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公开(公告)号：US11929488B2
公开(公告)日：2024-03-12
申请号：US17286614
申请日：2019-05-28
Applicant: South China University of Technology , Sihui Dabowen Industrial Co., Ltd. , Guangdong Research Institute of Rare-Metal
Inventor： Liuzhang Ouyang , Cheng Tan , Min Zhu , De Min , Hui Wang , Tongzhao Luo , Fangming Xiao , Renheng Tang
CPC classification number: H01M4/134 , C22C1/023 , C22C19/03 , C22C2202/04 , H01M2004/027
Abstract: The present invention relates to a hydrogen storage alloy, an electrode for a Ni-MH battery, a secondary battery, and a method for preparing the hydrogen storage alloy. The chemical composition of the hydrogen storage alloy is expressed by the general formula La(3.0˜3.2)xCexZrySm(1-(4.11˜4.2)x-y)NizCouMnvAlw, where x, y, z, u, v, w are molar ratios, and 0.14≤x≤0.17, 0.02≤y≤0.03, 4.60≤z+u+v+w≤5.33, 0.10≤u≤0.20, 0.25≤v≤0.30, and 0.30≤w≤0.40. The atomic ratio of the metal lanthanum (La) to the metal cerium (Ce) is fixed at 3.0 to 3.2, which satisfies the requirements of the overcharge performance of the electrode material. A side elements are largely substituted by samarium (Sm) element, that is, the atomic ratio of Sm on the A side is 25.6% to 42%, so as to solve the problem of shortened cycle life caused by the small amount of cobalt (Co) atoms. The equilibrium pressure is adjusted by the change in the ratio of Sm to La and Ce to satisfy the requirements of the charge and discharge dynamic performance of the electrode material. The nucleation rate of the solidification process is improved by the addition of zirconium (Zr) to the A side at an atomic ratio of 2% to 3%. The Ni-MH battery negative-electrode material obtained from the hydrogen storage alloy has high overcharge resistance, and good high-rate discharge performance and cycle stability.
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2.发明申请公开(公告)号：US20210039947A1
公开(公告)日：2021-02-11
申请号：US16977705
申请日：2019-09-19
Applicant: South China University of Technology
Inventor： Liuzhang Ouyang , Kang Chen , Hui Wang , Jiangwen Liu , Min Zhu
IPC: C01B6/17
Abstract: A method for preparing lithium borohydride by means of room temperature solid phase ball milling, comprising the following steps: uniformly mixing a magnesium-containing reducing agent and a lithium metaborate-containing reducing material under a non-oxidizing atmosphere at room temperature, performing solid phase ball milling, isolating and purifying to obtain lithium borohydride. The method has the advantages of having a simple process, having a controllable and adjustable reaction procedure, having mild reaction conditions, energy consumption being low, costs being low, and output being high, while creating no pollution, being safe and cyclically using boron resources, having important practical significance.
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3.发明授权公开(公告)号：US11420870B2
公开(公告)日：2022-08-23
申请号：US16332391
申请日：2016-12-13
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Liuzhang Ouyang , Hao Zhong , Wei Chen , Hui Wang , Jiangwen Liu , Min Zhu
Abstract: The present invention discloses a method for directly synthesizing sodium borohydride by solid-state ball milling at room temperature, which comprises: performing solid-state ball milling on a mixture of a reducing agent and a reduced material by using a ball mill under room temperature, and performing purification to obtain sodium borohydride. The reducing agent comprises one or more of magnesium, magnesium hydride, aluminum, calcium, and magnesium silicide. The reduced material is sodium metaborate containing crystallization water or sodium metaborate, or is a mixture of sodium metaborate containing crystallization water and sodium metaborate. The solid-state milling is performed in a mixed atmosphere of argon and hydrogen, or an argon atmosphere, or a hydrogen atmosphere. The present invention has a simple process, a controllable and adjustable reaction procedure, mild reaction conditions, low energy consumption, low costs, high yield, no pollution, good safety, and easy industrial production.
