Himadri RahaOLA Electric · Battery Innovation Centre
Dry electrode process for Li-ion battery.
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Himadri did his Ph.D. from IIT Kharagpur. He is currently associated with the School of Nano Science and Technology, IIT Kharagpur as a Senior Project Scientist. His research is focused on nanomaterial based capacitive energy storage devices and printable electronics.
January 2017 - present
- I am doing my PhD research work mainly focused on capacitive energy storage (especially supercapacitor). Here I am working on both electrode materials and in-plane device fabrication.
This work reports an in-situ, one-step hydrothermal preparation procedure of a binder-free electrode growth of Ni 6 Se 5 on nickel foam (Ni 6 Se 5 /NF) with a rod-like structure. Ni 6 Se 5 is an enveloped transition metal chalcogenides of formula M (n+1) X n (where 2≤n≤8, M is a transition metal and X is chalcogen) of the nickel selenide family. Th...
In order to facilitate higher stability and fast charging of the energy storage devices, it is also essential to increase their coulombic efficiency. The most common approaches to increase the coulombic efficiency are by either (i) introducing the capacitive behaviour or (ii) tuning parasitic electrochemical reactions in batteries. Here we demonstr...
With the advancement of society, net energy consumption is increasing exponentially. Although the inception of nuclear and renewable energy reduces the proportion of use of fossil fuels by around 15%, still consumption of fossil fuels has increased many folds in the last hundred years. The increased use of fossil fuels is solely responsible for the...
Rapidly changing demand on energy storage systems makes it essential to redesign the device architecture and materials required to fabricate the devices. It is crucial to introduce capacitive behaviour in a conventional energy storage device (batteries) to improve the lifetime and power efficiency of the hole energy storage system. The charge stori...
Telescopic view towards next generation electronics predicts flexible and portable devices. Even the available advanced technologies for flexible displays, CPUs and required circuitry are not enough to develop an all-flexible mobile electronic device, due to the underperforming flexible energy storage. Efficient energy storage should have these fea...
With the recent trend of rampant development of modern portable electronic devices, their power requirement is changing rapidly, and so it is indispensable to redefine their energy storage systems from all the aspects of science and technology. The new age energy storage devices should store an ample amount of electronic charge even with fast charg...
A forest like 3D carbon structure formed by RGO was prepared to use as electrode material for highly power efficient supercapacitor. To improve the specific energy of the electrode, pore like defects were incorporated on the RGO forests by atomic oxygen etching, during the UV-ozone treatment. The modified surface helps to increase the net capacitan...
This paper presents a density functional theory-based first principle study to investigate the atomic-scale interactions of formaldehyde (H <sub xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> CO) molecules with different oxygen containing functional groups of graphene oxide to identify which particular functional group possesses better adsorpti...
SnO2 hollow sphere and solid sphere composed of SnO2 nanoparticles was synthesised by reaction between hydrated stannic chloride (SnCl4. 5H2O) and sodium hydroxide (NaOH) under high pressure and temperature i.e. by hydrothermal process, both of the material has bandgap 3.6 eV. Graphene oxide (GO) had been synthesised by modified hummers method and...
Capacitance of electrochemical capacitors generally represented in relative scale, i.e. the units are represented either related to electrode area or the mass of active material. In most of the cases the cell capacitance does not varies linearly with the mass loading and the electrode area. So, for a same material low mass loading often gives much higher gravimetric specific capacitance. And for a fixed electrode area a same electrode material gives higher areal specific capacitance for higher mass loading.
I am looking for your suggestion for this, that what should I do to overcome these ambiguity. Before representation should I find out the highest possible cell capacitance by varying the mass loading on fixed electrode area?