Preparation of lithium ion battery taking graphene loaded nano titanium dioxide as cathode material

A nano-titanium dioxide, lithium-ion battery technology, applied in secondary batteries, electrolyte battery manufacturing, nanotechnology and other directions, can solve serious problems, particle agglomeration, difficult product quality control and other problems, achieve high hydrogen overpotential, eliminate hydrogen generation, The effect of safe and reliable high-energy power battery

Inactive Publication Date: 2017-05-31
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the TiO prepared by this method 2 A serious disadvantage is that the agglo...

Method used

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  • Preparation of lithium ion battery taking graphene loaded nano titanium dioxide as cathode material
  • Preparation of lithium ion battery taking graphene loaded nano titanium dioxide as cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Example 1: Preparation of NaCl-KCl eutectic salt

[0058] Add NaCl (45g) and KCl (55g) into a ball mill jar, mill at a speed of 700rpm for 1 hour, take it out and put it in a crucible, heat it in air at 700°C for 2 hours, and cool it to 25°C to obtain NaCl-KCl eutectic salt.

Embodiment 2

[0059] Example 2: Preparation of carbon-supported nano-boron-lithium alloy

[0060] Take glucose monohydrate (4g), add glucose monohydrate, urea and lithium metaborate in a ball mill tank at a mass ratio of 4:2:1, and ball mill at a speed of 700rpm for 2 hours to prepare a carbon-supported nano boron-lithium alloy precursor ;

[0061] After heating to 110°C for 2 hours under a nitrogen atmosphere, vacuumize and heat to 440°C for 8 hours, then heat to 900°C for 2 hours, and the heating rate for three times is 10°C / min; cool to room temperature to obtain carbon Nano boron-lithium alloy loaded.

Embodiment 3

[0062] Embodiment three: the preparation of negative electrode

[0063] Get the Nafion solution (1g) of the carbon-loaded nano boron-lithium alloy (0.85g), acetylene black (0.1g) and commercially available mass content 5wt% that make in embodiment two, the graphene is loaded with nano-boron-lithium alloy, Acetylene black and Nafion solution are mixed and ground according to the mass ratio of 85:10:100, prepared into a paste and then applied to commercially available nickel foam; 2 Press molding under a certain pressure to obtain a negative electrode.

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Abstract

The invention relates to a lithium ion battery preparation technology, and aims to provide a preparation method of a lithium ion battery taking graphene loaded nano titanium dioxide as a cathode material. The preparation method comprises the following steps: carrying out ball grinding mixing on glucose monohydrate, urea and lithium metaborate, then heating the mixture for three times, and cooling the mixture to room temperature; mixing and grinding an obtained carbon-loaded nano boron lithium alloy with acetylene black and a Nafion solution, blending the materials to prepare paste, and coating nickel foam with the paste; drying the nickel foam in shade, and pressing the nickel foam for molding, thus obtaining an anode; arraying a cathode, a membrane and the anode in order to form a battery structure, wherein electrolyte takes LiPF6 as a solute and takes a mixture of ethylene carbonate, methyl carbonate and dimethyl carbonate as a solvent, and the electrolyte contains lithium hexafluorophate. The preparation method has the advantages of high chemical stability and extremely high hydrogen overpotential; the possibility of hydrogen generation is completely eliminated; a high-capacity safe lithium ion battery is prepared. The open circuit voltage of the lithium ion battery is 1.8V, and the hydrogen generation during charging can be effectively suppressed; a safe and reliable high-energy power battery is provided for an electric automobile.

Description

technical field [0001] The present invention relates to a preparation method of a lithium ion battery, more specifically, the present invention relates to ball milling and mixing glucose, melamine, tetrabutyl titanate and NaCl-KCl eutectic salt, and after calcination, the salt content is washed with water to obtain Graphene supported nano-TiO 2 As a cathode material for an aqueous electrolyte lithium-ion battery; mix glucose, melamine and lithium metaborate by ball milling, and after calcination, obtain carbon-supported nano-boron-lithium as a negative-electrode material for lithium-ion batteries, and use graphene-supported nano-TiO 2 The invention relates to a method for preparing a lithium-ion battery in which the carbon-supported boron-lithium alloy is used as the positive electrode material and the negative electrode material is used. Background technique [0002] Lithium-ion batteries have the advantages of light weight, large capacity, and no memory effect, so they ha...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/62H01M10/058H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/48H01M4/625H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 李睿李洲鹏刘宾虹
Owner ZHEJIANG UNIV
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