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4.发明申请公开(公告)号：US20170348699A1
公开(公告)日：2017-12-07
申请号：US15539360
申请日：2014-12-24
Applicant: South China University of Technology
Inventor： Min Zhu , Meiqin Zeng , Zhongchen Lu , Liuzhang Ouyang , Hui Wang , Renzong Hu
Abstract: The present invention provides an application method for cold field plasma discharge assisted high energy ball milled powder and a plasma assisted high energy ball milling device using the method for cold field plasma high energy ball milled powder. The present invention generates plasma by using dielectric barrier discharge and introducing a dielectric barrier discharge electrode bar into a high-speed vibrating ball milling tank, which requires that, on one hand, a solid insulation medium on the outer layer of the electrode bar can simultaneously bear high-voltage discharge and mechanical shock failure of the grinding ball, and on the other hand, the high-speed vibrating ball milling device can uniformly process the powder. Based on the ordinary ball milling technology, the discharge space pressure is set to a non-thermal equilibrium discharge state with a pressure of about 102 to 106 Pa, discharge plasmas are introduced to input another kind of effective energy to the processed powder, so as to accelerate refinement of the powder to be processed and promote the alloying process under the combined action of the mechanical stress effect and the thermal effect of the external electric field, thereby greatly improving the processing efficiency and the effect of the ball mill.
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公开(公告)号：US09764951B2
公开(公告)日：2017-09-19
申请号：US14917142
申请日：2013-12-20
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Min Zhu , Huaijun Lin , Liuzhang Ouyang , Hui Wang , Jiangwen Liu , Weihua Wang , Deqian Zhao
CPC classification number: C01B3/0057 , B22F9/008 , B22F9/04 , B22F2301/058 , B22F2301/45 , C01B3/0031 , C01B3/0078 , C21D2201/03 , C22C1/002 , C22C23/00 , C22C23/06 , C22C45/00 , C22C45/005 , C22F1/06 , Y02E60/327
Abstract: A method for preparing a magnesium-based hydrogen storage material, includes: a Mg—Ce—Ni family amorphous alloy is prepared by a rapid cooling process; the amorphous alloy is pulverized, so as to obtain a amorphous powder; the amorphous alloy is activated, so as to obtain a MgH2—Mg2NiH4—CeH2.73 family nanocrystalline composite; the abovementioned composite is carried out a hydrogen absorption and desorption cycle, then the composite is placed in a pure Ar atmosphere for passivation, finally, the passivated composite is oxidized, so as to obtain a MgH2—Mg2NiH4—CeH2.73—CeO2 family nanocrystalline composite.
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Patent Agency Ranking
公开(公告)号：US10758916B2
公开(公告)日：2020-09-01
申请号：US15539360
申请日：2014-12-24
Applicant: South China University of Technology
Inventor： Min Zhu , Meiqin Zeng , Zhongchen Lu , Liuzhang Ouyang , Hui Wang , Renzong Hu
Abstract: Generating plasma by using dielectric barrier discharge and introducing a dielectric barrier discharge electrode bar into a high-speed vibrating ball milling tank requires that, on one hand, a solid insulation medium on the outer layer of the electrode bar can simultaneously bear high-voltage discharge and mechanical shock failure of the grinding ball, and on the other hand, the high-speed vibrating ball milling device can uniformly process the powder. The discharge space pressure is set to a non-thermal equilibrium discharge state with a pressure of about 102 to 106 Pa, discharge plasmas are introduced to input another kind of effective energy to the processed powder, so as to accelerate refinement of the powder to be processed and promote the alloying process and improve the processing efficiency and the effect of the ball mill.
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7.发明授权公开(公告)号：US11807540B2
公开(公告)日：2023-11-07
申请号：US16977705
申请日：2018-10-30
Applicant: South China University of Technology
Inventor： Liuzhang Ouyang , Kang Chen , Hui Wang , Jiangwen Liu , Min Zhu
IPC: C01B6/17
CPC classification number: C01B6/17 , C01P2002/74 , C01P2002/82 , C01P2006/80
Abstract: A method for preparing lithium borohydride by means of room temperature solid phase ball milling, comprising the following steps: uniformly mixing a magnesium-containing reducing agent and a lithium metaborate-containing reducing material under a non-oxidizing atmosphere at room temperature, performing solid phase ball milling, isolating and purifying to obtain lithium borohydride. The method has the advantages of having a simple process, having a controllable and adjustable reaction procedure, having mild reaction conditions, energy consumption being low, costs being low, and output being high, while creating no pollution, being safe and cyclically using boron resources, having important practical significance.
