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US 12,015,160 B2Granted
Nanowire catalyst for fuel cell and method of manufacturing same
AssigneesHyundai Motor Company, Kia Corporation
InventorDong Yoon Shin
Life of this patent
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Abstract
A nanowire catalyst for a fuel cell has a porous structure in which first and second pores having predetermined pore sizes are uniformly dispersed inside and on the surface thereof at a predetermined volume ratio. This enables the efficient exposure of active sites and efficient mass transfer, thereby improving fuel cell performance.
Claims15
A method of manufacturing a nanowire catalyst for a fuel cell, the method comprising:
- preparing a first mixture by mixing a first polymer precursor and a first metal precursor in a first solvent;
- preparing a second mixture by adding a second polymer precursor to the first mixture;
- electrospinning the second mixture;
- and
- heat-treating a resultant product resulting from the electrospinning;
- wherein the heat-treating of the resultant product resulting from the electrospinning comprises:
- subjecting the resultant product resulting from the electrospinning to a primary heat treatment for pyrolysis of the second polymer precursor;
- and
- subjecting a resultant product resulting from the pyrolysis to a secondary heat treatment for carbonization in a reducing atmosphere;
- wherein the primary heat treatment is performed at a temperature of 550° C. to 650° C. in an air atmosphere;
- and
- wherein the secondary heat treatment is performed at a temperature of 200° C. to 300° C. in the reducing atmosphere comprising hydrogen.
9 more elements
A method of manufacturing a nanowire catalyst for a fuel cell, the method comprising:
- preparing a first mixture by mixing a first polymer precursor and a first metal precursor in a first solvent;
- preparing a second mixture by adding a second polymer precursor to the first mixture;
- electrospinning the second mixture;
- and
- heat-treating a resultant product resulting from the electrospinning,
- wherein the heat-treating of the resultant product resulting from the electrospinning comprises:
- subjecting the resultant product resulting from the electrospinning to a primary heat treatment for pyrolysis of the second polymer precursor;
- and
- subjecting a resultant product resulting from the pyrolysis to a secondary heat treatment for carbonization in a reducing atmosphere,
- wherein the primary heat treatment is performed at a temperature of 550° C. to 650° C. in an air atmosphere,
- wherein the secondary heat treatment is performed at a temperature of 200° C. to 300° C. in the reducing atmosphere,
- wherein the first metal precursor comprises at least one selected from the group consisting of a platinum salt, a palladium salt, a gold salt, a silver salt, and an iridium salt.
9 more elements
Dependencies are inferred from the claim text.