Defects engineering in metal oxides for gas sensing and electromagnetic wave absorption

Du, Wenjing; Zhang, Xue; Wu, Lili; Wang, Zhou; Liu, Wei; Liu, Jiurong; Wang, Fenglong

doi:10.1016/b978-0-323-85588-4.00021-0

Cited by 2 publications

(3 citation statements)

References 142 publications

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“…Thus, the concentration of electrons will increase. 95 The flat band potentials of MnO 2 , Ag 0.05 MnO 2 , and Ag 0.15 MnO 2 are 0.042 V, À0.07 V, and À0.04 V respectively. The charge carrier densities of MnO 2 , Ag 0.05 MnO 2 and Ag 0.15 MnO 2 are given in Table 1.…”

Section: Materials Advances Papermentioning

confidence: 95%

Electrochemical performance enhancement of MnO₂ nanowires through silver incorporation for next-generation supercapacitors

Khalid,

Zulfiqar,

Khan

et al. 2024

Mater. Adv.

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Section: Materials Advances Papermentioning

confidence: 95%

Electrochemical performance enhancement of MnO₂ nanowires through silver incorporation for next-generation supercapacitors

Khalid,

Zulfiqar,

Khan

et al. 2024

Mater. Adv.

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“…When oxygen vacancies are produced, electrons would be left behind. Consequently, the charge carrier (electrons) concentration would increase . Thus, the p-type material is changed to n-type material with doping .…”

Section: Mott–schottky Studiesmentioning

confidence: 99%

“…Consequently, the charge carrier (electrons) concentration would increase. 66 Thus, the p-type material is changed to n-type material with doping. 67 These results are well consistent with the previous literature.…”

Section: Mott−schottky Studiesmentioning

confidence: 99%

Investigating the Influence of Sodium Preintercalation on the Electrochemical Behavior of Ultrathin MnO₂ Nanowires for Enhanced Supercapacitor Performance

Khalid,

Zulfiqar,

Warsi

et al. 2024

Energy Fuels

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We have successfully synthesized bare and Na+ preintercalated MnO2 nanowires (NWs) (Na x MnO2, x = 0.05, 0.1, and 0.15) using a facile hydrothermal method. Supercapacitors are the state-of-the-art technology to overcome the global energy crisis, owing to their fast charging/discharging rates and higher power density. One-dimensional morphology (nanorods, nanowires, etc.) boosts the inherent low conductivity of transition metal oxides including MnO2 by confining charge transport only in one direction. Here, we have preintercalated Na+ ions into MnO2 nanowires (NWs) as a conductivity booster as well as a tunnel-stabilizing agent for α-MnO2. Morphological analysis reveals that nanowires have <50 nm diameter and their surface gets cracked with Na+ preintercalation, offering a less dead area. Linear sweep voltammetry (LSV) results revealed an increase in oxygen evolution overpotential by Na+ preintercalation, which can enable the supercapacitor to operate at an extended potential window. Na+ preintercalation and control on morphology not only increased the conductivity but also shielded the electrode pulverization against tedious charging/discharging cycles and reduced the electrolyte diffusion pathway. These features enabled Na0.10MnO2 NWs to exhibit a specific capacitance of 1061 F g–1@1 A g–1 and an excellent rate capability of 85.6% at 9 A g–1 along with 95.9% capacitance retention after 6000 charging–discharging cycles at 12 A g–1 current density. This study showed that Na+ preintercalation in MnO2 could improve the electrochemical performance and open up new horizons to manufacture high-performance next-generation supercapacitors.

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Defects engineering in metal oxides for gas sensing and electromagnetic wave absorption

Cited by 2 publications

References 142 publications

Electrochemical performance enhancement of MnO₂ nanowires through silver incorporation for next-generation supercapacitors

Electrochemical performance enhancement of MnO₂ nanowires through silver incorporation for next-generation supercapacitors

Investigating the Influence of Sodium Preintercalation on the Electrochemical Behavior of Ultrathin MnO₂ Nanowires for Enhanced Supercapacitor Performance

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Defects engineering in metal oxides for gas sensing and electromagnetic wave absorption

Cited by 2 publications

References 142 publications

Electrochemical performance enhancement of MnO2 nanowires through silver incorporation for next-generation supercapacitors

Electrochemical performance enhancement of MnO2 nanowires through silver incorporation for next-generation supercapacitors

Investigating the Influence of Sodium Preintercalation on the Electrochemical Behavior of Ultrathin MnO2 Nanowires for Enhanced Supercapacitor Performance

Contact Info

Product

Resources

About

Electrochemical performance enhancement of MnO₂ nanowires through silver incorporation for next-generation supercapacitors

Electrochemical performance enhancement of MnO₂ nanowires through silver incorporation for next-generation supercapacitors

Investigating the Influence of Sodium Preintercalation on the Electrochemical Behavior of Ultrathin MnO₂ Nanowires for Enhanced Supercapacitor Performance