HYBRID EVENT: You can participate in person at Orlando, USA or Virtually from your home or work.

6th edition of World Nanotechnology Conference

April 24-25, 2023

April 24 -26, 2023 | Orlando, USA
World Nano 2023

Siddhant Srivastav

Siddhant Srivastav, Speaker at World Nanotechnology conference
Malaviya National Institute of Technology, India
Title : Mn3O4 assimilated Broccoli-Flower like Nickel Manganese Selenide Composite for Ultra- efficient Solid-State Hybrid Supercapacitors


Innovative renewable energy sources for energy storage/conversion is the demand of the current scenario in electrochemical machinery. In this context, choosing suitable organic precipitants for tuning the crystal characteristics and microstructures is a challenge. Moreover, simple method which employ non- toxic solvent are of prime significance to prepare novel nanostructured materials in the energy storage applications. With the same notion, herein we report broccoli flower-like porous Mn3O4/NiSe2−MnSe2 composite synthesized using a simple two step hydrothermal synthesis procedure assisted by sluggish precipitating agent and an effective cappant followed by intermediated anion exchange. The as-synthesized material was exposed to physical and chemical measurements depicting significant crystallinity, stronger bonding and broccoli flower-like porous arrangement. The material was assessed electrochemically by cyclic voltammetry (CV), chronopotentiometry (CP) and electrochemical impedance spectroscopy (EIS) measurements. The Electrochemical studies reveal redox behavior, supercapacitive charge-discharge shape and extremely low charge transfer resistance with very low relaxation time constant. Further, the fabricated Mn3O4/NiSe2−MnSe2 composite (as positive electrode material) based solid-state hybrid supercapacitor (Mn3O4/NiSe2−MnSe2 ||N-rGO) delivers excellent rate specific capacity/capacitance, very low internal resistance, very low relaxation time constant, with energy density (~34 W h kg–1) of a typical rechargeable battery and power density (11995 W kg–1) of an ultra-supercapacitor. Consequently, it can be a favorable contender for supercapacitor applications for high performance energy storage utilizations. A definitive exhibition of the supercapacitor device is credited to ² electrolyte-ion repository ² alike behaviour of broccoli flower like Mn3O4/NiSe2−MnSe2, enhanced by upgraded electronic and ionic conductivities of N-doped rGO (negative electrode) and PVA/KOH gel (electrolyte separator), respectively.

Audience take away: 

  • From this presentation audience will learn new and easy synthesis of transition metal selenides.
  • The assembling of solid state hybrid supercapacitors will be demonstrated.
  • A new and growing field to explore for researcher and academicians.
  • Provides practical solution to the energy storage problems.
  • Will improve the design of available solid state hybrid supercapacitors.


Siddhant Srivastav is a research scholar in department of chemistry at the Malaviya National Institute of Technology Jaipur. He received a bachelor’s degree from Lucknow University and a master’s degree (M.Sc. in Chemistry) from Malaviya National Institute of Technology Jaipur with excellent academic achievements. He is currently working under supervision of Dr. Sumanta Kumar Meher and is focusing on synthesis of Transition metal chalcogenides and their heteronanocomposites with 2D conducting substrates for electrochemical energy storage applications. He has presented in three international conferences within India and got best poster award in ICNBL-2019. He has published an article in ACS Langmuir.