Petrochina Company Limited

China Mobile Communications Corporation

Xiaoqi Wang

Jianming Li

Xu Jin

Xiaodan Liu

Liang Sun

He H Liu

Hang Jiao

Guang Yang

Ling Su

He Liu

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.

Preparation method of a nanotube hierarchically structured lithium titanate and use and product thereof

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.

Process for preparing titanic acid salt, titanic acid, and titanium oxide having controllable particle size and hierarchical structure

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.

Nanostructured titanic acid salts and preparation process and use thereof

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.

Linear porous lithium titanate material, preparation and product thereof

The present application provides a method for characterizing reservoir micro pore structures, in particular structures smaller than 50 nm and a system therefore. The method can include fabricating a reservoir sheet; fabricating a reservoir sheet electrode using the reservoir sheet; depositing crystal substance in inner pores of the reservoir sheet of the reservoir sheet electrode using chemical deposition; obtaining the crystal substance by removing rock portions of the reservoir sheet in which the crystal substance is deposited; and scanning the shapes of the obtained crystal substance, the result of the scanning being the reservoir micro pore structure.

Characterization method for a reservoir micro pore structure and a system thereof

An MBMS service-based method for transmitting resource scheduling information is provided. The method includes: before transmitting MBMS information, determining information on a repetition period with which a local cell transmits the MBMS information; and determining repetition periods with which respective neighboring cells that carrying the MBMS information transmit the MBMS information; transmitting an identifier of the local cell and an identifier of the neighboring cell, as well as the determined on the repetition periods, to a terminal of the local cell. Thus the terminal can perform chip combining in divided time periods on the MBMS information of corresponding neighboring cells.

Method and apparatus for transmitting and receiving resource scheduling information and scheduling resources

The present invention discloses a method for transmitting the configuration mode of MBMS carrier frequency time slots, and a method for receiving the configuration mode of MBMS carrier frequency time slots. The present invention also discloses a RNC and a terminal. The present invention enables the terminal to ascertain the configuration mode of MBMS carrier frequency time slots, and performs appropriate combining operation on the basis of the capability of the terminal itself, hence reduces the workload on the terminal.

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Beijing, China

Xiaoqi Wang