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An overuse of conventional fossil fuels poses a threat to our climate, which has inspired a shift to clean, renewable energy resources along with research on the development of devices that can efficiently harness and store energy from such sources.

One such device is the supercapacitor, which is often hailed as the next-generation energy storage device owing to its attractive properties such as fast charging and discharging, long cycle life, high delivery capability, and a wide range of operable temperature (−40°C to 70°C). However, a major issue with supercapacitors is their poor energy density, with current commercial supercapacitors having far lower energy densities than lithium-ion batteries.

For a high-performance supercapacitor, an electrode material with large capacitance and wide potential window are necessary. Graphene-based electrodes are particularly attractive in this regard. However, an electrode composed of restacked graphene sheets has reduced surface area and, therefore, efficiency.

Now, we propose a one-step, low-cost protocol for the greener synthesis of nitrogen doped reduced graphene oxide, the electrode material that exhibits high energy density and consists of environment-friendly electrolytic components. The product is also scalable and could replace currently available activated carbon supercapacitors as energy/hydrogen storage devices.



Professor Anil

About Professor Anil Kumar

Dr. Anil Kumar is an Emeritus Professor at the Department of Chemistry, Indian Institute of Technology Roorkee (IITR), India. He received his Ph.D. in Chemistry from the University of Roorkee in 1977. His main research interests include nanomaterial chemistry and nanotechnology. As a senior researcher, he has 98 papers, with 67 of them in nanotechnology, and over 1800 citations to his credit.

About the Patent

The growing demand for renewable energy resources has created a need for efficient energy storage devices. Among these devices, supercapacitors have garnered much attention owing to their high power delivery capabilities, long cycle life, wide operational temperature range, and fast charging/discharging. However, they suffer from limitations like poor energy density. Now, we provide a low-cost greener wet synthesis of nitrogen-doped reduced graphene oxide for designing a high-performance supercapacitor employing environment-friendly electrolytic components.


Prof. Himanshu Joshi,
Prof. Anil Kumar,
Dr. Ajay Kumar
Synthesis of iron oxide nanohybrids (maghemite phase) employing raw spent wash from disllery industry as a precursor material. Granted - Indian Patent No. 340010 (30th June 2020).
Prof. Anil Kumar,
Dr. Sahil Thareja
A Method for Synthesis of Nitrogen-Doped Reduced Graphene Oxide (N-rGO) for High Performance Supercapacitor. Indian patent applicaon No.201811031021, FER Reply sent on 31st March 2021.
Mr. Atul Kumar,
Prof. Anil Kumar,
Prof. G.D. Varma
An Ultrafast Resisve Type Humidity Sensor Based on Nanohybrids. Filing of Complete Specificaon (Indian Patent applicaon no. 202011007304/ Published on 11th June 2021.