A study of porous carbon structures derived from composite of cross-linked polymers and reduced graphene oxide for supercapacitor applications

Bakhoum, Daba T.; Oyedotun, Kabir O.; Sarr, Samba; Sylla, Ndeye Fatou; Maphiri, Vusani M.; Ndiaye, Ndeye Maty; Ngom, B.D.; Manyala, Ncholu

doi:10.1016/j.est.2022.104476

Cited by 28 publications

(5 citation statements)

References 76 publications

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“…50,55 The peak at about 285.2 eV is attributed to C-N, while the peak at 287.2 eV is assigned to CQO or C-O. 52,56,57 The result indicates the formation of the N-doped carbon skeleton, conforming the FTIR result. The N 1s high-resolution XPS spectrum (see Fig.…”

Section: Njc Papersupporting

confidence: 59%

Enhancement of the electrochemical properties of vanadium dioxide via nitrogen-doped reduced graphene oxide for high-performance supercapacitor applications

Sarr,

Bakhoum,

Sylla

et al. 2024

New J. Chem.

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Section: Njc Papersupporting

confidence: 59%

Enhancement of the electrochemical properties of vanadium dioxide via nitrogen-doped reduced graphene oxide for high-performance supercapacitor applications

Sarr,

Bakhoum,

Sylla

et al. 2024

New J. Chem.

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“…These limitations are caused by the existence of water in the mixture, which triggers oxygen and hydrogen evolutions. Many other activated carbon studies could not obtain such potential windows, especially on the negative potential, when using 2.5 M KNO 3 alone as the electrolyte [28][29][30][31]. The different potential limits are similar to the ones obtained with 2.5 M KNO 3 but with an extended potential window favoured by the presence of the EmimTFO.…”

Section: Resultsmentioning

confidence: 68%

Electrical Double-Layer Capacitor Based on Low Aqueous Electrolyte Contents in EmimTFO Ionic Liquid

Kitenge

Tarimo

Oyedotun

et al. 2023

International Journal of Energy Research

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A study has been conducted on the electrochemical properties of 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EmimTFO) protic ionic liquid enhanced by adding potassium nitrate (2.5 M) aqueous solution. The properties of EmimTFO as well as mixtures diluted by molar fractions of 0.6, 0.7, 0.8, and 0.9 of KNO3 were also investigated through measurements of viscosity, density, and conductivity. In a three-electrode test run at 0.25 A g-1, the addition of 2.5 M KNO3 solution generated peak specific capacities of ~40.2 and ~85.8 mAh g-1 on the positive and negative potentials, respectively. These performances surpassed the specific capacities obtained for EmimTFO in a three-electrode run at 0.25 A g-1 using the same electrode material (activated carbon). The top-performing electrolyte mixture ([EmimTFO]0.8[2.5 M KNO3]0.2) was then used to assemble a symmetric supercapacitor, which could run at a voltage of ~2.1 V. The device was able to retain 71.35% of its capacitance after 10,000 cycles of charge and discharge. It also displayed higher specific energy and power of 22.21 Wh kg-1 and 520 W kg-1, respectively, at 0.5 A g-1 as compared to specific energies of 4.73 Wh kg-1 and 11.2 Wh kg-1 for the devices assembled with single EmimTFO and 2.5 M KNO3 as the electrolytes, respectively.

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“…In comparison to other composite electrode materials, PANI@(MnO 2 + NiO)@GO demonstrates superior performance. For instance, it outperform cross‐linked polymer‐based porous carbonaceous materials (19.5 W h kg −1 and 400 W kg −1 ), 42 PANI/MnO 2 /nitrogen and co‐doped phosphorus carbon nanofibers composites (23.3 W h kg −1 and 174.9 W kg −1 ), 40 PANI/MnO 2 composites with polyaniline hydrogel as a substrate (23.2 W h kg −1 and 720 W kg −1 ), 36 PANI, MnO 2 and graphene nanosheet nanocomposites (5.63 W h kg −1 and 1417.34 W kg −1 ), 5 and PANI and carbon nanocomposite hydrogels (PCR) (31.32 W h kg −1 and 364.93 W kg −1 ), 43 as depicted in Figure 8c. Figure 8d shows the specific capacitance that remains at 74.2% at a high current density of 10 A g −1 .…”

Section: Resultsmentioning

confidence: 99%

Polyaniline/manganese nickel oxide/graphene composites as electrode materials for supercapacitors

Ma,

Fu,

Wei

et al. 2023

J of Applied Polymer Sci

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This study introduces a novel electrode material featuring a core‐shell intercalation structure. The material was synthesized using a simple and scalable method suitable for industrial replication. The outer layer of the electrode material comprises polyaniline, enveloping a nuclear structure composed of manganese dioxide and nickel oxide. This core‐shell configuration is then integrated into the lamellar structure of graphene oxide, resulting in the formation of PANI@(MnO2 + NiO)@GO composite. The combination of polyaniline, metal oxides, and graphene oxide demonstrates robust adsorption capacity, leading to the development of a three‐dimensional stable structure between the core and the shell. Additionally, graphene oxide contributes to the bilayer capacitance of the composites, resulting in simultaneous multiple synergistic effects and improved charge storage capacity. Electrochemical characterization reveals exceptional properties of this composite material, exhibiting a specific capacitance of 396 F g−1 at a current density of 0.5 A g−1 in a three‐electrode configuration. Furthermore, the material retains 82.6% of its capacitance after undergoing 3000 consecutive charge/discharge cycles. Calculations estimate the energy density and power density of this composite in a supercapacitor employing 1 M Na2SO4 electrolyte to be 43.2 W h kg−1 and 249.99 W kg−1, respectively.

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A study of porous carbon structures derived from composite of cross-linked polymers and reduced graphene oxide for supercapacitor applications

Cited by 28 publications

References 76 publications

Enhancement of the electrochemical properties of vanadium dioxide via nitrogen-doped reduced graphene oxide for high-performance supercapacitor applications

Enhancement of the electrochemical properties of vanadium dioxide via nitrogen-doped reduced graphene oxide for high-performance supercapacitor applications

Electrical Double-Layer Capacitor Based on Low Aqueous Electrolyte Contents in EmimTFO Ionic Liquid

Polyaniline/manganese nickel oxide/graphene composites as electrode materials for supercapacitors

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