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Synergistic curing and carbonization of benzoxazine-phenolic resin: A strategy to improve carbon paper properties and PEMFC performance
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DOI：10.1016/j.colsurfa.2026.141507.png)
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Abstract
En 中文
The phenolic resin defects (high curing shrinkage, low carbon yield, poor mechanical properties) limited carbon paper (CP) performance and PEMFC performance. This study modified CP via co-curing benzoxazine (BZ) with phenolic resin. Blended impregnation solutions (BZ dosages: 0%-100%) were used to impregnate raw CP, followed by pre-curing, hot-press curing, and carbonization. Results show BZ undergoes ring-opening polymerization catalyzed by phenolic hydroxyl groups, forming a C/H/O/N hybrid cross-linked network with synergistic curing/carbonization effects. BZ-derived nitrogen improves resin thermal stability and maximum residual carbon rate of 58.6% at 40% BZ dosage. At 40% BZ dosage, carbonized CP (CACP-40) exhibits optimal performance: resistivity 3.63 mΩ·cm, tensile strength 8.63 MPa (27.1% and 92.2% higher than unmodified CACP-0). PEMFCs with CACP-40 achieve 0.439 W·cm⁻² peak power density (36.8% higher than CACP-0). After 5 h durability cycles, CACP-40 maintains stable performance, outperforming control sample and commercial CP. This study provides an effective strategy to enhance CP and PEMFC performance.
Keywords:
PEMFCs
Carbon paper
Phenolic resin
Tensile strength
Resistivity
Journal
C
IF:
5.4
Papers:
153
Citations:
0
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Cited Papers