Physiochemical evaluations, mechanical attenuations and thermal stability of graphene nanosheets and functionalized nanodiamonds loaded pitch derived carbon foam composites

Khan, Muhammad Saleem; Li, Tiehu; Hussain, Amjad; Raza, Ali; Zada, Amir; Dang, Alei; Khan, Ahsan Riaz; Ali, Rawaid; Hussain, Hidayat; Hussain, Javid; Wahab, Zainul; Imran, Muhammad

doi:10.1016/j.diamond.2022.109077

Cited by 40 publications

(7 citation statements)

References 54 publications

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“…The sample resistance ( R ) values were calculated at the intercept of the Nyquist plot semicircle with the impedance real axis at a high frequency. The proton conductivity [ 37 , 38 , 39 ] (σ, S/cm) was calculated according to Equation (1)

where h is the distance between electrodes (membrane thickness) and S is the electrode area.…”

Section: Methodsmentioning

confidence: 99%

Cardo Polybenzimidazole (PBI-O-PhT) Based Membrane Reinforced with m-polybenzimidazole Electrospun Nanofiber Mat for HT-PEM Fuel Cell Applications

et al. 2022

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The further development of high temperature polymer electrolyte membrane (HT-PEM) fuel cells largely depends on the improvement of all components of the membrane–electrode assembly (MEA), especially membranes and electrodes. To improve the membrane characteristics, the cardo-polybenzimidazole (PBI-O-PhT)-based polymer electrolyte complex doped with phosphoric acid is reinforced using an electrospun m-PBI mat. As a result, the PBI-O-PhT/es-m-PBInet · nH3PO4 reinforced membrane is obtained with hydrogen crossover values (~0.2 mA cm−2 atm−1), one order of magnitude lower than the one of the initial PBI-O-PhT membrane (~3 mA cm−2 atm−1) during HT-PEM fuel cell operation with Celtec®P1000 electrodes at 180 °C. Just as importantly, the reinforced membrane resistance was very close to the original one (65–75 mΩ cm2 compared to ~60 mΩ cm2). A stress test that consisted of 20 start–stops, which included cooling to the room temperature and heating back to 180 °C, was applied to the MEAs with the reinforced membrane. More stable operation for the HT-PEM fuel cell was shown when the Celtec®P1000 cathode (based on carbon black) was replaced with the carbon nanofiber cathode (based on the pyrolyzed polyacrylonitrile electrospun nanofiber mat). The obtained data confirm the enhanced characteristics of the PBI-O-PhT/es-m-PBInet · nH3PO4 reinforced membrane.

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where h is the distance between electrodes (membrane thickness) and S is the electrode area.…”

Section: Methodsmentioning

confidence: 99%

Cardo Polybenzimidazole (PBI-O-PhT) Based Membrane Reinforced with m-polybenzimidazole Electrospun Nanofiber Mat for HT-PEM Fuel Cell Applications

et al. 2022

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“…In addition, modified ZnO can also improve the piezoelectric properties of PVDF NFs. Graphene has excellent optical, electrical, and mechanical properties; combining it with other materials can improve various physical and chemical properties [119,120]. Hasanzadeh et al [110] synthesized graphene-zinc oxide nanocomposite (G-ZnO) by the hydrothermal method and added it to PVDF for electrospinning, and used XRD and TFIR to characterize the β phase of the NFs.…”

Section: Inorganic Piezoelectric Materialsmentioning

confidence: 99%

Smart Textile and Polymer Materials

2023

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“…In addition, modified ZnO can also improve the piezoelectric properties of PVDF NFs. Graphene has excellent optical, electrical, and mechanical properties; combining it with other materials can improve various physical and chemical properties [ 119 , 120 ]. Hasanzadeh et al [ 110 ] synthesized graphene–zinc oxide nanocomposite (G–ZnO) by the hydrothermal method and added it to PVDF for electrospinning, and used XRD and TFIR to characterize the β phase of the NFs.…”

Section: Preparation Of Pvdf Nfs By Electrospinningmentioning

confidence: 99%

Processes of Electrospun Polyvinylidene Fluoride-Based Nanofibers, Their Piezoelectric Properties, and Several Fantastic Applications

Bai

Liu

et al. 2022

Polymers

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Since the third scientific and technological revolution, electronic information technology has developed rapidly, and piezoelectric materials that can convert mechanical energy into electrical energy have become a research hotspot. Among them, piezoelectric polymers are widely used in various fields such as water treatment, biomedicine, and flexible sensors due to their good flexibility and weak toxicity. However, compared with ceramic piezoelectric materials, the piezoelectric properties of polymers are poor, so it is very important to improve the piezoelectric properties of polymers. Electrospinning technology can improve the piezoelectric properties of piezoelectric polymers by adjusting electrospinning parameters to control the piezoelectrically active phase transition of polymers. In addition, the prepared nanofibrous membrane is also a good substrate for supporting piezoelectric functional particles, which can also effectively improve the piezoelectric properties of polymers by doping particles. This paper reviews the piezoelectric properties of various electrospun piezoelectric polymer membranes, especially polyvinylidene fluoride (PVDF)-based electrospun nanofibrous membranes (NFs). Additionally, this paper introduces the various methods for increasing piezoelectric properties from the perspective of structure and species. Finally, the applications of NFs in the fields of biology, energy, and photocatalysis are discussed, and the future research directions and development are prospected.

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Physiochemical evaluations, mechanical attenuations and thermal stability of graphene nanosheets and functionalized nanodiamonds loaded pitch derived carbon foam composites

Cited by 40 publications

References 54 publications

Cardo Polybenzimidazole (PBI-O-PhT) Based Membrane Reinforced with m-polybenzimidazole Electrospun Nanofiber Mat for HT-PEM Fuel Cell Applications

Cardo Polybenzimidazole (PBI-O-PhT) Based Membrane Reinforced with m-polybenzimidazole Electrospun Nanofiber Mat for HT-PEM Fuel Cell Applications

Smart Textile and Polymer Materials

Processes of Electrospun Polyvinylidene Fluoride-Based Nanofibers, Their Piezoelectric Properties, and Several Fantastic Applications

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