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High-Performance Carbon Fiber Paper Enabled by Amino Resin-Derived Low-Temperature Carbonization.
Tao Qin1, Xiaosong Pu1, Shouqing Liu1
1College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China.
Materials (Basel, Switzerland)
|March 28, 2026
Summary
A new melamine-hexamethylenediamine resin creates superior carbon fiber paper (CFP) with enhanced strength and conductivity at lower temperatures. This advanced CFP offers better performance for fuel cell applications.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Chemistry
Background:
- Conventional phenolic-resin-based carbon fiber paper (CFP) exhibits limitations in mechanical properties, conductivity, and pore structure.
- High-temperature graphitization is typically required to achieve desired conductivity in phenolic-resin-based CFP, increasing production costs and energy consumption.
Purpose of the Study:
- To develop a novel melamine-hexamethylenediamine (MH) resin-based carbon fiber paper (MHCFP) with improved performance characteristics.
- To investigate the synergistic effects of interfacial bonding, triazine-ring-induced carbon cluster formation, and nitrogen doping on MHCFP properties.
- To present a low-temperature fabrication strategy for high-performance CFP suitable for proton exchange membrane fuel cell gas diffusion layers.
Main Methods:
- Fabrication of MH resin-based CFP (MHCFP) using a novel melamine-hexamethylenediamine thermosetting resin as a binder.
- Characterization of MHCFP properties, including mechanical strength, toughness, in-plane resistivity, and porous structure, after moderate carbonization (500-700 °C).
- Comparative analysis of MHCFP performance against phenol-formaldehyde-based CFP (PFCFP).
Main Results:
- MHCFP demonstrated significantly superior toughness and tensile strengths (23-45 MPa) compared to PFCFP (8-18 MPa).
- MHCFP achieved lower in-plane resistivity (24-39 mΩ·cm) than PFCFP (54-83 mΩ·cm) at moderate carbonization temperatures.
- The developed MHCFP exhibits a highly open macroporous structure (> 78% porosity), ensuring excellent gas permeability and water management.
Conclusions:
- The novel MH resin binder enables the low-temperature fabrication of high-performance CFP with enhanced mechanical and electrical properties.
- The synergistic effects of the MH resin contribute to superior performance, overcoming limitations of conventional phenolic-resin-based CFP.
- MHCFP presents a promising alternative for next-generation proton exchange membrane fuel cell gas diffusion layers due to its improved characteristics and efficient low-temperature processing.
