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Method for preparing nickel aluminum lithium composite material wrapped by sulfur modified conductive polymers

A technology of conductive polymers and composite materials, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of toxicity and high price

Inactive Publication Date: 2015-04-22
林肖芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] LiCoO is currently the most commonly used commercial cathode material for lithium-ion batteries. 2 It is expensive and toxic, so people have been trying to find alternatives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Mix nickel chloride, lithium chloride, aluminum sulfate and water with the molar ratio of nickel, lithium and aluminum being 0.7:1:1.3, stir and dissolve evenly to obtain a mixed solution with a total metal ion concentration of 2mol / L, wherein the mixed solution The stirring time was 2h, and the dissolution temperature was 40°C.

[0017] Dissolve diammonium bicarbonate in water and stir to dissolve to obtain a precipitant solution with a concentration of 2mol / L. The mixed solution and the precipitant solution are slowly added dropwise at a rate of 5ml / min to obtain a reaction solution, and adjust the concentration of the reaction solution. The pH value is 8, stirred and reacted, then aged, filtered to obtain the precipitate, washed with detergent, cooled to -15°C, frozen for 6h, and then vacuum-dried to obtain the precursor; The precursor is sintered at a stable temperature of 750°C in an air atmosphere for 7 hours to obtain LiNi 0.7 al 1.3 o 4 .

[0018] Select 20-...

Embodiment 2

[0021] Mix nickel chloride, lithium chloride, and aluminum sulfate with water at a molar ratio of nickel, lithium, and aluminum of 0.7:1:1.3, stir and dissolve evenly to obtain a mixed solution with a total metal ion concentration of 2.5mol / L, wherein the mixed solution The stirring time is 4h, and the dissolution temperature is 50°C.

[0022] Dissolve diammonium bicarbonate in water and stir to dissolve to obtain a precipitant solution with a concentration of 3mol / L, slowly add the mixed solution and the precipitant solution dropwise at a rate of 10ml / min to obtain a reaction solution, and adjust the pH of the reaction solution The value is 10, stir the reaction, then age, and then filter to obtain the precipitate, wash the precipitate with detergent, cool the washed precipitate to -20 ° C, freeze for 3 hours, and then vacuum dry to obtain the precursor; The precursor is sintered at a stable temperature of 850°C in an air atmosphere for 5 hours to obtain LiNi 0.7 al 1.3 o ...

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Abstract

The invention discloses a method for preparing a nickel aluminum lithium composite material wrapped by sulfur modified conductive polymers. The method comprises the following steps that (1) LiNi0.7Al1.3O4 is prepared; (2) the sulfur modified conductive polymers are prepared; (3) coating is carried out. According to the prepared composite material, nickel aluminum lithium oxide is adopted as a main material, the surface of the nickel aluminum lithium oxide is covered with the sulfur conductive polymers with the high specific capacity, the capacity of the composite material is improved, and meanwhile conducting performance and circulating stability are improved.

Description

technical field [0001] The invention relates to a preparation method of a sulfur-modified conductive polymer-coated nickel-aluminum-lithium composite material. Background technique [0002] Lithium secondary batteries are secondary batteries capable of high charge and discharge capacity and high output power, and are currently used mainly as power sources for portable electronic devices, and are expected to be used as power sources for electric vehicles, which are expected to spread in the future. However, when used in these applications, especially when used as a power supply for automobiles, cost reduction and space saving are sought. In addition, as the current main application, that is, for portable electronic devices, further reduction in size and weight is urgently desired. [0003] LiCoO is currently the most commonly used commercial cathode material for lithium-ion batteries. 2 It is expensive and toxic, so people have been trying to find alternatives. Lithium mang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/525H01M4/62
CPCH01M4/362H01M4/485H01M4/525H01M4/624Y02E60/10
Inventor 宫香娥
Owner 林肖芬