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Electrolytic solution based on iodic salt ethanol solution and its use

A technology of ethanol solution and electrolyte, applied in the field of electrolyte, can solve the problems of incomplete filling of porous electrodes of batteries, solvent toxicity, etc., and achieve the effect of improving ion conductivity, good fluidity, and high conductivity

Inactive Publication Date: 2007-06-27
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of existing composite electrolytes such as incomplete filling of the porous electrodes of the battery and the toxicity of the solvent, thereby providing an electrolyte based on iodized salt ethanol solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] LiI and elemental I 2 Add in ethanol, make the concentration of LiI in the ethanol solution be 1.7mol / L, elemental I in the solution 2 The molar ratio of iodide ions to LiI is 0.01:1, heated at 50°C, stirred at a speed of 300 rpm, and mixed uniformly to obtain the electrolyte solution based on iodine salt ethanol solution of the present invention.

[0031] Dye-sensitized solar cells were assembled therefrom as described in the experimental part of Journal of the American Chemical Society, vol.115, p.6382, 1991. Deposition of TiO on conductive glass by blade coating or screen printing 2 Thin films were annealed at 450 °C for 30 min. Deposit TiO by this method 2 Thin film 2~5 times, make film thickness be about 10~20 microns. Then anneal at 450°C for 30 minutes, and when the temperature is lowered to about 80°C, the TiO 2 Dye RuL 2 (NCS) 2 .2H 2 O (where L is 2,2'-bipyridine-4,4'-dicarboxylic acid) in ethanol solution (concentration 0.3 mM). After soaking for 12 ...

Embodiment 2

[0036] Electrolytes based on ethanol solutions of different iodine salts were prepared according to the method in Example 1, and assembled into dye-sensitized solar cells. The composition and cell efficiency are listed in Table 2.

[0037] Table 2: C 2 h 5 OH+mMI n (L) v +wI 2 +zA

[0038]

make up

No Iodized salt MI n Complex L I 2 add

Intake

w Additive A Battery

efficiency

(%)

type concentration

m (mol / L

type coordination

number v

type Concentration Z

(mol / L) 2

LiI

4.2

-

-

0.001∶1

pyridine

0.01

4.3

3

LiI

2.8

Methanol

4

0.01∶1

pyridine

2.5

4.8

4

LiI

2.1

propanol

4

0.5∶1

pyridine

5.0

4.5

5

LiI

1.1

Butanol

4

-

4-tert-butylpyridine

-

3.9

6

LiI

0.8

octanol

...

Embodiment 3

[0049] According to the method in Example 2, gelling agent G or ceramic powder CP is added to the prepared electrolyte based on different iodized salt ethanol solutions to gel the electrolyte, and a gel electrolyte is prepared, which is assembled into a dye-sensitized The solar cells, their compositions and cell efficiencies are listed in Table 3.

[0050] Table 3: C 2 h 5 OH+mMI n (L) v +wI 2 +xG+yCP+zA

[0051]

make up

No

Iodized salt MI n

Complex L

I 2 add

Intake

w Gel G

or ceramic powder

Last CP

Additive A

Electricity

pool

effective

Rate

(%)

type

concentration

m (mol / L

type match

bit

number

v

type x

or

the y

(%)

type

concentration

z

(mol / L) 159

LiI

4.2

-

-

0.001∶1

SiO 2

0.1

pyridine

0.01

4.4

160...

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Abstract

This invention relates to an electrolyte based on iodine salt alcohol solution, which is made from mixing iodine salt, simple substance 12 and alcohol solution uniformly and may include ligand compound, additive, gel agent and ceramic powder coordinated with the iodine salt. This invented electrolyte can be used in dye sensitized solar cells or other energy-storage or conversion devices such as electrochemical cells and capacitors and the advantage of the electrolyte is to become liquid state, solid or gel state according to the needs and fills the porous membrane of dye sensitized soalr cells fully and contacts with electrode very well to keep the cell at high photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to an electrolyte solution based on iodine salt ethanol solution and its application in dye-sensitized solar cells and other energy conversion and storage devices. Background technique [0002] Electrolyte materials with high conductivity and stable performance can be used as electrolytes for various batteries and have broad application prospects. In 1991, Professor Gr_tzel Michael of the Swiss Federal Institute of Technology and his collaborators published an article in the "Nature" magazine (Nature, Volume 353, Page 737, 1991 (Nature, Vol.353, 737, 1991)), introducing a A new type of solar cell - dye-sensitized solar cell. This kind of battery has simple preparation process, low cost and high efficiency, so it has attracted extensive attention from scientists all over the world. At present, the electrolytes used in this battery are mainly divided into three categories: one is to dissolve inorganic or organic iodides in organic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/14H01M6/16H01M10/40H01G9/20
CPCY02E60/122Y02E10/542Y02E60/13
Inventor 孟庆波安红利刘喜哲李冬梅李泓陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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