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Dive into the research topics where Gautam G. Yadav is active.

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Featured researches published by Gautam G. Yadav.


Nature Communications | 2017

Regenerable Cu-intercalated MnO2 layered cathode for highly cyclable energy dense batteries.

Gautam G. Yadav; Joshua W. Gallaway; Damon E. Turney; Michael Nyce; Jinchao Huang; Xia Wei; Sanjoy Banerjee

Manganese dioxide cathodes are inexpensive and have high theoretical capacity (based on two electrons) of 617 mAh g−1, making them attractive for low-cost, energy-dense batteries. They are used in non-rechargeable batteries with anodes like zinc. Only ∼10% of the theoretical capacity is currently accessible in rechargeable alkaline systems. Attempts to access the full capacity using additives have been unsuccessful. We report a class of Bi-birnessite (a layered manganese oxide polymorph mixed with bismuth oxide (Bi2O3)) cathodes intercalated with Cu2+ that deliver near-full two-electron capacity reversibly for >6,000 cycles. The key to rechargeability lies in exploiting the redox potentials of Cu to reversibly intercalate into the Bi-birnessite-layered structure during its dissolution and precipitation process for stabilizing and enhancing its charge transfer characteristics. This process holds promise for other applications like catalysis and intercalation of metal ions into layered structures. A large prismatic rechargeable Zn-birnessite cell delivering ∼140 Wh l−1 is shown.


Journal of Materials Chemistry | 2017

A conversion-based highly energy dense Cu2+ intercalated Bi-birnessite/Zn alkaline battery

Gautam G. Yadav; Xia Wei; Jinchao Huang; Joshua W. Gallaway; Damon E. Turney; Michael Nyce; Jeff Secor; Sanjoy Banerjee

Manganese dioxide (MnO2)–zinc (Zn) batteries are cheap and environmentally benign and have sufficient theoretical energy density to be used as an energy storage device for the grid; however, they have been relegated to primary systems, where the complete energy is delivered in a single discharge, due to the irreversibility of their active materials. Until recently, rechargeable MnO2–Zn batteries have only been able to cycle ∼10% of MnO2s theoretical 2-electron capacity (617 mA h g−1), thus delivering significantly reduced energy density. In a recent paper from our group, we reversibly accessed the full theoretical 2-electron capacity of MnO2 for >6000 cycles by using a layered polymorph of MnO2 mixed with bismuth oxide (Bi2O3) called Bi-birnessite (Bi–δ-MnO2) intercalated with Cu2+ ions. This discovery highlighted the possibility of achieving very high energy densities from inexpensive aqueous batteries; however, a full-cell demonstration with Zn as the anode was not studied. Here we report for the first time the effect of Zn anodes on the cycle life and energy density of a full cell, where we observe that 15% depth-of-discharge (DOD) of the Zns theoretical capacity (820 mA h g−1) creates a cell energy density of ∼160 W h L−1; however, this causes a drastic shape change and formation of irreversible zinc oxide (ZnO) at the anode, which ultimately causes cell failure after ∼100 cycles. A drop in energy density is also observed as a result of the interaction of dissolved Zn ions with the cathode, which forms a resistive Zn-birnessite compound in the early cycles, and then forms a highly resistive haeterolite (ZnMn2O4) in the later cycles, and ultimately causes cathode failure. A possible solution using a calcium hydroxide layer as a separator is presented, where the layer blocks the interaction of zinc ions through a complexing mechanism to obtain >900 cycles with >80% retention of MnO2 DOD.


Chemistry of Materials | 2017

Rechargeable Zinc Alkaline Anodes for Long-Cycle Energy Storage

Damon E. Turney; Joshua W. Gallaway; Gautam G. Yadav; Rodolfo Ramirez; Michael Nyce; Sanjoy Banerjee; Yu-chen Karen Chen-Wiegart; Jun Wang; Michael J. D’Ambrose; Snehal Kolhekar; Jinchao Huang; Xia Wei


Journal of Power Sources | 2016

Operando identification of the point of [Mn 2 ]O 4 spinel formation during γ-MnO 2 discharge within batteries

Joshua W. Gallaway; Benjamin Joseph Hertzberg; Zhong Zhong; M. Croft; Damon E. Turney; Gautam G. Yadav; Daniel A. Steingart; Can K. Erdonmez; Sanjoy Banerjee


Electrochimica Acta | 2016

Impact of anode substrates on electrodeposited zinc over cycling in zinc-anode rechargeable alkaline batteries

Xia Wei; Divyaraj Desai; Gautam G. Yadav; Damon E. Turney; Alexander Couzis; Sanjoy Banerjee


Electrochemistry Communications | 2017

A calcium hydroxide interlayer as a selective separator for rechargeable alkaline Zn/MnO2 batteries

Jinchao Huang; Gautam G. Yadav; Joshua W. Gallaway; Xia Wei; Michael Nyce; Sanjoy Banerjee


International Journal of Hydrogen Energy | 2018

Accessing the second electron capacity of MnO 2 by exploring complexation and intercalation reactions in energy dense alkaline batteries

Gautam G. Yadav; Xia Wei; Jinchao Huang; Damon E. Turney; Michael Nyce; Sanjoy Banerjee


Materials Today Energy | 2017

Rapid electrochemical synthesis of δ-MnO2 from γ-MnO2 and unleashing its performance as an energy dense electrode

Gautam G. Yadav; Xia Wei; Joshua W. Gallaway; Zeeshan Chaudhry; Amy Shin; Jinchao Huang; Roman Yakobov; Michael Nyce; Nikhil Vanderklaauw; Sanjoy Banerjee


Journal of The Electrochemical Society | 2018

An Operando Study of the Initial Discharge of Bi and Bi/Cu Modified MnO2

Joshua W. Gallaway; Gautam G. Yadav; Damon E. Turney; Michael Nyce; Jinchao Huang; Yu-chen Karen Chen-Wiegart; Garth J. Williams; Juergen Thieme; John S. Okasinski; Xia Wei; Sanjoy Banerjee


Chemistry of Materials | 2018

Correction to Rechargeable Zinc Alkaline Anodes for Long-Cycle Energy Storage

Damon E. Turney; Joshua W. Gallaway; Gautam G. Yadav; Rodolfo Ramirez; Michael Nyce; Sanjoy Banerjee; Yu-chen Karen Chen-Wiegart; Jun Wang; Michael J. D’Ambrose; Snehal Kolhekar; Jinchao Huang; Xia Wei

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Michael Nyce

City College of New York

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Jinchao Huang

City College of New York

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Xia Wei

City College of New York

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Garth J. Williams

Brookhaven National Laboratory

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Juergen Thieme

Brookhaven National Laboratory

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