New Synthesis Method for a Core-Shell Composite Based on α-Bi2O3@PPy and its Electrochemical Behavior as Supercapacitor Electrode

Abstract

New composite based on polypyrrole (PPy) and bismuth oxide (α-Bi 2 O 3) was investigated as supercapacitor electrode. The α-Bi 2 O 3 was obtained by hydrothermal route at 500 o C for 2 h. Cyclic voltammetry was used to electropolymerize PPy on graphite electrode (GE) or on GE/α-Bi 2 O 3. The X-ray diffraction profile of Bi 2 O 3 revealed the α-Bi 2 O 3 monoclinic structure with space group P2 1 /c. The scanning and transmission electron microscopy images showed that PPy coated α-Bi 2 O 3. Raman spectra showed that PPy inhomogeneously coated α-Bi 2 O 3 , but it was still possible to obtain a α-Bi 2 O 3 @PPy core-shell hybrid composite with highly ordered α-Bi 2 O 3 with electronic interaction between the oxide and the polymer chain of the polymer. The GE/α-Bi 2 O 3 @PPy composite electrode (type I supercapacitor) displayed a predominantly capacitive profile with low impedance values and good electrochemical stability after 50 charge and discharge cycles. The specific capacitance of α-Bi 2 O 3 @PPy composite was found in the range of 634 to 301 F g-1 to gravimetric current of 3 and 10 A g-1 , respectively.

Bi2O3@Bi2O2CO3 Heterostructure Electrode for Significant Enhancement of Electrochemical Capacity

“…However, the replacement of metal monomers from oxides is accompanied by large volume changes, resulting in irreversible capacitance losses, as well as poor inherent conductivity and poor ion diffusivity, making the capacitance of Bi 2 O 3 much lower than the theoretical value . To ameliorate these problems, some works have compounded Bi 2 O 3 with other materials (e.g., graphene, MnO 2 , and PPy) − or growing Bi 2 O 3 directly onto collectors (e.g., nickel foam and BC). , Despite considerable progress, it is still challenging to optimize the structural properties of Bi 2 O 3 to improve its electrochemical performance …”

Characterization of Bismuth Trioxide Nanoparticles and Evaluating Binding Affinity with Proteins

“…In the range of 25 °C to 730 °C, α‐Bi 2 O 3 is the most stable phase thermodynamically [41] . With such unique properties, nano bismuth oxide has broad applications as a photo‐catalyst, gas sensing anti‐reflective coating, in photo‐voltaic cells, fuel cells, optoelectronics devices, high‐temperature superconductors, electrochromic devices, super‐capacitors, ceramic glass manufacture, and biomedicine [38,41,43–45] . Additionally, Bi 2 O 3 photo‐catalyst is considered to be safe, non‐toxic, and non‐carcinogenic [41] .…”

“…[41] With such unique properties, nano bismuth oxide has broad applications as a photocatalyst, gas sensing anti-reflective coating, in photo-voltaic cells, fuel cells, optoelectronics devices, high-temperature superconductors, electrochromic devices, super-capacitors, ceramic glass manufacture, and biomedicine. [38,41,[43][44][45] Additionally, Bi 2 O 3 photo-catalyst is considered to be safe, non-toxic, and non-carcinogenic. [41] Bi 2 O 3 is a standard metal oxide utilized in heavy metal ion determination in drinking water, mineral water, urine and as an astringent in medicinal and topical creams.…”