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Novel metal (III) -chromium-phosphate complex and use thereof

A technology of complexes and phosphates, applied in the directions of phosphates, chromium compounds, phosphorus compounds, etc., can solve the problems of decreased ionic conductivity and failure to reach hydrogen ion conductivity.

Inactive Publication Date: 2009-01-14
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrolyte membrane exhibits 10000000000000000000000000000 under non-humidification conditions and a relatively wide temperature range from 120 to 200 °C. -2 A stable hydrogen ion conductivity value of S / cm, but the ion conductivity value does not reach the hydrogen ion conductivity of the current commercial Nafion-based electrolyte membrane (10 -1 S / cm)
[0011] In addition, in order to impart high hydrogen ion conductivity, the organic / inorganic composite electrolyte membrane disclosed in said document requires a separate post-treatment step of doping acid (phosphoric acid, sulfuric acid, etc.), while the formed electrolyte membrane is formed on the polyazole polymer , strong acids, and inorganic metal materials show non-optimized morphology
Therefore, the doped strong acid is easily separated from the electrolyte membrane at high temperature, causing the ionic conductivity of the membrane to decrease rapidly with the passage of working time.

Method used

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  • Novel metal (III) -chromium-phosphate complex and use thereof
  • Novel metal (III) -chromium-phosphate complex and use thereof
  • Novel metal (III) -chromium-phosphate complex and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Example 1: Preparation of polyparabenzimidazole copolymer

[0070] The terephthalic acid and 3,3',4,4'-tetraaminobiphenyl (3,3',4,4'-tetraaminobiphenyl) used for the polymerization reaction were dried in vacuum at 80°C for at least 24 hours. In addition, using the polyphosphoric acid provided by JUNSEI (P 2 O 5 : 85%, H 3 PO 4 : 115%) as a solvent.

[0071] Under a nitrogen atmosphere, 80 g of polyphosphoric acid was added to a reactor equipped with a stirrer, and the temperature of the reactor was increased to 170° C. to easily stir the polyphosphoric acid. Then, 3.000 g (9.334 mmol) of 3,3′,4,4′-tetraaminobiphenyl and 2.326 g (9.334 mmol) of terephthalic acid were added to the polyphosphoric acid, and the mixture was stirred for 48 hours. Then, 80 g of polyphosphoric acid and phosphoric acid were additionally added to the solution, and stirred to reduce the viscosity of the solution. As a result, a poly(2,2-p-(phenylene)-5,5-bibenzimidazole) polyphosphoric acid solution...

Embodiment 2

[0072] Example 2: Preparation of aluminum-chromium-phosphate complex

[0073] Use Al(OH) in 85% phosphoric acid solution 3 And CrO 3 To prepare Al(OH) 3 : CrO 3 : H 3 PO 4 =3:1:9 (molar ratio) aluminum-chromium-phosphate complex. For this purpose, Al(OH) is added to the 85% phosphoric acid solution 3 And dissolve at 80°C for 20 minutes until a clear liquid is formed. Then, add CrO to it 3 And the mixture was stirred for 1 hour while slowly adding methanol to it, thereby preparing an aluminum-chromium-phosphate complex [Al 3 Cr(HPO 4 ) 3 (H 2 PO 4 ) 6 ].

Embodiment 3

[0074] Example 3: Preparation of polyp-benzimidazole / aluminum-chromium-phosphate composite material

[0075] To 100 g of the 15 wt% polyp-benzimidazole polyphosphate solution prepared in Example 1, 10 g of the aluminum-chromium-phosphate prepared in Example 2 was added. The mixture was stirred at 150°C for 6 hours, thereby preparing a solution of about 50% by weight of polyp-benzimidazole / aluminum-chromium-phosphate composite material.

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Abstract

Disclosed herein are a metal(III)-chromium-phosphate complex represented by a formula of M(III)xCr(HPO4)y(H2PO4)z and the use thereof. More particularly, disclosed are an organic / inorganic composite electrolyte membrane comprising said complex, an electrode comprising said complex, a membrane-electrode assembly (MEA) comprising said organic / inorganic composite electrolyte membrane and / or electrode, and a fuel cell comprising said membrane- electrode assembly.

Description

Technical field [0001] The present invention relates to a general formula M(III) x Cr(HPO 4 ) y (H 2 PO 4 ) z The represented metal (III)-chromium-phosphate (hereinafter sometimes referred to as "MCP") complex and its use, and more specifically, relates to an organic / inorganic composite electrolyte membrane containing the complex; including the complex An electrode for a fuel cell of a substance; a membrane electrode assembly (MEA) for a fuel cell including the organic / inorganic composite membrane and / or the electrode; and a fuel cell including the membrane electrode assembly. Background technique [0002] The fuel cell is an energy conversion device that directly converts the chemical energy of the fuel into electrical energy, and has been researched and developed as a next-generation energy resource due to high energy efficiency and environmentally friendly properties such as low pollutant emissions. [0003] The polymer electrolyte membrane fuel cell (PEMFC) using hydrogen as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G37/00
CPCH01M8/1027H01M8/1081H01M8/1072H01M4/8605H01M8/1039H01M2300/0091H01M8/1023H01M4/8828H01M8/1004H01M8/103Y02E60/523H01M4/8882H01M8/1048H01M2300/0082C01B25/45H01M8/1025Y02E60/50Y02P70/50C01B25/26C01F7/00C01G37/00
Inventor 申程圭元晶慧李奉根朴容秀张宰赫金东杓
Owner LG CHEM LTD
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