首页|Effect of surface oxidation on the interfacial and mechanical properties in graphite/epoxy composites composite bipolar plates
Effect of surface oxidation on the interfacial and mechanical properties in graphite/epoxy composites composite bipolar plates
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Epoxy resin-reinforced graphite composites have found extensive application as bipolar plates in fuel cells for stationary power supplies,valued for their lightweight nature and exceptional durability.To enhance the interfacial properties between graphite and epoxy resin(EP),surface oxidation of graphite was carried out using diverse functional groups.Experimental assessments illustrated that the composites with graphite oxide resulted in heightened mechanical strength and toughness compared to pristine graphite,which could be attributed to the excellent interface connection.Moreover,these composites displayed remarkable conductivity while simultaneously retaining their mechanical attributes.Furthermore,molecular dynamics simulations outcomes unveiled that the inclusion of oxygen-containing functional groups on the graphite surface augmented the interfacial energy with EP,and the interface morphology between graphite and resin exhibited heightened stability throughout the stretching process.This simple and effective technique presents opportunities for improving composites interfaces,enabling high load transfer efficiency,and opens up a potential path for developing strong and tough composite bipolar plates for fuel cells.
G/EP interface strength and toughnessEpoxy resin-reinforced graphite compositesComposite bipolar platesMolecular dynamics simulationsSurface oxidation of graphite
Dongmei Yao、Junsheng Zheng、Liming Jin、Xiaomin Meng、Zize Zhan、Runlin Fan、Cong Feng、Pingwen Ming
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Clean Energy Automotive Engineering Center and School of Automotive Studies,Tongji University,Shanghai 201804,China
College of Materials Science and Engineering,Tongji University,Shanghai 201804,China
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