IOP Conference Series Materials Science and Engineering · 2018 · 24 citations · 4 references
Natural SciencesMaterials EngineeringMaterials ScienceElectrochemical EngineeringElectrochemistryMaterials ChemistryCarbon NanomaterialsElectrode MaterialsNanocompositesNanomaterials For Energy StorageSupercapacitor MaterialsSupercapacitorsCapacitanceCarbonization ProcessesCo-precipitationCo-precipitation SynthesisComposite Electrode MaterialsElectrochemical PotentialsVoltammetryX-ray Diffraction Analysis
The lignin-based biochar/graphene composites were effectively obtained via an easy and rapid co-precipitation method. The chemical structure, microstructure, electrochemical properties of lignin/graphene oxide composites before and after carbonization were investigated by Fourier transformation infrared spectrum (FTIR), Scanning electron microscope (SEM), x-ray diffraction (XRD) and cyclic voltammetry (CV). FTIR results confirmed that the oxygen-containing groups of lignin, GO and their composites were partly removed after 800 °C carbonization and GO had a positive impact on the formation of graphitic structure for lignin. XRD results showed that lignin could completely block the restacking of GO sheets. The electrochemical test presented that lignin/graphene oxide composites exhibited a typical CV curve and the specific capacitance reached ∼103F/g at a scan rate of 20mv/s.
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Holey graphene frameworks for highly efficient capacitive energy storage
Yuxi Xu, Zhaoyang Lin, Xing Zhong et al. · Nature Communications · 2014 · 1.4K citations · Full text
Natural Sciences, Materials Engineering, Materials Science +14