Synthetic Strategy for MnO<sub>2</sub> Nanoparticle/Carbon Aerogel Heterostructures for Improved Supercapacitor Performance

Liu, Xiaochan; Yi, Xibin; Zhang, Jing; Zhao, Xinfu; Liu, Sijia; Wang, Tingwei; Cui, Sheng

doi:10.1021/acsanm.3c01996

Cited by 8 publications

(2 citation statements)

References 51 publications

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“…6a, the Nyquist plots of NFC and NFS displayed a straight line of around 45°, where the NFC line was more deviated toward 90° and NFS deviated toward a more acute angle, signifying a more diffusive contribution of NFS than NFC. 59 Furthermore, Fig. 6b shows the log(frequency) vs. log( Z ′) plots of NFC and NFS.…”

Section: Resultsmentioning

confidence: 99%

Exchanging interlayer anions in NiFe-LDHs nanosphere enables superior battery-type storage for high-rate aqueous hybrid supercapacitors

Nishad,

Kotha,

Sarawade

et al. 2024

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Exchanging interlayer anions in NiFe-LDHs nanosphere enables superior battery-type storage for high-rate aqueous hybrid supercapacitors

Nishad,

Kotha,

Sarawade

et al. 2024

J. Mater. Chem. A

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“…Transition-metal oxides such as ZnO, RuO 2 , NiO, V 2 O 5 , MnO 2 , Co 3 O 4 , and CuO-based are well explored for high energy/power densities than alkaline earth metals, carbon-based materials, and polymers . In 1971, Trasatti and Buzzanca published pseudocapacitance property of transition metal oxide RuO 2 as a film electrode in the electrolyte, 1 M HClO 4 …”

Section: Introductionmentioning

confidence: 87%

Carbon-Embedded Ru/NiO-CuO Cathode and rGO/α-Co₃O₄ Anode for Synergetic Charge Transfer for High-Performance Solid-State Asymmetric Supercapacitors

Manibalan,

Govindaraj,

Rajaram

et al. 2024

Energy Fuels

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In this work, an attempt has been made to synthesize a novel heterostructure nanocomposite, C/Ru@NiO-CuO (CRNC) which is suitable for energy storage application. It was chemically synthesized at high-temperature conditions, whose structural features and surface chemistry were characterized by various analytical tools. The CRNC nanocomposite reveals the nanospherical morphology with highly crystalline heterostructure, leading to reliable electrode material-preferred advantages such as good conductivity, high-surface area, and numerous oxidation states for supercapacitor (SC) applications. Composition of high conductivity of carbon and high chemical stability of ternary metal oxides, a heterostructure CRNC electrode is proposed for effective solid-state symmetric and asymmetric battery-type SC. The as-prepared CRNC shows an excellent electrochemical performance at 0.5 A g −1 in a three-electrode cell configuration, where the specific capacitance value obtained was 318 F g −1 . Having the completion of 5000 galvanostatic charge−discharge (GCD) cycles, the electrode can hold a good capacity retention (86.7%). A solid-state asymmetric supercapacitor (ASC) was constructed by placing the separator between the CRNC and rGO/α-Co 3 O 4 , which delivers a specific capacitance of 152.5 F g −1 (at 0.5 A g −1 ) along with 87% capacitance retention after 3500 GCD cycles. Furthermore, the ASC offers energy and power density values as 21.18 W h kg −1 and 1800 W kg −1 , respectively. The novel CRNC// rGO/α-Co 3 O 4 construction implies a good structural stability, long-term cycle stability, very good rate capability, and favorable compatibility. This study reveals that carbon-embedded Ru-doped NiO-CuO nanocomposite electrode exhibits better electrochemical behavior due to the high synergistic effect of ternary metal oxide compared with bimetal oxide. To improve the practical applicability of ASC device, we assembled the device for better flexibility, also demonstrating the extensive advantages and accessibility.

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Anode Glow Discharge Electrolysis Synthesis of Flower‐Like α‐MnO₂ Nanospheres: Structure, Formation Mechanism, and Supercapacitor Performance

Yu,

Liu,

Wang

et al. 2024

ChemSusChem

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A novel green synthesis strategy–anode glow discharge electrolysis (AGDE) was employed for one‐step preparation of α‐MnO2 in 2 g L−1 KMnO4 solution, in which Pt needle and carbon rod were regarded as anode and cathode, respectively. The optimal preparation condition is 400 V for 60 min and the power consumption is below 45 W. The XRD, Raman spectra, XPS and EPR proved that α‐MnO2 with structural defects (oxygen vacancies) is obtained. SEM and TEM revealed that α‐MnO2 shows a flower‐like nanospheres with a diameter of 165 nm, which is assembled by many nanosheets. A possible formation mechanism is that the MnO2 is generated via the reduction of MnO4− by H⋅ and eaq− in plasma‐liquid interface. Electrochemical test found that MnO2 nanospheres exhibit a specific capacitance of 365 F g−1 at 1 A g−1, and capacity retention of 79.8 % after 10,000 cycles at 5 A g−1. The assembled asymmetric supercapacitor shows the maximum energy density of 23.1 Wh kg−1 at power density of 1.89 kW kg−1. In brief, AGDE is a simple, facile and green technique for the synthesis of α‐MnO2 without adding extra chemicals, and prepared α‐MnO2 can be considered as an excellent candidate of electrode materials for supercapacitor.

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Synthetic Strategy for MnO₂ Nanoparticle/Carbon Aerogel Heterostructures for Improved Supercapacitor Performance

Cited by 8 publications

References 51 publications

Exchanging interlayer anions in NiFe-LDHs nanosphere enables superior battery-type storage for high-rate aqueous hybrid supercapacitors

Exchanging interlayer anions in NiFe-LDHs nanosphere enables superior battery-type storage for high-rate aqueous hybrid supercapacitors

Carbon-Embedded Ru/NiO-CuO Cathode and rGO/α-Co₃O₄ Anode for Synergetic Charge Transfer for High-Performance Solid-State Asymmetric Supercapacitors

Anode Glow Discharge Electrolysis Synthesis of Flower‐Like α‐MnO₂ Nanospheres: Structure, Formation Mechanism, and Supercapacitor Performance

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Synthetic Strategy for MnO2 Nanoparticle/Carbon Aerogel Heterostructures for Improved Supercapacitor Performance

Cited by 8 publications

References 51 publications

Exchanging interlayer anions in NiFe-LDHs nanosphere enables superior battery-type storage for high-rate aqueous hybrid supercapacitors

Exchanging interlayer anions in NiFe-LDHs nanosphere enables superior battery-type storage for high-rate aqueous hybrid supercapacitors

Carbon-Embedded Ru/NiO-CuO Cathode and rGO/α-Co3O4 Anode for Synergetic Charge Transfer for High-Performance Solid-State Asymmetric Supercapacitors

Anode Glow Discharge Electrolysis Synthesis of Flower‐Like α‐MnO2 Nanospheres: Structure, Formation Mechanism, and Supercapacitor Performance

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Synthetic Strategy for MnO₂ Nanoparticle/Carbon Aerogel Heterostructures for Improved Supercapacitor Performance

Carbon-Embedded Ru/NiO-CuO Cathode and rGO/α-Co₃O₄ Anode for Synergetic Charge Transfer for High-Performance Solid-State Asymmetric Supercapacitors

Anode Glow Discharge Electrolysis Synthesis of Flower‐Like α‐MnO₂ Nanospheres: Structure, Formation Mechanism, and Supercapacitor Performance