Chemical Transformation
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Dendrite-Free Li Deposition Using Trace-Amounts of Water as an Electrolyte Additive
Residual water (H2O) present in nonaqueous electrolytes has been widely regarded as a detrimental factor for lithium (Li) batteries. However, dendrite-free Li film can be obtained with trace H2O as an electrolyte additive. Read More
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Anodes for Rechargeable Lithium-Sulfur Batteries
Recent developments on the protection of the Li metal anode in Li-S batteries are reviewed Read More
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Direct Observation of the Redistribution of Sulfur and Polysufides in Li-S Batteries by In Situ X-Ray Fluorescence Microscopy
The dissolution and redistribution of sulfur and polysulfides were directly observed by XRF imaging. The long-chain polysulfides were generated as soon as discharge was initiated. The dissolved polysulfide diffused to the anode side and deposited onto (and reacted with) lithium metal. Read More
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Following the Transient Reactions in Lithium-Sulfur Batteries Using an In Situ Nuclear Magnetic Resonance (NMR) Technique
First in situ NMR characterization of the full cell electrochemical reactions in Li-S batteries using a microbattery design Read More
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Direct Observation of SEI and Dendrite Dynamics by Operando Electrochemical Scanning Transmission Electron Microscopy
Implemented “battery in a STEM” - an operando electrochemical stage inside an Cs-corrected scanning transmission electron microscope (STEM) Read More
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Molecular‐Confinement of Polysulfide within HybridElectrodes for High Mass Loading in Lithium Sulfur Batteries
N-doped carbon stabilizes the S3 radicals, which are rarely detected in ether-based electrolyte due to their high reactivity; this also restrains the polysulfide loss during battery cycling. Read More
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First-Principles Study of Redox End-Members in Li-Sulfur Batteries
Van der Waals-augmented density functional theory (vdW-DF), quasi-particle methods (G0W0), and continuum solvation techniques were used to predict several structural, thermodynamic, spectroscopic, electronic, and surface characteristics of solid-phase redox end-members in Li-S batteries. Read More
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A Highly Active Nanostructured Metallic Oxide Cathode for Li-O2 Batteries
Synthesis of a low-cost nanocrystalline metallic metal oxide that shows very good ORR/OER properties in a Li-O2 cell, highlighting the importance of controlling the cathode interface to achieve better round-trip efficiency Read More
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Nanoparticle-Driven Assembly of Highly Conducting Hybrid Block Copolymer Electrolytes
The ionic conductivity of nanostructured SEO block copolymer electrolytes is closely related to the morphology Read More
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Electrode Interface Dictates Oxygen Evolution from Lithium Peroxide in Li-O2 Batteries
Identification of the critical role the surface properties of metallic TiC & TiN supports play in Li-O2 electrochemistry. Oxygen evolution from bulk Li2O2 is enabled by "clean" surfaces but completely inhibited by 2-3 nm thick TiO2 films. Read More
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JCESR Spotlight: Bob Jin Kwon, A Postdoc with Passion and Perseverance
Argonne recognizes Kwon’s contributions to battery science with the Postdoctoral Performance Award. Article authored by: Michael Matz, Argonne Associate Bob Jin Kwon likes a good challenge, particularly when it comes to developing completely new kinds of batteries. “Developing new battery technologies is very challenging,” said … Read More
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JCESR Spotlight: Lily Robertson Recognized for Her Contributions to Battery Research
Argonne’s Postdoctoral Performance Award recognizes scientific achievements, leadership, and collaboration. Article authored by: Michael Matz, Argonne Associate Since her early days growing up in the Pacific Northwest, Lily Robertson has always wanted to help make the world a better place. “For as … 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
