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A kind of preparation method and application of copper-doped zinc lithium titanate nanoparticles

A technology of lithium zinc titanate and nanoparticles, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as poor lithium intercalation performance, achieve low cost, and improve lithium intercalation performance. Poor, easy-to-operate effect

Inactive Publication Date: 2018-07-20
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of preparation method and application of copper-doped zinc lithium titanate nanoparticle, it is by doping copper to Li 2 ZnTi 3 o 8 After modification, the obtained copper-doped lithium zinc titanate nanoparticles can be used as anode materials for lithium-ion batteries to effectively improve the existing Li 2 ZnTi 3 o 8 The problem of poor lithium intercalation performance of materials

Method used

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  • A kind of preparation method and application of copper-doped zinc lithium titanate nanoparticles
  • A kind of preparation method and application of copper-doped zinc lithium titanate nanoparticles
  • A kind of preparation method and application of copper-doped zinc lithium titanate nanoparticles

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Embodiment 1

[0020] 1) Dissolve 280 mg titanium isopropoxide in 570 mg citric acid to obtain titanium citrate solution;

[0021] 2) Control the temperature of the titanium citrate solution to 60 °C in a water bath, and then dissolve 25 mg lithium carbonate, 90 mg zinc nitrate hexahydrate and 3 mg copper nitrate trihydrate one by one;

[0022] 3) Add ethanol to the solution obtained in step 2) according to the weight ratio of ethanol to citric acid as 2:3, then raise the temperature of the solution to 80 °C, and take it out after reaching the sol state;

[0023] 4) Put the sol obtained in step 3) into a crucible, heat-treat at 350 °C for 1 h, then grind it into a powder state with an agate mortar, put it in a muffle furnace, and calcinate at 600 °C for 3 h to obtain copper-doped Lithium zinc titanate nanoparticles.

Embodiment 2

[0025] 1) Dissolve 300 mg titanium isopropoxide in 600 mg citric acid to obtain titanium citrate solution;

[0026] 2) Control the temperature of the titanium citrate solution to 75 °C in a water bath, and then dissolve 28 mg lithium carbonate, 110 mg zinc nitrate hexahydrate and 6 mg copper nitrate trihydrate one by one;

[0027] 3) Add ethanol to the solution obtained in step 2) according to the weight ratio of ethanol to citric acid as 2:3, then raise the temperature of the solution to 100 °C, and take it out after reaching the sol state;

[0028] 4) Put the sol obtained in step 3) into a crucible, heat-treat at 500 °C for 1 h, then grind it into a powder state with an agate mortar, put it in a muffle furnace, and calcinate it at 800 °C for 3 h to obtain copper doped Lithium zinc titanate nanoparticles.

Embodiment 3

[0030] 1) Dissolve 290 mg titanium isopropoxide in 580 mg citric acid to obtain titanium citrate solution;

[0031] 2) Control the temperature of the titanium citrate solution to 70 °C in a water bath, and then dissolve 26 mg lithium carbonate, 100 mg zinc nitrate hexahydrate and 4 mg copper nitrate trihydrate one by one;

[0032] 3) Add ethanol to the solution obtained in step 2) according to the weight ratio of ethanol to citric acid as 2:3, then raise the temperature of the solution to 90 °C, and take it out after reaching the sol state;

[0033] 4) Put the sol obtained in step 3) into a crucible, heat-treat at 400 °C for 1 h, then grind it into a powder state with an agate mortar, put it in a muffle furnace, and calcinate at 700 °C for 3 h to obtain copper doped Lithium zinc titanate nanoparticles.

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Abstract

The invention discloses a preparation method for copper-doped lithium zinc titanate nano particles and an application thereof, and belongs to the technical field of battery materials. The preparation method comprises the following steps: mixing isopropyl titanate with citric acid to generate titanium citrate, adding and dissolving lithium carbonate, zinc nitrate hexahydrate and copper nitrate hydrate, adding ethanol, heating up to a sol state, carrying out a heat treatment in a crucible, grinding and calcining at a high temperature to prepare the copper-doped lithium zinc titanate nano particles, wherein the purity of the copper-doped lithium zinc titanate nano particles can be higher than 90%. The nano particles are prepared into a lithium ion battery cathode material to effectively perfect the problem of poor lithium embedding performance of the existing Li2ZnTi3O8 material, and thus the copper-doped lithium zinc titanate nano particles have a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of battery materials, and in particular relates to a preparation method and application of copper-doped zinc lithium titanate nanoparticles. Background technique [0002] Lithium-ion batteries have significant advantages such as high voltage, high capacity, and long cycle life. They have been widely used in mobile electronic equipment, defense industry, electric vehicles and other fields. Electrode materials are the core part of lithium-ion batteries and the key factors that determine the performance of lithium-ion batteries. Graphite is currently the anode material widely used in commercial Li-ion batteries. However, the lithium intercalation potential of graphite is close to that of metal lithium, and lithium dendrites are easily formed on the surface during charging and discharging, which will cause short circuit of the battery, and there are certain safety hazards. [0003] Titanium-based (titanium oxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/58H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/364H01M4/485H01M4/5825H01M4/626H01M10/0525Y02E60/10
Inventor 洪振生周凯强真义超黄志高
Owner FUJIAN NORMAL UNIV
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