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Water-solution lithium ion battery negative pole material and preparation method thereof

A technology for lithium-ion batteries and negative electrode materials, applied in electrode manufacturing, battery electrodes, secondary batteries, etc., can solve problems such as capacity drop and poor battery cycle performance, achieve great application potential, and easy control of microscopic shape and size , good charging and discharging stability

Inactive Publication Date: 2013-05-15
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently reported anode materials for aqueous lithium-ion batteries mainly include manganese oxides, vanadium oxides, phosphates, etc., but the battery cycle performance using these anode materials is not good, and the capacity generally decreases after charging and discharging 25 to 40 times. A sharp decline

Method used

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  • Water-solution lithium ion battery negative pole material and preparation method thereof
  • Water-solution lithium ion battery negative pole material and preparation method thereof
  • Water-solution lithium ion battery negative pole material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Tetrabutyl titanate (Ti(OC 4 h 9 ) 4 ) was dissolved in toluene to prepare a solution with a concentration of 10 wt%, and this solution was mixed with 0.1 mol / L TiCl 4 The toluene solution was mixed at a volume ratio of 3:1, mixed evenly and transferred to a hydrothermal reaction kettle, and 0.1 mol / L hydrochloric acid aqueous solution 8mL was added dropwise under stirring conditions to make it hydrolyze. Add the FTO glass substrate to the solution 5 minutes after the hydrolysis reaction occurs. Before putting the FTO substrate into the solution, it is ultrasonically cleaned with acetone for 10 minutes, then immersed in 1mol / L NaOH solution for 15 minutes, and finally washed three times alternately with ethanol and water, and baked. Dry. Transfer the hydrolysis reaction solution containing the matrix into a sealed hydrothermal reaction kettle, place it in a muffle furnace and raise the temperature to 200°C at a rate of 5°C / min for 4 hours to obtain a titanium dioxide...

Embodiment 2

[0029] Under strong stirring conditions, add tetrabutyl titanate (0.5 mL) into ethylene glycol (20 mL) and mix well, then add 0.1 mol / L citric acid solution 12 mL dropwise under stirring conditions, and stir until transparent , to obtain the precursor solution. Then the precursor solution was poured into 80 mL of ethanol, stirred at room temperature for 10 min, and then allowed to stand for 2 h. The resulting solution was transferred to a reaction kettle, and a titanium sheet was placed as a substrate. The titanium sheet was ultrasonically cleaned with acetone for 20 minutes before being put in, then soaked in 1mol / L NaOH solution for 25 minutes, washed with ethanol and water alternately, and dried for later use. Adjust the temperature of the reactor to 250 °C and keep it warm for 0.5 h to obtain a thin film material with nanocone array titanium dioxide coated on the substrate. The charge-discharge curve diagram of the obtained titanium dioxide negative electrode material is ...

Embodiment 3

[0031] Tetrabutyl titanate (Ti(OC 4 h 9 ) 4 ) was dissolved in ethanol to prepare 50 mL of a solution with a concentration of 5 wt%. This solution was mixed with 0.1 M titanium tetrachloride ethanol solution at a volume ratio of 4:1 and then transferred to a hydrothermal reaction kettle. Then, 20 mL of 0.0.1 mol / L hydrochloric acid aqueous solution was added dropwise for hydrolysis. After the hydrolysis reaction occurred for 8 minutes, a stainless steel substrate was added to the solution, and the substrate treatment method was the same as in Example 2. After the hydrolysis reaction was completed, the hydrothermal reaction kettle was sealed and placed in a muffle furnace to raise the temperature to 180°C at 2°C / min for 2 h. After the reaction is finished and cooled, the substrate is taken out, washed, and dried to obtain a thin film material with titanium dioxide nanowire arrays. The cycle performance curve of the obtained nanowire array titanium dioxide anode material is ...

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Abstract

The invention discloses a water-solution lithium ion battery negative pole material and a preparation method thereof. The preparation method comprises the following steps of: (1) dissolving titanium salt in an organic solvent, preparing a solution with the concentration of 0.005 mol / L-3mol / L, adding a hydrolysis inhibitor to the solution, hydrolyzing in a reaction vessel, wherein the hydrolyzing time is 0.5-60 min, the hydrolysis inhibitor is an acid solution, and the concentration of the hydrolysis inhibitor is 0.001 mol / L-0.1mol / L; (2) adding a basal body in hydrolyzing solution in step (1); (3) sealing the reaction vessel, carrying out solvent hot reaction at 120 DEG C-350 DEG C, wherein the thermal insulation time is 0.5-48 hours; and (4) cooling to room temperature, washing, drying, and obtaining the required negative pole material. The method provided by the invention has the advantages that the operation is convenient, the preparation process is easy to implement, the charging-discharging stability of the acquired negative pole material is good, the multiplying power performance is excellent, and the water-solution lithium ion battery negative pole material has great application prospects.

Description

technical field [0001] The invention relates to an electrode material and its preparation, in particular to a negative electrode material for an aqueous solution lithium ion battery and a preparation method thereof, belonging to the technical field of energy materials and electrochemistry. Background technique [0002] Energy crisis and environmental problems are two severe challenges that mankind must face in the 21st century. The development of new clean energy such as solar energy and wind energy has attracted the attention of countries all over the world. The development of solar energy, wind energy and other new energy sources and the development of electric vehicles all need to consider the corresponding energy storage system; the peak-shaving process of the power grid also requires low-cost large-scale energy storage devices. Therefore, high-performance, low-cost, and high-safety electric energy storage technology is one of the key technologies to achieve sustainable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/48H01M10/36B82Y30/00
CPCY02E60/12Y02E60/10
Inventor 王海波吴曲勇高立军倪江锋朱碧玉
Owner SUZHOU UNIV
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