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Photo-charging secondary battery taking phteropoly acid salt as negative electrode material

A technology of heteropoly acid salts and negative electrode materials, which is applied in battery electrodes, solar cells, circuits, etc., can solve the problems of unable to meet the large-scale storage of solar energy, and the performance cannot meet the requirements of battery applications, etc., and achieve low environmental hazards and high thermal stability. The effect of safety on sex and reaction conditions

Inactive Publication Date: 2018-05-04
INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the storage capacity of photorechargeable secondary batteries is far lower than that of traditional secondary batteries such as nickel metal hydride and lead-acid batteries, and its performance cannot meet the requirements of battery applications and cannot meet the large-scale storage of solar energy.

Method used

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  • Photo-charging secondary battery taking phteropoly acid salt as negative electrode material
  • Photo-charging secondary battery taking phteropoly acid salt as negative electrode material
  • Photo-charging secondary battery taking phteropoly acid salt as negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of nano ammonium phosphotungstate negative electrode material and electrode sheet:

[0031] (1) Preparation of nano ammonium phosphotungstate: take 25ml, 0.19mol / L ammonium chloride solution, slowly add the ammonium chloride solution into 50ml, 0.09mol / L phosphotungstic acid solution, and the reaction temperature is 40℃ , Magnetic stirring speed 550r / min. The reaction time is 8h. Cool to room temperature after the reaction, wash and dry. Potassium phosphotungstate was prepared with nanometer microspheres. Its transmission electron microscope picture is shown in figure 2 .

[0032] (2) Mix the nano-ammonium phosphotungstate material prepared above, acetylene black and PVDF according to the weight ratio of 7:2:1, N-methylpyrrolidone is used as the dispersant, stir well to make the mixture uniform, and roll it into a sheet. Vacuum dry at 80°C for 12 hours for later use.

[0033] (3) Use the lithium iodide propylene carbonate solution prepared above as th...

Embodiment 2

[0035] Preparation of nano ammonium phosphomolybdate negative electrode material and electrode sheet:

[0036] Replace the phosphotungstic acid solution in step (1) in Example 1 with phosphomolybdic acid solution, and replace the reaction time of step (1) in Example 1 from 8h to 6h. In the step (2) of Example 1, nano-ammonium phosphotungstate was replaced with nano-ammonium phosphomolybdate, and the others were the same as in Example 1. The voltage-time curve when the light charging time is 20min and the discharge current density is 75mA / g is as follows Figure 5 shown. The discharge capacity-cycle life curve of the prepared nano-ammonium phosphotungstate negative electrode material is as follows: Figure 6 shown.

Embodiment 3

[0038] Preparation of nano-potassium silicotungstate material:

[0039] Replace the ammonium chloride solution in step (1) in Example 1 with potassium chloride solution, replace the phosphotungstic acid solution in step (1) in Example 1 with silicotungstic acid solution, and replace the solution in step (1) in Example 1 with In (1) the reaction temperature is replaced from 40°C to 60°C, and the reaction time in (1) in Example 1 is replaced from 8h to 4h. In the step (2) of Example 1, nano ammonium phosphotungstate was replaced by nanometer potassium silicotungstate, and the others were the same as in Example 1. The voltage-time curve when the light charging time is 30min and the discharge current density is 50mA / g is as follows Figure 7 shown. The discharge capacity-cycle life curve of the prepared nano-potassium silicotungstate negative electrode material is as follows: Figure 8 shown.

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Abstract

The invention relates to a photo-charging secondary battery taking phteropoly acid salt as a negative electrode material. The battery comprises a photo positive electrode (1), a positive electrode (2), a negative electrode (3) and a lithium ion conductor film (4). The negative electrode material is an electrode sheet which is prepared by the following steps: mixing a nano heteropolyacid salt material, a conducting agent and an adhesive in a certain mass ratio; adding the mixture into a dispersant; fully stirring and uniformly mixing the mixture; and coating and drying the mixture to obtain theelectrode sheet. Preparation of the nano heteropolyacid salt material comprises mixing an inorganic salt solution with a heteropolyacid aqueous solution to obtain a solid phase heteropolyacid salt material and an electrode material. The heteropolyacid salt adopted by the invention is diversified in structure and composition, is high in thermal stability and photo reducing property, and can perform reversible and continuous polyelectron redox. The photo-charging secondary battery prepared by the method can be charged under an illuminating condition. Solar energy is utilized fully, the chargingenergy is saved, and the battery is low in cost and equipment is simple.

Description

technical field [0001] The invention relates to a photorechargeable secondary battery using heteropolyacid salt as a negative electrode material, and belongs to the technical field of photoelectrochemical batteries. Background technique [0002] The development of clean and renewable energy is an effective way to solve problems such as global warming and energy crisis. Solar energy has the advantages of being clean, renewable, and rich in resource reserves, and is considered to be the most effective alternative to fossil energy. However, affected by the length of sunshine duration and large changes in intensity, solar energy needs to be converted and stored into electrical energy that can be output stably before it can be effectively utilized by humans. A photorechargeable secondary battery is an energy conversion and storage device that can directly convert solar energy into chemical energy and electrical energy. The battery combines the photoelectric conversion function ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M14/00H01M4/58
CPCH01M4/58H01M14/005Y02E60/10
Inventor 晏南富崔红敏石劲松柳跃伟
Owner INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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