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公开(公告)号：US20200071183A1
公开(公告)日：2020-03-05
申请号：US16554862
申请日：2019-08-29
Applicant: PetroChina Company Limited
Inventor： Xu Jin , Jianming Li , Xiaoqi Wang , Hang Jiao , Liang Sun , Xiaodan Liu
Abstract: The present invention provides a nanostructured titanic acid salt and a preparation process and use thereof. The process comprises preparing a dispersion containing titanium peroxy complex; slowly adding a metal compound to the dispersion containing the titanium peroxy complex to form a solution; adding an alcohol to the solution under normal temperature and normal pressure to produce the nanostructured titanic acid salt precursor precipitate in the solution, and separating the precipitate to obtain the titanic acid salt precursor; drying the precursor, and then heat treating it to obtain the nanostructured titanic acid salt product. The present invention provides a process for preparing a titanic acid salt with simple preparation process, easy control for process parameters and easy large-scale industrial production.
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公开(公告)号：US11858827B2
公开(公告)日：2024-01-02
申请号：US16556224
申请日：2019-08-29
Applicant: PETROCHINA COMPANY LIMITED
Inventor： Xu Jin , Jianming Li , He Liu , Hang Jiao , Xiaoqi Wang , Liang Sun , Xiaodan Liu
CPC classification number: C01G23/005 , C01D15/00 , C01G23/001 , B82Y30/00 , B82Y40/00
Abstract: A preparation method of a nanotube hierarchically structured lithium titanate includes the steps of: S1. dispersing a titanium source into an aqueous solution containing lithium hydroxide and hydrogen peroxide and stirring to obtain a mixed solution; S2. subjecting the mixed solution obtained in step S1 to a reaction by heating to obtain a precursor having a nanowire-like structure; S3. subjecting the precursor having a nanowire-like structure obtained in step S2 to separation and drying; S4. subjecting the precursor having a nanowire-like structure after separation and drying to a low-temperature annealing treatment; S5. subjecting the precursor having a nanowire-like structure after the low-temperature annealing treatment to a liquid thermal reaction to obtain the nanotube hierarchically structured lithium titanate. The method includes a simple process and easily controllable process parameters, and may be easily scaled-up for industrial production.
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Patent Agency Ranking
公开(公告)号：US11565944B2
公开(公告)日：2023-01-31
申请号：US16556211
申请日：2019-08-29
Applicant: PETROCHINA COMPANY LIMITED
Inventor： Jianming Li , Xu Jin , He Liu , Xiaodan Liu , Xiaoqi Wang , Liang Sun
Abstract: A process for preparing a titanic acid salt, titanic acid, and titanium oxide having a controllable particle size and a hierarchical structure, wherein the process includes the steps of: preparing a titanium-containing peroxo-complex solution; adding a basic metal compound to the titanium-containing peroxo-complex solution to form a mixture solution; adding one of polyvinyl alcohol, hydroxypropyl methyl cellulose, and polyethylene glycol to the mixture solution to form a precursor dispersion; and subjecting the precursor dispersion to a solvothermal reaction to obtain the titanic acid salt having a hierarchical structure. The process for preparing a titanic acid salt, titanic acid, and titanium oxide having a controllable particle size and a hierarchical structure, can not only realize the regulation of morphology and particle diameter of constituent units in the hierarchical structure, but also can achieve the regulation of particle size in the hierarchical structure.
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公开(公告)号：US20200075944A1
公开(公告)日：2020-03-05
申请号：US16556449
申请日：2019-08-30
Applicant: PetroChina Company Limited
Inventor： Jianming Li , Xu Jin , He Liu , Xiaoqi Wang , Xiaodan Liu , Hang Jiao
IPC: H01M4/485 , H01M10/0525 , C01G23/00
Abstract: The present invention provides a linear porous lithium titanate material, preparation and product thereof. The material comprises a lithium titanate material having a crystal phase which is a spinel type, wherein the lithium titanate material has a linear structure having an aspect ratio of greater than 10, and the linear lithium titanate material has a porous structure; wherein the linear porous lithium titanate material has a structure composed of a plurality of particles having an oriented growth direction. The material has a long-axis structure which facilitates the effective migration of electrons, a porous structure which facilitates the rapid intercalation and deintercalation process of lithium ions, sodium ions or potassium ions, and a large specific surface area which facilitates the contact area between the electrolyte solution and the electrodes and reduces the current density, thus is excellent in a rapid charge-discharge performance of the battery.
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公开(公告)号：US11387452B2
公开(公告)日：2022-07-12
申请号：US16556449
申请日：2019-08-30
Applicant: PetroChina Company Limited
Inventor： Jianming Li , Xu Jin , He Liu , Xiaoqi Wang , Xiaodan Liu , Hang Jiao
IPC: C01G23/00 , H01M4/485 , H01M10/0525 , H01M4/02
Abstract: The present invention provides a linear porous lithium titanate material, preparation and product thereof. The material comprises a lithium titanate material having a crystal phase which is a spinel type, wherein the lithium titanate material has a linear structure having an aspect ratio of greater than 10, and the linear lithium titanate material has a porous structure; wherein the linear porous lithium titanate material has a structure composed of a plurality of particles having an oriented growth direction. The material has a long-axis structure which facilitates the effective migration of electrons, a porous structure which facilitates the rapid intercalation and deintercalation process of lithium ions, sodium ions or potassium ions, and a large specific surface area which facilitates the contact area between the electrolyte solution and the electrodes and reduces the current density, thus is excellent in a rapid charge-discharge performance of the battery.
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公开(公告)号：US11554966B2
公开(公告)日：2023-01-17
申请号：US16554862
申请日：2019-08-29
Applicant: PetroChina Company Limited
Inventor： Xu Jin , Jianming Li , Xiaoqi Wang , Hang Jiao , Liang Sun , Xiaodan Liu
Abstract: The present invention provides a nanostructured titanic acid salt and a preparation process and use thereof. The process comprises preparing a dispersion containing titanium peroxy complex; slowly adding a metal compound to the dispersion containing the titanium peroxy complex to form a solution; adding an alcohol to the solution under normal temperature and normal pressure to produce the nanostructured titanic acid salt precursor precipitate in the solution, and separating the precipitate to obtain the titanic acid salt precursor; drying the precursor, and then heat treating it to obtain the nanostructured titanic acid salt product. The present invention provides a process for preparing a titanic acid salt with simple preparation process, easy control for process parameters and easy large-scale industrial production.
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公开(公告)号：US20200071186A1
公开(公告)日：2020-03-05
申请号：US16555147
申请日：2019-08-29
Applicant: PetroChina Company Limited
Inventor： Jianming Li , Xu Jin , Xiaoqi Wang , Xiaodan Liu , Hang Jiao , Liang Sun , Ling Su
Abstract: The present invention provides a linear porous titanium dioxide material and the preparation and products thereof. The linear porous titanium dioxide material has an anatase phase structure and a single crystal structure, and the structure of the linear porous titanium dioxide material is composed of a plurality of particles having an oriented growth direction. The invention also provides a method of preparing the above material and the use thereof. The long axis of structure of the titanium dioxide porous nanowire of the present invention facilitates effective electron migration.
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