Date of Award


Degree Name

Master of Science


Mechanical Engineering


Chintalapalle V. Ramana


Limited fossil fuel, increasing population, pollution, and climate change are motivating society to use renewable and clean energy techniques. However, the intermittent nature of renewable sources hinders their continuous availability and use. Energy storage devices such as supercapacitors and batteries are essential for sustainable development but their high cost limits its bulk use. The cost of energy storage devices mainly depends on materials, synthesis process and device fabrication. Therefore, low cost 3-D mesoporous nickel germanium fictionalize nickel oxides electrode materials has been developed by using facile fabrication techniques for supercapacitor application. 3-D mesoporous nickel provides the high surface area and enhances the ionic conductivity, germanium functionalization improves the electrical conductivity and reduces the charge transfer resistance of nickel oxides. Germanium fictionalization demonstrates the improvement in specific capacitance of nickel oxides by more than twice. The asymmetric supercapacitor shows the specific capacitance of 36 mFcm-2, energy density of 2.5 µWhcm-2, and power density of 0.67 mWcm-2. The digital watch powered by germanium functionalized nickel oxides and activated carbon-based asymmetric supercapacitor shows practical application of the device.




Received from ProQuest

File Size

79 p.

File Format


Rights Holder

Cristina Gonzalez