This study synthesized α-Zn2V2O7 nanopowders using a hydrothermal approach followed by annealing treatment. The resulting powders were then mixed with multi-walled carbon nanotubes and electrochemically characterized as new nanocomposite electrodes for supercapacitors. The structure and surface morphology of the powders were characterized by X-ray diffraction, transmission electron microscopy, and scanning electron microscopy. Plus, the capacitive behavior of the composite electrodes was evaluated by cyclic voltammetry and galvanostatic charge-discharge cycles in different molar aqueous KCl solutions. The α-Zn2V2O7/multi-walled carbon nanotube composite electrodes were prepared using three different ratios and screened for their use in supercapacitors. As a result, the α-Zn2V2O7/multi-walled carbon nanotube composite electrode with a 1 : 2 ratio was identified as the best electrode with a specific_x000D_ capacitance value of 44.8 F g-1 in 0.5M KCl. Notwithstanding, all the tested composite electrodes demonstrated an excellent cycle stability and showed a less than 4% change in their specific capacitance values when compared to the initial values.

Nano Zinc Pyrovanadate Carbon Nanotubes Composite Electrode Aqueous Electrolyte

Burke A, J. Power Sources, 91(1), 37 (2000)
Conway BE, Electrochemical supercapacitors: Scientific fundamentals and technological applications, Kluwer Academic/Plenum Publisher, New York (1999).
Lee BJ, Sivakkumar SR, Ko JM, Kim JH, Jo SM, Kim DY, J. Power Sources, 168(2), 546 (2007)
Shan Y, Gao L, Mater. Chem. Phys., 103(2-3), 206 (2007)
Arabale G, Wagh D, Kulkarni M, Mulla IS, Vernekar SP, Vijayamohanan K, Rao AM, Chem. Phys. Lett., 376(1-2), 207 (2003)
Prasad KR, Miura N, Electrochem. Commun., 6, 1004 (2004)
Lee MT, Chang JK, Hsieh YT, Tsai WT, J. Power Sources, 185(2), 1550 (2008)
Kim BC, Wallace GG, Yoon YI, Ko JM, Too CO, Synth. Met., 159, 1389 (2009)
Wohlfahrt-Mehrens M, Schenk J, Wilde PM, Abdelmula E, Axmann P, Garche J, J. Power Sources, 105(2), 182 (2002)
Wang GX, Qu MZ, Yu ZL, Yuan RZ, Mater. Chem. Phys., 105(2-3), 169 (2007)
Kalpana D, Omkumar KS, Kumar SS, Renganathan NG, Electrochim. Acta, 52(3), 1309 (2006)
Zhang Y, Sun X, Pan L, Li H, Sun Z, Sun C, Tay BK, J. Alloy. Compd., 480, 17 (2009)
Jayalakshmi M, Palaniappa M, Balasubramanian K, Int. J. Electrochem. Sci., 3, 96 (2008)
Lee HY, Goodenough JB, J. Solid State Chem., 148, 81 (1999)
Naydenov A, Mehandjiev D, Compt. Rend. Acad. Bulg. Sci., 46, 49 (1993)
Bliznakov GM, Mehandjiev DR, Kinet. Catal., 28, 116 (1987)
Baricevic AT, Grbic B, Jovanovic D, Angelov S, Mehandjiev D, Marinova C, Stefanov PK, Appl. Catal., 47, 145 (1989)
Mehandjiev DR, Dimitrova IP, Compt. Rend. Acad. Bulg. Sci., 42, 71 (1989)
Angelov S, Mehandjiev DR, Piperov B, Zarkov V, Baricevic AT, Jovanovic D, Jovanovic Z, Appl. Catal., 16, 431 (1985)
Dyakova E, Baricevic AT, Mehandjiev D, Zhecheva E, Grbic B, Kinet. Catal. Lett., 43, 521 (1991)
Gopal R, Calvo C, Can. J. Chem., 51, 1004 (1973)
Schindler M, Hawthorne FC, J. Solid State Chem., 146, 271 (1999)
Zavalij PY, Zhang F, Whittingham MS, Acta Crystallogr. Sect. C-Cryst. Struct. Commun., 53, 1738 (1997)
Abraham SD, David ST, Bennie RB, Joel C, Seethamahalakshmi M, Adinavven T, Chem. Sci. Transactions, 3(4), 1488 (2014)
Jayalakshmi M, Rao MM, Venugopal N, Kim KB, J. Power Sources, 166(2), 578 (2007)
Liu XJ, Osaka T, J. Electrochem. Soc., 144(9), 3066 (1997)