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Boron-doped submicron spherical tio2 electrode material and its preparation method and application in lithium-ion batteries

An electrode material, sub-micron technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as affecting applications and poor conductivity

Active Publication Date: 2016-05-18
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] On the other hand, titanium dioxide has poor conductivity due to its wide bandgap semiconductor, which seriously affects its application in the field of lithium-ion batteries.

Method used

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  • Boron-doped submicron spherical tio2 electrode material and its preparation method and application in lithium-ion batteries
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  • Boron-doped submicron spherical tio2 electrode material and its preparation method and application in lithium-ion batteries

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preparation example Construction

[0056] (2) In the preparation method of the electrode material of the present invention, the source of raw materials is extensive, the technological process is simple, no complicated equipment is needed, the cost is low, and it is suitable for large-scale production.

[0057] (3) The electrode material of the present invention can be applied to the preparation of electrode materials for lithium ion batteries and other energy storage electrode materials.

Embodiment 1

[0067] Slowly add 4ml of chemically pure titanium tetrachloride into 12ml of absolute ethanol dropwise, stir evenly with a magnetic force, pour into a spherical reaction vessel containing 100ml of deionized aqueous solution containing 0.5g of boric acid, and stir the reaction at 60°C The reaction was carried out in a container for 12 hours, and the precipitate was obtained by filtration. The precipitate was washed 2 to 3 times with distilled water to obtain boron-doped submicron spherical structure TiO 2 The precursor was calcined at 500°C (increased to 500°C at a rate of 5°C / min) for 5 hours in an air atmosphere to obtain boron-doped submicron sphere TiO 2 .

Embodiment 2

[0069] Slowly add 5ml of chemically pure titanium trichloride into 20ml of absolute ethanol dropwise, stir evenly with a magnetic force, pour it into a spherical reaction vessel containing 100ml of deionized aqueous solution containing 1g of boric acid, and stir the reactor at 70°C The reaction was carried out for 8 hours, and the precipitate was obtained by filtration. The precipitate was washed 2 to 3 times with distilled water to obtain boron-doped submicron spherical structure TiO 2 The precursor; the precursor was calcined at 600°C (increasing the temperature to 600°C at a rate of 10°C / min) for 8 hours to obtain boron-doped submicron sphere TiO 2 .

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Abstract

The invention relates to a boron doped submicron-sphere TiO2 electrode material as well as a preparation method and application thereof in a lithium ion battery thereof, and particularly discloses a boron doped TiO2 electrode material, wherein the electrode material is the TiO2 submicron-sphere electrode material; the submicron-sphere consists of rutile-type TiO2 nanoparticles, and has the size of 300-1000nm; the particle diameters of the nano particles are 10-60nm. According to the total mole ratio of the electrode material, the mole percentage composition of the boron element is 0.1-10%. The electrode material disclosed by the invention has excellent electrical conductivity and rate performance. Besides, the invention also discloses the preparation method and application of the electrode material.

Description

technical field [0001] The invention relates to the field of battery materials, in particular to a boron-doped submicron spherical TiO 2 Electrode materials and their preparation methods and applications in lithium-ion batteries. Background technique [0002] In recent years, spinel lithium titanate and TiO 2 Titanium-based negative electrode materials have become a hot spot in the research of lithium-ion battery electrode materials. Spinel lithium titanate has attracted more and more attention as an anode material for lithium ions because of its excellent safety performance, simple preparation process, cheap raw materials and no pollution. Li 4 Ti 5 o 12 with Li / Li + The potential between the reference electrodes is 1.55V, and its relatively high potential fundamentally avoids the unsafety of carbon electrodes. At the same time, Li 4 Ti 5 o 12 As a negative electrode material for lithium-ion batteries, during charging and discharging, the intercalation and deinter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M4/62
CPCH01M4/48H01M4/62H01M10/0525Y02E60/10
Inventor 田华军韩伟强
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI