Asymmetric supercapacitors based on functional electrospun carbon nanofiber/manganese oxide electrodes with high power density and energy density

Lin, Sung-Chyr; Lu, Yi-Ting; Chien, Yu‐An; Wang, Jeng-An; You, Ting-Hsuan; Wang, Yusheng; Lin, Chen-Hsuan; Chen‐Chi, M.; Hu, Chi‐Chang

doi:10.1016/j.jpowsour.2017.07.052

Cited by 46 publications

(15 citation statements)

References 66 publications

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“…The oxygen‐containing functional groups on the surface of carbon materials can endow the materials with an excellent wettability, which play an important role on the performance of supercapacitors . The CDs prepared from nanographite possess a few functional groups on the surface, which may restrict their capacitive properties .…”

Section: Resultsmentioning

confidence: 99%

Highly Hydrophilic Carbon Dots' Decoration on NiCo₂O₄ Nanowires for Greatly Increased Electric Conductivity, Supercapacitance, and Energy Density

Wang

Fang

Tian

et al. 2019

Adv Materials Inter

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The design and exploration of the transition metal oxides (TMOs)–carbon composite are greatly desired for enhanced supercapacitor application due to the low hydrophilicity and electrical conductivity of the prime TMOs. In this work, the highly hydrophilic carbon dots (CDs) with an average size of 2.56 nm are synthesized by a microwave thermolysis method, and then used as a decoration agent on the surface of NiCo2O4 nanowires. The CDs‐decorated NiCo2O4 (CDs/NiCo2O4) with a high surface area of 120.0 m2 g−1 is prepared via a one‐pot hydrothermal method and subsequent annealing. Only a small amount of CDs' decoration not only makes the surface more hydrophilic and easier for aqueous electrolyte infiltration into electrode, but can also promote the electrical conductivity of the as‐synthesized CDs/NiCo2O4 to 30‐fold higher than the prime NiCo2O4, and greatly decrease the internal resistance of the electrode material. Therefore, the CDs/NiCo2O4‐based three‐electrode system shows an extremely high specific capacitance (2202 F g−1) while a symmetrical CDs/NiCo2O4 supercapacitor offers a desirable energy density up to 73.5 Wh kg−1. This work provides a new strategy to improve supercapacitance as well as energy density of TMO‐based electrodes via a convenient surface decoration method by using carbon nanomaterials.

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Section: Resultsmentioning

confidence: 99%

Highly Hydrophilic Carbon Dots' Decoration on NiCo₂O₄ Nanowires for Greatly Increased Electric Conductivity, Supercapacitance, and Energy Density

Wang

Fang

Tian

et al. 2019

Adv Materials Inter

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“…Ragone plot (Figure 6b) of ASC PVA/PEDOT//rGO can deliver reasonably high specific energy of 21.25 Wh·kg −1 The performance of the assembled ASC is further evaluated by GCD analysis at current densities from 0.4 to 0.8 A·g −1 at 1.6 V operating potential as shown in Figure 6a. PVA/PEDOT nanofibers//rGO shows a nearly symmetric triangular shape, showing an ideal capacitive behavior of PVA/PEDOT nanofibers//rGO [33]. A slight IR drop is observed at the beginning of these discharging curve, illustrating the influence of the internal resistance of electrode [39].…”

Section: Electrochemical Characterizationsmentioning

confidence: 93%

“…Figure 4a display to CV profiles of the individual PEDOT and PVA/PEDOT at a sweeping rate of 25 mV·s −1 which noted that PVA/PEDOT nanofibers exhibit higher integrated CV area in comparison with PEDOT. This suggests that the formation of PVA nanofibers via electrospinning could provide more accessible sites for electron transfer [33]. The specific capacitance of the ASC is obtained from the CV curve using Equation (1) [10].…”

Section: Electrochemical Characterizationsmentioning

confidence: 99%

Facile Electrodeposition of Poly(3,4-ethylenedioxythiophene) on Poly(vinyl alcohol) Nanofibers as the Positive Electrode for High-Performance Asymmetric Supercapacitor

2019

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Poly(vinyl alcohol)/poly(3,4-ethylenedioxythiophene) (PVA/PEDOT) nanofibers were synthesized as a positive electrode for high-performance asymmetric supercapacitor (ASC). PVA/PEDOT nanofibers were prepared through electrospinning and electrodeposition meanwhile reduced graphene oxide (rGO) was obtained by electrochemical reduction. The PVA/PEDOT nanofibers demonstrated cauliflower-like morphology showing that PEDOT was uniformly coated on the smooth cross-linking structure of PVA nanofibers. In addition, the ASC showed a remarkable energy output efficiency by delivering specific energy of 21.45 Wh·kg−1 at a specific power of 335.50 W·kg−1 with good cyclability performance (83% capacitance retained) after 5000 CV cycles. The outstanding supercapacitive performance is contributed from the synergistic effects of both PVA/PEDOT//rGO, which gives promising materials for designing high-performance supercapacitor applications.

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“…Among electrode materials, transition metal oxides (TMOs) show the higher performance ascribed to their complex valence states, while carbon materials usually shows a lower performance. It can reveals promising prospects of TMOs in supercapacitors application …”

Section: Introductionmentioning

confidence: 99%

“…It can reveals promising prospects of TMOs in supercapacitors application. [16][17][18][19][20][21][22] Among TMOs, RuO 2 has used as SCs electrode materials because of its highest capacity and ideal capacitive behavior, but the practical application has been restricted by its expensive costs and high toxicity. 23,24 Researchers are focusing on spinel structure MCo 2 O 4 (M = Fe, Ni, Zn, Mn) ascribed to their low cost and high electrochemical performances used as supercapacitor electrode.…”

Section: Introductionmentioning

confidence: 99%

Hierarchitecture Co ₂ (OH) ₃ Cl@FeCo ₂ O ₄ composite as a novel and high‐performance electrode material applied in supercapacitor

Wang

Peng

et al. 2020

Int J Energy Res

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Summary One‐step hydrothermal reaction has successfully been used to prepared three‐dimensional hierarchitecture Co2(OH)3Cl@FeCo2O4 composite without any annealing treatment. The samples are investigated to confirm the crystal structure, elemental composition, morphology structure and electrochemical performance. The results show the sample has a three‐dimensional hierarchitecture that nanoblocks are assembled with nanoparticles. And the specific surface area is 87.5 m2 g−1 and the total pore volume is 0.17 cm3 g−1. Meanwhile, the composite shows a high specific capacitance of 1110.0 F·g−1 at 1 A·g−1 and great cycling stability with 98.8% capacitance retention after 3000 cycles. To evaluate the electrochemical performances, the results are used to compare with the Co2(OH)3Cl and FeCo2O4 nanomaterials, indicating a higher capacitance and longer cycle stability shown by the as‐synthesized sample. The as‐synthesized Co2(OH)3Cl@FeCo2O4 composite has an outstanding electrochemical performance, predicting an enormous potential and promising future as a novel electrode material applied in supercapacitor.

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Asymmetric supercapacitors based on functional electrospun carbon nanofiber/manganese oxide electrodes with high power density and energy density

Cited by 46 publications

References 66 publications

Highly Hydrophilic Carbon Dots' Decoration on NiCo₂O₄ Nanowires for Greatly Increased Electric Conductivity, Supercapacitance, and Energy Density

Highly Hydrophilic Carbon Dots' Decoration on NiCo₂O₄ Nanowires for Greatly Increased Electric Conductivity, Supercapacitance, and Energy Density

Facile Electrodeposition of Poly(3,4-ethylenedioxythiophene) on Poly(vinyl alcohol) Nanofibers as the Positive Electrode for High-Performance Asymmetric Supercapacitor

Hierarchitecture Co ₂ (OH) ₃ Cl@FeCo ₂ O ₄ composite as a novel and high‐performance electrode material applied in supercapacitor

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Asymmetric supercapacitors based on functional electrospun carbon nanofiber/manganese oxide electrodes with high power density and energy density

Cited by 46 publications

References 66 publications

Highly Hydrophilic Carbon Dots' Decoration on NiCo2O4 Nanowires for Greatly Increased Electric Conductivity, Supercapacitance, and Energy Density

Highly Hydrophilic Carbon Dots' Decoration on NiCo2O4 Nanowires for Greatly Increased Electric Conductivity, Supercapacitance, and Energy Density

Facile Electrodeposition of Poly(3,4-ethylenedioxythiophene) on Poly(vinyl alcohol) Nanofibers as the Positive Electrode for High-Performance Asymmetric Supercapacitor

Hierarchitecture Co 2 (OH) 3 Cl@FeCo 2 O 4 composite as a novel and high‐performance electrode material applied in supercapacitor

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Highly Hydrophilic Carbon Dots' Decoration on NiCo₂O₄ Nanowires for Greatly Increased Electric Conductivity, Supercapacitance, and Energy Density

Highly Hydrophilic Carbon Dots' Decoration on NiCo₂O₄ Nanowires for Greatly Increased Electric Conductivity, Supercapacitance, and Energy Density

Hierarchitecture Co ₂ (OH) ₃ Cl@FeCo ₂ O ₄ composite as a novel and high‐performance electrode material applied in supercapacitor