1. Jilin Supercapacitor Engineering Laboratory
2. College of Physics
3. Jilin University
4. Changchun City 130012
5. P. R. China
6. Institute of Power Engineering
7. National Research Tomsk Polytechnic University
8. Tomsk
9. Russian Federation
10. Faculty of Radiophysics
11. National Research Tomsk State University
12. Tomsk 634050
13. State Key Lab of Inorganic Synthesis and Preparative Chemistry
14. Changchun 130012