Research Highlights
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Flow Batteries Enabled by Nanoscale Percolating Conductor Networks
Created novel electronically conductive flow battery electrodes using nanoscale percolation phenomena Read More
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Coordination Chemistry in Magnesium Battery Electrolytes: How Ligands Affect Their Performance
Identification of the solution coordination structures of Mg(BH4)2 through a simple NMR method. Read More
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In-Situ Liquid (ec)-TEM Cell Shows Dendrite Formation, Providing New Insights into Lithium Batteries
Demonstrated that formation of solid electrolyte interphase (SEI) as dendrites occurs before lithium electrodeposition on the gold electrode and remains after lithium electrodissolution, changing our view of dendrite formation and the safety of lithium-ion batteries. Read More
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Lithium Metal Anodes for Rechargeable Batteries
Various factors affecting the morphology and Coulombic efficiency of Li metal anodes have been analyzed Read More
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Degradation Mechanisms in Li-Ion Battery Electrolytes Uncovered by In-Situ Scanning Transmission Electron Microscopy
Directly observed a sequence of interconnected electrolyte degradation mechanisms to evaluate stability and degradation in battery electrolytes Read More
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Rational Design of High-Performance Li2S Cathodes
Achieved record performance in Li2S cathodes by using ab initio simulations to guide our rational selection of effective bifunctional binders. Read More
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In-Situ TEM and DFT Study of Large Cation Transport and Failure Mechanism In Single SnO2 Nanowire
Direct measurement reveals that Na ion diffusion is 30 times slower than Li ion. Na insertion softens nanowire and causes significant deformation to lead to easy deformation of the product. Pore formation upon Na ion removal leads to poor cycliability of the SnO2 electrode Read More
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Understanding fluorine-free electrolytes via small-angle X-ray scattering
We compare the solvation phenomenon of sodium tetraphenylborate (NaBPh4) salt dissolved in organic solvents of propylene carbonate (PC), 1,2-dimethoxyethane (DME), acetonitrile (ACN) and tetrahydrofuran (THF) by SAXS/WAXS measurement and MD simulation. Read More
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Navigating the Minefield of Battery Literature
This is an invited perspective aiming to help researchers new to the field of battery research to circumvent certain recurring misconceptions and inaccuracies in the current battery literature. It covers the electrolyte ideality and practical situation in batteries, the difficulty in accurately determining ion transference … Read More
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Quantifying Lithium Ion Exchange in Solid Electrolyte Interphase (SEI) on Graphite Anode Surfaces
By using Li isotopic labelling of SEIs and electrolytes followed by time-of-flight secondary-ion mass spectroscopy and solid-state NMR analyses, we found that the majority of Li+ “immobilized” in the chemical ingredients were exchanged after 1 SEI formation cycle. Ion exchange by diffusion based on concentration … Read More
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A Sobering Examination of the Feasibility of Aqueous Aluminum Batteries
We revealed the first compelling evidence for a dynamic octahedral solvation structure around Al3+ dominated by labile water and OH-, without Al-OTf contact ion pairs, at high salt concentrations. High proton activity is observed in transport and electrochemical measurements which relates well with the proposed … Read More
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Ion Migration Mechanisms in the Sodium Sulfide Solid Electrolyte Na3-xSb1-xWxS4
The atomic-scale mechanisms that underlie the exceptionally high ionic conductivity of Na3-xSb1-xWxS4 are elucidated. The conductivity is well explained by a combination of vacancy-related effects and a strong overlap of cation vibrational modes with anion librations. Read More
