Effects of Sn doping on capacitive performance of σ-MnO2 on the high operating temperatures
Abstract
The Sn-doped σ-MnO2 (Sn-MnO2) hollow structures was successfully prepared via a chemical process at room temperature (25∘C). Compared to pure MnO2, Sn-MnO2 shows an obviously enhanced capacitance and outstanding cycling performance at high operating temperature of 85∘C. For Sn-MnO2, the specific capacitance (Cs) of 169.9Fg-1 at current density of 1Ag-1 was measured at 85∘C and retains over 90% of its initial capacitance after 1000 cycles. Meanwhile, the electrochemical properties of Sn-MnO2 were investigated on different temperatures (25∘C, 45∘C, 65∘C and 85∘C), and an improved capacitive performance was obtained with the temperature increasing.
- Publication:
-
Functional Materials Letters
- Pub Date:
- 2018
- DOI:
- 10.1142/S1793604718500078
- Bibcode:
- 2018FML....1150007L
- Keywords:
-
- σ-MnO<SUB>2</SUB>;
- hollow structure;
- high temperature;
- supercapacitor;
- Sn doping