inventor： WANG, Yan , ZHENG, Zhangfeng , LUDWIG, Brandon , PAN, Heng
CPC classification number: H01M4/0419 , B05B5/032 , B05B5/1683 , B05D1/06 , B05D3/0254 , B05D3/12 , B05D2401/32 , H01M4/0404 , H01M4/0435 , H01M4/0471 , H01M4/485 , H01M4/505 , H01M4/525 , H01M4/5825 , H01M4/623 , H01M4/625 , H01M10/052
Abstract: A dry electrode manufacturing process employed for low cost battery through a dry mixing and formation process. A thermal activation renders the dry fabricated electrode comparable to conventional slurry casted electrodes. The dry electrode mixture results from a combination of a plurality of types of constituent particles, including at least an active charge material and a binder, and typically a conductive material such as carbon. The process heats the deposited mixture to a moderate temperature for activating the binder for adhering the mixture to the substrate; and compresses the deposited mixture to a thickness for achieving an electrical sufficiency of the compressed, deposited mixture as a charge material in a battery.
Abstract translation: 干式电极制造方法，其通过干式混合和形成方法用于低成本电池。 热激活使得干燥的制造电极与常规的浆料铸造电极相当。 干电极混合物是由至少包括活性电荷材料和粘合剂的多种构成颗粒的组合以及通常的导电材料如碳组成的。 该方法将沉积的混合物加热至中等温度，以激活粘合剂以将混合物粘附到基底上; 并将沉积的混合物压缩到一个厚度，以实现作为电池中的电荷材料的压缩沉积的混合物的电气充足性。
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公开(公告)号：EP4141133A1
公开(公告)日：2023-03-01
申请号：EP21213247.6
申请日：2021-12-08
Applicant: Worcester Polytechnic Institute
Inventor： WANG, Yan , GRATZ, Eric , SA, Qina , ZHENG, Zhangfeng , HEELAN, Joseph , KIM, Kee-Chan
Abstract: Cathode material from exhausted lithium ion batteries are dissolved in a solution for extracting the useful elements Co (cobalt), Ni (nickel), Al (Aluminum) and Mn (manganese) to produce active cathode materials for new batteries. The solution includes compounds of desirable materials such as cobalt, nickel, aluminum and manganese dissolved as compounds from the exhausted cathode material of spent cells. Depending on a desired proportion, or ratio, of the desired materials, raw materials are added to the solution to achieve the desired ratio of the commingled compounds for the recycled cathode material for new cells. The desired materials precipitate out of solution without extensive heating or separation of the desired materials into individual compounds or elements. The resulting active cathode material has the predetermined ratio for use in new cells, and avoids high heat typically required to separate the useful elements because the desired materials remain commingled in solution.
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9.发明公开
公开(公告)号：EP4465390A1
公开(公告)日：2024-11-20
申请号：EP24176462.0
申请日：2024-05-16
Applicant: Plug Power, Inc. , Worcester Polytechnic Institute
Inventor： SWIDER LYONS, Karen , YANG, Fan , LIU, Zhenyu , WANG, Yan , YAO, Zeyi , ZHENG, Yadong , JIN, Wenting
Abstract: The present invention provides a method of fuel cell recycling, including inserting a fuel cell in a solution to loosen a bond between a first plate and a membrane electrode assembly and a second plate and the membrane electrode assembly of the fuel cell, separating the membrane electrode assembly from the first plate and the second plate, and acid leaching the membrane electrode assembly to obtain a precious metal.
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10.发明公开
公开(公告)号：EP4464823A1
公开(公告)日：2024-11-20
申请号：EP24176465.3
申请日：2024-05-16
Applicant: Plug Power, Inc. , Worcester Polytechnic Institute
Inventor： SWIDER LYONS, Karen , YANG, Fan , LIU, Zhenyu , WANG, Yan , YAO, Zeyi , ZHENG, Yadong , JIN, Wenting
Abstract: The present invention provides a method of electrolyzer recycling, including inserting an electrolyzer in a solution to loosen a bond between a first plate and a membrane electrode assembly and a second plate and the membrane electrode assembly of the electrolyzer, separating the membrane electrode assembly from the first plate and the second plate, acid leaching the membrane electrode assembly to obtain a first precious metal, and dispersing the membrane electrode assembly to obtain a second precious metal.
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