**2. Conclusion**

This chapter converses several properties of thin film influencing their electrochemical performance such as cyclability, energy and power density and so on. Author have performed the comparison studies of two class of energy storage mechanism between supercapacitor and supercapbatteries have been considered to improve large potential window in solid state electrolyte as well as aqueous electrolytes. Flexible thin film supercapbatteries employing with the help of PLD system are expected to exhibit good electrochemical redox activity to deliver high voltage window yet showing a better stability in a post annealed temperature conditions. The thin film supercapbatteries consisting of Tungsten trioxide and vanadium pentoxide has to be a potentially interesting flexible thin film based device, that is simple, low cost, portable and eco friendly. There are no draw backs as the electrode materials because the fabricated electrode materials delivered better *Physicochemical Approaches for Thin Film Energy Storage Devices through PVD Techniques DOI: http://dx.doi.org/10.5772/intechopen.99473*

cycling stability in a different bent position and both materials having good electrical conductivity. Thus, WO3 and V2O5 thin film electrodes are promising candidate for flexible thin film energy storage applications and numbers of surveys are highly acceptable to discover the potential of these thin film energy storage materials with highly adhesive film fabrication methods.

## **Acknowledgements**

Authors would like to acknowledge the Director, CSIR-CECRI, AcSIR Ghaziabad. RV would like to thank Dr. M Ulaganathan shared his fruitful knowledge during TFSC device fabrication. RV would like to thank his funding agency CSIR-HRDG in a CSIR-SRF [File No:30/020(0170)] fellowship scheme.
