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MES research in electrode, membrane. A flexible electrode of NH4CoPO4 · H2O composite bacterial cellulose (Co‐BC) has been successfully p...

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Coulombic efficiency9%

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Abstract

A flexible electrode of NH4CoPO4 · H2O composite bacterial cellulose (Co‐BC) has been successfully prepared via a hydrothermal method. A bacterial cellulose (BC) membrane was used as a host matrix for nanocrystalline (NC) NH4CoPO4 · H2O. The preparation process included anchoring nanocrystalline NH4CoPO4 · H2O on BC nanofibers with an intrinsic 3D network structure. X‐ray diffraction (XRD) results indicated the orthorhombic structure of the NH4CoPO4 · H2O NC within the Pmn21 space group and BC of a Type‐I structure. FE‐SEM images revealed microplate‐like NH4CoPO4 · H2O structures on BC nanofibers. The a three‐electrode system of all samples were studied for their electrochemical properties by CV, charge/discharge and EIS estimations in a 3 M KOH electrolyte. A maximal specific area capacitance of 158.5 mF cm⁻² (43.3 F g⁻¹) was obtained at a current density of 0.25 mA cm⁻² using a Co‐BC90 electrode. Moreover, this sample show an excellent capacitance retention of 99% after a 3000 cycle at 1 mA cm⁻² current density.

Keywords

Bacterial celluloseNanocrystalline materialSupercapacitorOrthorhombic crystal systemElectrodeComposite number

Identifiers

DOI
10.1002/er.6001
Journal
International Journal of Energy Research
Year
2020