Enhanced supercapacitor performance of Bi2O3 by Mn doping

Bismuth Manganese Catalysts for Soot Oxidation in Diesel Engine Exhaust: Effect of Preparation Methods on Active Oxygen Species

“…As depict in Table 2, the ratio of O abs /O latt obey R−Mn 3 BiO y (1.70)>H−Mn 3 BiO y (1.56)>Cop−Mn 3 BiO y (0.46), indicating that the R−Mn 3 BiO y catalyst prepared by hydrolysis‐driven redox has more oxygen vacancies and active oxygen species. The increase of oxygen vacancies is not unexpected, since the stable state of Mn is MnO 2 , but in Bi 2 O 3 lattice, it is forced to be MnO 1.5 , which is equivalent to creating a 0.5 oxygen loss in structure when Mn III converts to Mn IV under perturbation [23] . The increase of oxygen vacancies and reactive oxygen species largely determines the catalytic performance of the catalyst.…”

“…The increase of oxygen vacancies is not unexpected, since the stable state of Mn is MnO 2 , but in Bi 2 O 3 lattice, it is forced to be MnO 1.5 , which is equivalent to creating a 0.5 oxygen loss in structure when Mn III converts to Mn IV under perturbation. [23] The increase of oxygen vacancies and reactive oxygen species largely determines the catalytic performance of the catalyst. H 2 À TPR is a powerful tool for studying the redox ability of catalysts.…”

Facile microwave‐assisted synthesis of Ce‐doped Bi2O3 for efficient hybrid supercapacitors

“…Nevertheless, the inherent drawback of Bi 2 O 3 consists of inferior electrical conductivity and cycling stability, which limits its further applications. [16][17][18] Conductive materials such as carbon-based materials, have proven to be suitable as buffer layers to effectively reduce the volume change of Bi 2 O 3 , protect the electrode structure, and enhance the cycling stability. In addition, carbon material, being highly conductive, serves as the pathway for electron transfer, ensuring rapid electron transfer and enhancing the reversible specific capacitance.…”

“…Among them, Bi 2 O 3 becomes an ideal material for HSCs anode with the advantages of abundant raw materials, environmental friendliness as well as high theoretical capacity. Nevertheless, the inherent drawback of Bi 2 O 3 consists of inferior electrical conductivity and cycling stability, which limits its further applications 16–18 . Conductive materials such as carbon‐based materials, have proven to be suitable as buffer layers to effectively reduce the volume change of Bi 2 O 3 , protect the electrode structure, and enhance the cycling stability.…”

Chemical Synthesis of Bismuth Oxide and Its Ionic Conversion to Bismuth Sulphide for Enhanced Electrochemical Supercapacitor Energy Storage Performance

“…10 Recently, Yixian et al, obtained Mn-doped Bi 2 O 3 nanorods via a soft chemical method that produced an SC of 1295.6 F g −1 at a current density of 1 A g −1 , furthermore, an energy density of 149.25 Wh kg −1 and a high power density of 864 W kg −1 , the stability retention reached to 98% retention after 5000 cycles. 11 In recent work, Peter et al, endowed the Bi 2 S 3 and Bi 2 S 3 /multi-walled carbon nanotubes for supercapacitor and solar cell applications that documented an SC of 133 F g −1 at 1 A g −1 in 0.5 M of Na 2 SO 4 with capacitance retention of about 80% even after 3000 redox cycles. 12 Balaji et al, obtained Bi 2 O 3 -GO nanocomposite electrode material via microwave-oven-assisted carbonization method which produced an SC of 1250 F g −1 with exceptional cyclability of 80% after 5000 cycles at 1 A g −1 .…”