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Lithium ion battery negative electrode material Li2ZnTi3O8 preparation method

A technology for lithium ion batteries and negative electrode materials, which is applied in battery electrodes, nanotechnology for materials and surface science, secondary batteries, etc. Inexpensive, time- and energy-saving, resource-rich effects

Inactive Publication Date: 2015-05-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to use the molten salt method to synthesize lithium ion negative electrode material zinc lithium titanate to overcome the disadvantages of high temperature, long reaction time and high organic material cost and toxicity in the current preparation method of zinc lithium titanate material. disadvantages such as the high temperature environment required when

Method used

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  • Lithium ion battery negative electrode material Li2ZnTi3O8 preparation method

Examples

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Embodiment 1

[0026] Titanium dioxide (TiO 2 ), lithium carbonate (Li 2 CO 3 ), zinc acetate (Zn(CH 3 COO) 2 2H 2 O), the molten salt is prepared according to the molar ratio of 3:1:1:4, the molten salt is a mixture of NaCl and KCl, and the molar ratio of the two is 1:1;

[0027] Put it in a high-energy ball mill tank (15 large balls and 30 small balls), add ethanol, the molar ratio of titanium dioxide to ethanol is = 1:30, and mill at 400r / min for 4 hours. Take it out, dry it in blast drying at 80 degrees Celsius for 24 hours, grind it and calcinate it in a muffle furnace at 800 degrees Celsius for 3 hours, wash it with deionized water three times after natural cooling, centrifuge, dry it, and grind it to obtain a lithium-ion battery Negative electrode material lithium zinc titanate.

[0028] The active material lithium zinc titanate, conductive agent (Super P), and binder (PVDF) were mixed in a mass ratio of 80:10:10, and coated on a copper sheet with a film applicator to form a 16u...

Embodiment 2

[0030] Titanium dioxide (TiO 2 ), lithium carbonate (Li 2 CO 3 ), zinc acetate (Zn(CH 3 COO) 2 2H 2 O), the molten salt is prepared according to the molar ratio of 3:1:1:3, and other process parameters are the same as in Example 1.

Embodiment 3

[0032] Titanium dioxide (TiO 2 ), lithium carbonate (Li 2 CO 3 ), zinc acetate (Zn(CH 3 COO) 2 2H 2 O), the molten salt is prepared according to the molar ratio of 3:1:1:2, and other process parameters are the same as in Example 1.

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Abstract

The invention relates to a lithium ion battery electrode material Li2ZnTi3O8 preparation method, and aims at the defects of high temperature, longer reaction time, high organic material cost, toxicity and the like of lithium zinc titanate material preparation method in the prior art. The technical scheme is as follows: titanium dioxide (TiO2), lithium carbonate (Li2CO3) and zinc acetate (Zn (CH3COO) 2.2H2O) and mixed molten salt sodium chloride (NaCl) and potassium chloride (KCl) are mixed and stirred, in the high temperature sintering process, reactant precursors can be sufficiently contacted and reacted in liquid environment facilitating molten salts, prepared nanoscale particular material is uniform in size and free of obvious agglomeration, accumulation holes are among particles, and the structural features is conducive to play the electrochemical properties of the material.

Description

Technical field: [0001] The invention relates to a preparation method of a lithium ion battery negative electrode material, that is, a method for synthesizing lithium ion negative electrode material zinc lithium titanate by a molten salt method. Background technique: [0002] With the continuous development of consumer electronics and the development of zero-emission electric vehicles, the requirements for lithium-ion batteries are getting higher and higher, especially for discharge capacity and service life. Compared with traditional batteries, lithium-ion batteries have the advantages of high voltage platform, high specific capacity, long cycle life, low self-discharge and no memory effect. At present, graphite is mostly used as anode material for commercialized lithium-ion batteries, which will lead to the growth of dendrite lithium, which will pierce the separator and cause safety problems. Therefore, finding alternative safe and high-capacity anode materials has become...

Claims

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Application Information

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IPC IPC(8): H01M4/485C01G23/00
CPCB82Y30/00C01G23/005H01M4/485H01M10/0525Y02E60/10
Inventor 唐致远唐好庆
Owner TIANJIN UNIV
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