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Dr. Nagmani

Project Scientist at Department of Sustainable Energy Engineering, Indian Institute of Technology Kanpur. Ph.D. from School of Energy Science and Engineering, Indian Institute of Technology Kharagpur

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Showing posts from July, 2026

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Cracking the Hard Carbon Mystery: Study Unveils How Lithium, Sodium and Potassium Ions Are Stored in a Single Carbon Architecture

Posted by Poonam Sinha on July 14, 2026

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Greener Low-solvation Electrolyte Solvent Based Electrolyte Enables High-Efficiency Hard Carbon Anodes for Wide-Temperature Sodium-Ion Batteries

Posted by Poonam Sinha on July 14, 2026

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Convocation: Gold Medalist with Hon'ble President of India

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The Future of mobility is Electric (e-Mobility) for sustainable eco-system: Sodium-Ion Battery ( A Technology Beyond Lithium-Ion Battery)

Introduction to electric mobility – Battery on wheels Electric mobility in the 21 st century by Nagmani Transportation and vehicular mobility have been significant aspects of modern civilization, ensuring connectivity and facilitating socio-economical development. The majority of automobiles on the road today run with conventional fossil fuels like gasoline and diesel . In an Internal Combustion Engine (ICE), incomplete combustion results in greenhouse gas (GHG) emissions contributing to 25% of the total GHG emissions worldwide. As the global consensus grew, green and sustainable alternatives emerged towards the electrification of transportation sectors worldwide. However, electric vehicles (EVs) are historically older technologies as compared to ICE-based automobiles. 1 Battery-powered cars first appeared in the early 1800s, followed by electrified locomotives in the 1830s. 2 Patents were granted in England and America in 1840 and 1847 to use electrified rails. 3 ...

Low-cost and sustainable micro/mesoporous hard carbon derived from Jute-waste for promising high-performance Sodium and Potassium-ion batteries with distinct storage mechanism

Langmuir : (IF = 4.331 ); Publication Date: 09 December 2022 DOI: https://doi.org/10.1021/acs.langmuir.2c02575 Author(s): Nagmani , Prakhar Verma , and Sreeraj Puravankara Abstract Hard carbon (HC) remains the most viable choice as a negative electrode for sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs) owing to its higher energy density (discharge up to zero volts), higher capacity (distinct storage mechanisms), and cycling stability. Herein, a biomass jute fiber precursor HC anode (JPC) with varying porosity is reported for the first time as a low-cost and sustainable high-performance HC anode for SIBs and PIBs. Direct carbonization results in micro-meso porous HC (JPC-D), and micro-wave pretreated jute fiber results in ultramicroporous HC (JPC-M). The mesoporosity generated in JPC-D during synthesis outperforms the ultramicroporous JPC-M with a high reversible capacity of 328 mAh g –1 (iCE = 66%) at a...

Breakthrough in Sodium-Ion Battery Technology: Unmodified Hard Carbon Anode with High Capacity of 422 mAh/g and Energy Density Unveiled

Date: 16-02-2024 Researchers from the Indian Institute of Technology Kharagpur have achieved a significant breakthrough in sodium-ion battery technology with their work published in the prestigious international blind peer-reviewed journal Chemical Communication by The Royal Society of Chemistry. The study introduces micro-spherical hard carbons (MSHCs) with distinctive porosity features, synthesized through an innovative microwave-assisted solvothermal pre-treatment of sucrose, followed by carbonization. These MSHCs exhibit exceptional properties, including large interlayer spacing of turbostratic graphene nanosheets, hierarchical pore structures, and closed pores, resulting in outstanding performance as anodes for sodium-ion batteries. With a high reversible capacity of 422 mA h/g at a 0.1C rate and outstanding capacity retention of 84% after 500 cycles at 1C, the MSHC sets a new standard for sodium storage performance. Further analyses reveal a mechanism shift from intercalation t...

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