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公开(公告)号：US20220006070A1
公开(公告)日：2022-01-06
申请号：US17286614
申请日：2019-05-28
Applicant: South China University of Technology , Sihui Dabowen Industrial Co., Ltd. , Guangdong Research Institute of Rare-Metal
Inventor： Liuzhang Ouyang , Cheng Tan , Min Zhu , De Min , Hui Wang , Tongzhao Luo , Fangming Xiao , Renheng Tang
Abstract: The present invention relates to a hydrogen storage alloy, an electrode for a Ni-MH battery, a secondary battery, and a method for preparing the hydrogen storage alloy. The chemical composition of the hydrogen storage alloy is expressed by the general formula La(3.0˜3.2)xCexZrySm(1−(4.11˜4.2)x−y)NizCouMnvAlw, where x, y, z, u, v, w are molar ratios, and 0.14≤x≤0.17, 0.02≤y≤0.03, 4.60≤z+u+v+w≤5.33, 0.10≤u≤0.20, 0.25≤v≤0.30, and 0.30≤w≤0.40. The atomic ratio of the metal lanthanum (La) to the metal cerium (Ce) is fixed at 3.0 to 3.2, which satisfies the requirements of the overcharge performance of the electrode material. A side elements are largely substituted by samarium (Sin) element, that is, the atomic ratio of Sin on the A side is 25.6% to 42%, so as to solve the problem of shortened cycle life caused by the small amount of cobalt (Co) atoms. The equilibrium pressure is adjusted by the change in the ratio of Sin to La and Ce to satisfy the requirements of the charge and discharge dynamic performance of the electrode material. The nucleation rate of the solidification process is improved by the addition of zirconium (Zr) to the A side at an atomic ratio of 2% to 3%. The Ni-MH battery negative-electrode material obtained from the hydrogen storage alloy has high overcharge resistance, and good high-rate discharge performance and cycle stability.
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9.发明申请公开(公告)号：US20210284531A1
公开(公告)日：2021-09-16
申请号：US16332391
申请日：2016-12-13
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Liuzhang Ouyang , Hao Zhong , Wei Chen , Hui Wang , Jiangwen Liu , Min Zhu
IPC: C01B6/21
Abstract: The present invention discloses a method for directly synthesizing sodium borohydride by solid-state ball milling at room temperature, which comprises: performing solid-state ball milling on a mixture of a reducing agent and a reduced material by using a ball mill under room temperature, and performing purification to obtain sodium borohydride. The reducing agent comprises one or more of magnesium, magnesium hydride, aluminum, calcium, and magnesium silicide. The reduced material is sodium metaborate containing crystallization water or sodium metaborate, or is a mixture of sodium metaborate containing crystallization water and sodium metaborate. The solid-state milling is performed in a mixed atmosphere of argon and hydrogen, or an argon atmosphere, or a hydrogen atmosphere. The present invention has a simple process, a controllable and adjustable reaction procedure, mild reaction conditions, low energy consumption, low costs, high yield, no pollution, good safety, and easy industrial production.
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公开(公告)号：US10202279B2
公开(公告)日：2019-02-12
申请号：US15541395
申请日：2015-12-29
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Liuzhang Ouyang , Ruoming Duan , Hui Wang , Jiangwen Liu , Min Zhu
IPC: B22F9/02 , B22F9/04 , B22F9/08 , C01B3/00 , C01B3/06 , C01B6/24 , C22C1/02 , C22C1/04 , B01J20/04 , B01J20/30
Abstract: Provided are a CaMg2-based alloy hydride material for hydrolysis production of hydrogen, a preparation method therefor and a use thereof. The material has a general formula of CaMgxMyHz, wherein M is Ni, Co or Fe, 1.5≤x
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