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PEMFC용 복합소재 분리판을 위한 2단계 제조공법의예비성형 조건에 대한 연구

A Study on Precuring Condition of the 2-step Manufacturing Method for PEMFC Composite Bipolar Plates

장준호|오경석|한경섭|허성일|양유창
한국복합재료학회 (The Korean Society For Composite Materials)|2007.04|Composites Research|제20권 제2호|pp. 10-16

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키워드

PEMFC고분자 전해질 연료전지Preform복합소재 분리판예비성형체팽창흑연Composite Bipolar PlateExpanded Graphite
주제분류재료공학

초록

The 2-step manufacturing method consisting of preforming and stamping processes was developed to manufacture composite bipolar plates for PEMFCs. The preform was composed of expanded graphite, graphite flake and phenol resin. Precuring conditions were optimized by checking the electrical conductivity, flexural strength and microstructure. Precuring temperature (100℃) slightly above the melting point of phenol powders (90℃) induced moderate curing, but also prevented excessive curing. Preforms utilizing the tangled structure of expanded graphite were easily fabricated at low pressure of 0.07-0.28MPa. The proper precuring time, 5min, was determined to fabricate the preform stably because insufficient and excessive precuring deteriorated the flexural strength of composite bipolar plates.

Abstract

The 2-step manufacturing method consisting of preforming and stamping processes was developed to manufacture composite bipolar plates for PEMFCs. The preform was composed of expanded graphite, graphite flake and phenol resin. Precuring conditions were optimized by checking the electrical conductivity, flexural strength and microstructure. Precuring temperature (100℃) slightly above the melting point of phenol powders (90℃) induced moderate curing, but also prevented excessive curing. Preforms utilizing the tangled structure of expanded graphite were easily fabricated at low pressure of 0.07-0.28MPa. The proper precuring time, 5min, was determined to fabricate the preform stably because insufficient and excessive precuring deteriorated the flexural strength of composite bipolar plates.

참고문헌 (20)

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