Neil gave an invited talk at University of Toronto. Thanks Prof. Ted Sargent for the invitation!
Author: ndasgupt
New paper on ALD of bismuth vanadate photoanodes
Our new paper “Atomic Layer Deposition of Bismuth Vanadate Core-Shell Nanowire Photoanodes” is published in Chemistry of Materials. In this paper, we systematically tune the composition of BiVO4 films deposited by ALD, which is enabled by use of a novel Bi-alkoxide precursor. By forming core-shell nanowires using ALD, we measure a photocurrent of 2.9 mA/cm2 at a voltage of 1.23 V vs. RHE — the highest reported photocurrent to date for any photoanode deposited by ALD. [link]
Invited talks at UC Berkeley and Vanderbilt University
Neil gave invited talks at UC Berkeley’s Nano Seminar, and in the Department of Mechanical Engineering at Vanderbilt University. Thanks Prof. Peidong Yang (UCB), and Prof. Kelsey Hatzell (Vanderbilt) for the invitations!
Journal cover of Advanced Energy Materials
Our recent paper on ALD-coated 3-D current collectors for high Coulombic efficiency lithium metal anodes was selected as the front cover image in the January 2019 issue of Advanced Energy Materials! [cover image]
New paper on lithium battery mechanics published
Our paper “Lithium Mechanics: Roles of Strain Rate and Temperature and Implications for Lithium Metal Batteries” is published in Journal of the Electrochemical Society. In this paper we present a comprehensive set of mechanical deformation experiments on bulk lithium, demonstrating strong strain rate and temperature dependence. This is attributed to power-law creep, which we show is the dominant deformation mechanism for Li metal anodes over a wide range of battery-relevant conditions. Examples in solid-state and liquid lithium metal batteries are discussed. [link]
New paper on Li metal anodes with high Coulombic Efficiency
Our new paper “Synergistic Effect of 3D Current Collectors and ALD Surface Modification for High Coulombic Efficiency Lithium Metal Anodes” is published in Advanced Energy Materials. In this paper, we systematically tune the geometry and surface chemistry of highly-ordered 3-D electrode architectures. By forming core-shell pillars using ALD, we measure Coulombic Efficiency values up to 99.5% — matching the highest reported values to date. [link]
MRS Fall 2018 Meeting
Neil co-organized a symposium at the Fall MRS Meeting entitled “In Situ/Operando Analysis of Electrochemical Materials and Interfaces”, together with Prof. Matt McDowell. Ph.D. candidates Andrew Davis and Adrian Sanchez each presented their work at the symposium. Neil also presented an invited talk in the Solid-State Batteries symposium (thanks to Prof. Liangbing Hu for the invitation!)
Invited talk at UIUC
Neil gave an invited talk in the Manufacturing Interest Group at University of Illinois at Urbana-Champaign. Thanks Prof. Sameh Tawfick for the invitation!
Invited talk at Carnegie Mellon
Neil gave in invited talk in the Department of Mechanical Engineering at Carnegie Mellon University. Thanks Prof. Venkat Viswanathan for the invitation!
New Paper on ALD for Solid-State Batteries
Our paper “Atomic Layer Deposition and First Principles Modeling of Glassy Li3BO3-Li2CO3 electrolytes for solid-state Li metal batteries” is published in Journal of Materials Chemistry A. In this collaborative work with the Siegel and Sakamoto groups at UM, we report the highest Li-ion conductivity to date in an ALD solid electrolyte, which is also stable against Li metal and air exposure. [Link]