Quasi-solid nano-composite gel electrolyte, its production and use

A gel electrolyte and nano-composite technology, which is applied in the interdisciplinary field of chemical engineering and nano-material technology, can solve the problems of increasing the steady-state diffusion current and apparent diffusion coefficient, liquid electrolyte batteries are difficult to seal, easy to leak, etc., to achieve Improvement of charge transport ability, improvement of sealing and leakage, and improvement of photovoltage effect

Inactive Publication Date: 2009-03-18
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0030] The technical problem to be solved by the present invention is to provide a quasi-solid nanocomposite gel electrolyte and its preparation method and application, which not only solves the problems of difficult sealing and easy leakage of liquid electrolyte batteries, improves the long-term stability of batteries, but also effectively Improve the charge transport capacity in the quasi-solid gel electrolyte system, increase the steady-state diffusion current and apparent diffusion coefficient of ions participating in the redox reaction, thereby effectively improving the performance of the quasi-solid gel battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1: Weigh 0.02g, 0.04g, 1.5g, 0.15g, 0.045g, 0.09g, 0.25g lithium iodide, iodine, 3-methoxypropionitrile, vinylidene fluoride-hexafluoropropylene copolymer, respectively , Nano titanium dioxide particles, N-methylbenzimidazole, 1,2-dimethyl-3-propylimidazole iodine. Place the weighed lithium iodide, iodine, 3-methoxypropionitrile, N-methylbenzimidazole and 1,2-dimethyl-3-propylimidazole iodine in a sealable clean container. Disperse ultrasonically for 15 minutes to mix the system uniformly to form a liquid or ionic liquid electrolyte, and then add vinylidene fluoride-hexafluoropropylene copolymer and nano titanium dioxide particles to it. After the container is sealed, magnetic stirring is used to make the system evenly mixed, and the mixture in the container is heated to 100° C. and kept for 2 hours. Stirring continuously during the heating process makes the whole system evenly mixed. In order to make the nanoparticles in the system uniformly dispersed, an ultrasoni...

Embodiment 2

[0058] Example 2: Weigh 0.02g, 0.04g, 1.5g, 0.15g, 0.105g, 0.09g, 0.25g lithium iodide, iodine, 3-methoxypropionitrile, vinylidene fluoride-hexafluoropropylene copolymer, respectively , Nano titanium dioxide particles, N-methylbenzimidazole, 1,2-dimethyl-3-propylimidazole iodine. The quasi-solid nanocomposite gel electrolyte was prepared according to the manufacturing method described in Example 1. Do cyclic voltammetry with electrochemical workstation to get I 3 - The steady-state diffusion current and apparent diffusion coefficient are 1.50×10 -7 A and 3.89×10 -10 m 2 / s, I - The steady-state diffusion current and apparent diffusion coefficient are 2.34×10 -7 A and 3.04×10 -10 m 2 / s.

Embodiment 3

[0059] Example 3. Weigh 0.02g, 0.04g, 1.5g, 0.15g, 0.15g, 0.09g, 0.25g lithium iodide, iodine, 3-methoxypropionitrile, vinylidene fluoride-hexafluoropropylene copolymer , Nano titanium dioxide particles, N-methylbenzimidazole, 1,2-dimethyl-3-propylimidazole iodine. The quasi-solid nanocomposite gel electrolyte was prepared according to the manufacturing method described in Example 1. Do cyclic voltammetry with electrochemical workstation to get I 3 - The steady-state diffusion current and apparent diffusion coefficient are 1.65×10 -7 A and 4.27×10 -10 m 2 / s. I - The steady-state diffusion current and apparent diffusion coefficient are 2.24×10 -7 A and 2.90×10 -10 m 2 / s.

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Abstract

The quasi-solid and nano-multiple gel electrolyte and produce method and application is to equably mix nanograde additive into gelated electrolyte system with polymer coagulant or small molecule coagulant to get the quasi-solid and nano-multiple gel electrolyte. Compared with the common gel electrolyte, it solves the problem about sealing liquid state electrolyte batteries and leaking to enhance charge transmission ability and increase ionic steady pervasion current and apparent diffusion coefficient of redox and improving general capability of quasi-solid gel batteries. This electrolyte is using for dye-sensitized solar cell and fuel cell to enhance photovoltage, short circuit current density, photoelectric conversion efficiency and long time stability to dye-sensitized solar cell.

Description

Technical field [0001] The invention belongs to the cross-field of chemistry, chemical engineering and nanomaterial technology, and relates to a quasi-solid nanocomposite electrolyte material and its application that can be used in the fields of dye-sensitized solar cells and fuel cells, and in particular to a quasi-solid nanocomposite electrolyte and its application Application in dye-sensitized solar cells. Background technique [0002] For a long time, liquid electrolytes have been widely used in dye-sensitized solar cells, fuel cells and other fields due to the wide selection of liquid electrolyte materials, easy adjustment of electrode potential and high conductivity. However, the liquid electrolyte has the disadvantages of easy volatility of the solvent, which causes the battery to leak easily and is difficult to seal. Therefore, the non-volatile quasi-solid and non-volatile solid electrolytes have become the new focus of research by researchers. Taking dye-sensitized solar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/06H01B1/12C08L71/02C08L33/20C08L63/00C08L27/16C08K5/521C08J3/075H01G9/022H01G9/028H01G9/032H01M8/02B82B1/00B82B3/00
Inventor 霍志鹏戴松元王孔嘉
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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