The design and exploration of carbon-based electrode materials have become highly signi cant for developing supercapacitor technology, which has attracted considerable attention in energy storage systems. Here, nitrogen-doped reduced graphene oxide (N-rGO) -Polyaniline (PANI) nanocomposites were synthesized by a facile two-step method in which in situ polymerization of aniline monomer was performed on hydrothermally synthesized N-rGO nanosheets in DBSA and H 2 SO 4 medium for co-doping of PANI chains. The effects of acid concentrations (DBSA:H 2 SO 4 0.5 − 0.25:1 n/n) and N-rGO:aniline ratio (N-rGO:aniline 1:4-10 m/m) used in the preparation of the electrode material on the capacitive properties were investigated. It is found that the codoped N-rGO-PANI nanocomposites exhibit a high speci c capacitance of 346.3 Fg − 1 at 1 Ag − 1 , remarkable rate capacity (99.9%, 1-10 Ag − 1 ) and excellent cycling stability at 5 Ag − 1 (81.3%, 5000 cycles) in a two-electrode system. As a result, constructing codoped PANI chains and N-doped rGO provided a viable and simple way to improve the capacitive performances of supercapacitors.
The design and exploration of carbon-based electrode materials have become highly significant for developing supercapacitor technology, which has attracted considerable attention in energy storage systems. Here, nitrogen-doped reduced graphene oxide (N-rGO) – Polyaniline (PANI) nanocomposites were synthesized by a facile two-step method in which in situ polymerization of aniline monomer was performed on hydrothermally synthesized N-rGO nanosheets in DBSA and H2SO4 medium for co-doping of PANI chains. The effects of acid concentrations (DBSA:H2SO4 0.5 − 0.25:1 n/n) and N-rGO:aniline ratio (N-rGO:aniline 1:4–10 m/m) used in the preparation of the electrode material on the capacitive properties were investigated. It is found that the co-doped N-rGO-PANI nanocomposites exhibit a high specific capacitance of 346.3 Fg− 1 at 1 Ag− 1, remarkable rate capacity (99.9%, 1–10 Ag− 1) and excellent cycling stability at 5 Ag− 1 (81.3%, 5000 cycles) in a two-electrode system. As a result, constructing co-doped PANI chains and N-doped rGO provided a viable and simple way to improve the capacitive performances of supercapacitors.
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