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Proton conductor

A proton conductor and cathode technology, applied in the direction of conductors, non-metallic conductors, conductive materials, etc.

Inactive Publication Date: 2007-12-05
SAMSUNG ELECTRONICS CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at 120°C, Zr(HPO 4 ) 2 The ionic conductivity is about 10 -6 S / cm, which is not sufficient for use in PEMFC

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1---SnP 2 o 7 preparation of

[0050] First, ammonia solution was added dropwise to the SnCl 4 in aqueous solution, thus generating Sn(OH) 4 . The obtained Sn(OH) 4 Washed with water, filtered, dried at 80°C for 5 hours, dried again at 130°C for 5 hours, and heat-treated at 550°C for 2 hours. As a result, synthesized by SnO 2 ·xH 2 SnO shown by O 2 or SnO 2 Hydrate, where x is 0-4.

[0051] SnO 2 ·xH 2 O and 105% by weight phosphoric acid (from Rasa Industries, Ltd., Japan) were mixed in a weight ratio of 1:2, and stirred at 350° C. for 3 hours. The resulting mixture was heat-treated at 650° C. for 2 hours, thereby forming a powder. The powder was identified by XRD. The results are shown in Figure 1. Based on the plot in Figure 1, it was confirmed that the powder is SnP 2 o 7 .

Embodiment 2 and 3

[0052] Examples 2 and 3---SnP 2 o 7 preparation of

[0053] Prepare two kinds of SnP with the same method as embodiment 1 2 o 7 , except for SnO 2 ·xH 2 A mixture of O and 105% by weight phosphoric acid was heat treated at 650°C for 1 hour and 3.5 hours, respectively.

[0054] SnP 2 o 7 ionic conductivity of particles

[0055] Under the pressure of about 45MPa, compress the SnP prepared according to Examples 1-3 2 o 7 powder so as to prepare a cross-sectional area of ​​3.14 cm 2 and grains with a thickness of 1-2mm. SnP measurement using a 4-probe conductivity measurement device 2 o 7 The ionic conductivity of the particle with respect to temperature. At a frequency of 100KHz-1Hz and a voltage of 100mV, the temperature changed from room temperature to 170°C. The results are shown in Figures 2 and 3.

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Abstract

This is the proton conductor in which SnP2O7is used. The SnP2O7develops high ion conductance of 10-1-10-2S / cm level in anhydride state at a high temperature of about 80[deg.]C or more. The SnP2O7is also non-water soluble and is stable at high temperatures. Therefore, SnP2O7can act as a non-humidified type proton conductor or as a high temperature non-humidified type proton conductor.

Description

technical field [0001] The present invention relates to a proton conductor and a fuel cell including the proton conductor, more particularly, the present invention relates to a proton exchange membrane fuel cell (PEMFC). Background technique [0002] Fuel cells generate electricity by electrochemically reacting fuel with oxygen. According to the electrolyte used, fuel cells are classified into polymer electrolyte membrane fuel cells (PEMFC), phosphoric acid fuel cells (PAFC), molten carbonate fuel cells (MCFC), solid oxide fuel cells (SOFC), etc. The electrolyte determines the operating temperature of the fuel cell and the components that make up the fuel cell. [0003] PEMFCs include a proton-conducting polymer electrolyte membrane as the electrolyte. Typically, a PEMFC includes an anode (fuel electrode), a cathode (oxidant electrode) and a polymer electrolyte membrane placed between the anode and cathode. The anode of the PEMFC includes a catalys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04H01M8/10H01B1/00C25B13/04B01D67/00B01D69/14C01B25/37C01G17/02C01G19/02C01G21/02C25B13/00C25C7/04H01B1/06H01M4/86H01M4/90H01M8/02
CPCH01M8/1016C01B25/37Y02E60/521B01D67/0079H01M4/9016H01M4/8605H01M4/8652B01D69/141Y02E60/50B01D67/00793B01D69/1411A47J37/067A47J36/04
Inventor 权京重失野正也宣熙英朴贞玉
Owner SAMSUNG ELECTRONICS CO LTD