A5004592482- Advancements in Battery Materials
- Advanced Battery Technologies Research
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Semiconductor materials and devices
- Extraction and Separation Processes
- Electron and X-Ray Spectroscopy Techniques
- Energetic Materials and Combustion
- Semiconductor materials and interfaces
- Fuel Cells and Related Materials
- Electrochemical Analysis and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Nanomaterials for catalytic reactions
- Recycling and Waste Management Techniques
- Electrocatalysts for Energy Conversion
- X-ray Diffraction in Crystallography
- Nanocluster Synthesis and Applications
- Conducting polymers and applications
- Anodic Oxide Films and Nanostructures
- Copper-based nanomaterials and applications
- Graphene research and applications
- Crystallization and Solubility Studies
- Thermal and Kinetic Analysis
- Electrochemical sensors and biosensors
- Chemical Reactions and Mechanisms
National Renewable Energy Laboratory
2020-2025
Colorado State University
2018-2023
Los Alamos National Laboratory
2015-2017
Los Alamos Medical Center
2015
Colorado School of Mines
2012-2014
Clausthal University of Technology
1975
The fused-ring heterocycle 4-amino-3,7,8-trinitropyrazolo-[5,1-<italic>c</italic>][1,2,4]triazine (PTX) has promising explosive properties.
Platinum‐based catalytic materials have received significant attention, particularly in the shape and size control of faceted for catalysis. More recently, there has been a rapid increase number reports successful preparations this field; however, fundamental understanding controlled growth towards material design is essential future implementation broad application. In review, we provide an overview recent findings reported since 2009, focusing on methods as well effects exposed surface...
A 74 wt% silicon composite electrode delivers 1000 cycles with 74% capacity retention against NMC811 cathodes and a cell stack energy density of 212 W h kg −1 in standard carbonate electrolyte two simple chemical process improvements.
ADVERTISEMENT RETURN TO ISSUEPREVViewpointNEXTHalf-Cell Cumulative Efficiency Forecasts Full-Cell Capacity Retention in Lithium-Ion BatteriesMaxwell C. SchulzeMaxwell SchulzeChemistry and Nanoscience Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United StatesMore by Maxwell Schulzehttp://orcid.org/0000-0001-8368-4054 Nathan R. Neale*Nathan NealeChemistry States*Email: [email protected]More Nealehttp://orcid.org/0000-0001-5654-1664Cite this:...
Li-ion batteries will lose both capacity and power over time due to calendar aging caused by slow parasitic processes that consume Li + ions. Studying mitigating these is traditionally an equally venture, which especially taxing for the validation of new active materials electrolyte additives. Here, we evaluate whether potentiostatic holds can be used accelerate diagnosis loss during aging. The technique based on idea that, under right conditions, current measured as cell voltage held...
Abstract This study demonstrates a rapid, dry, microwave‐assisted (MW) synthesis method that enables preparation of halide argyrodites ( , ) in less than 20 min. The structures and ion transport properties the resulting materials are compared with those synthesized by conventional solid‐state methods. leads to increased site disorder elevated Arrhenius prefactors (), which lead an order magnitude improvement 30 ionic conductivity MW‐. X‐ray pair distribution function analysis (XPDF) reveals...
Abstract Behind-the-Meter Storage (BTMS) systems require dedicated development of battery materials that target long cycle life and low cost at the system level. Pairing Li 4 Ti 5 O 12 (LTO) LiNi 0.90 Mn 0.05 Co 2 (NMC90-5-5) shows promise to achieve targets for BTMS applications; however, minimal literature is available discusses electrolyte solvent selection this pairing. This study explores role on in LTO/NMC90-5-5 batteries. Four model electrolytes are evaluated; baseline, Gen2, compared...
Herein, we evaluate the effect of covalently attached molecular coating hydrophobicity on surface silicon nanoparticle (Si NP) active anode material for Li-ion batteries. The experiments are a means to identify interfacial properties that help minimize electrochemical side reactions during cycling. Preformed coatings Si NP surfaces prior electrode fabrication mimic ionically conducting and electronically insulating solid electrolyte interphase (SEI). Hydrophilic oligomers such as...
Rapid advancements in safe and high-energy-density energy storage are predicated on identifying new solid-state ion conductors with low activation energies high ionic conductivities for all-solid-state battery technologies. Halide argyrodites among some of the top candidates electrolytes, as they can achieve that approach liquid electrolytes. Incorporating dynamic pseudohalide species argyrodite solid electrolytes presents an exciting opportunity to exploit lattice dynamics a design...
Abstract Silicon anodes for lithium‐ion batteries (LIBs) have the potential higher energy density compared to conventionally used graphite‐based LIB anodes. However, silicon exhibit poor cycle and calendar lifetimes due mechanical instabilities high chemical electrochemical reactivity with carbonate‐based electrolytes that are typically in LIBs. In this work, we synthesize a pitch carbon‐coated nanoparticle composite active material exhibits reduced an uncoated anode. primary particle sizes...
Metallic contaminants pose a significant challenge to the viability of directly recycling Li-ion batteries. To date, few strategies exist selectively remove metallic impurities from mixtures shredded end-of-life material (black mass; BM) without concurrently damaging structure and electrochemical performance target active material. We herein present tailored methods ionize two major contaminants—Al Cu—while retaining representative cathode (LiNi 0.33 Mn Co O 2 ; NMC-111) intact. This BM...
PAA undergoes decarbonylation during electrode curing to form polyethers that provide a silicon coating assists Li-ion desolvation and conduction.
Unstable electrode/electrolyte interface is the major cause of degradation for silicon (Si)-based anodes lithium (Li)-ion batteries. Development functional electrolyte additives can provide a viable path toward stabilizing dynamic Si/electrolyte interface, which will benefit development high energy density Li-ion Here, we evaluate polymerizable with varying groups (fluorocarbon, thiophosphate, and fluorophosphazene). The are examined using LiNi 0.6 Mn 0.2 Co O 2 /Si full cells where cycle...
Choice of substrate material for electrodeposited Sb alloy-anodes influences the cycling stability and lifetime Li-ion batteries.
The convergence of experimentation with modeling shaped platinum nanoparticle synthesis directed by silver concentration enables materials design other systems: facet selective growth predicted palladium nanoparticles synthesized limiting the {111} surface facets.
The electrode processing conditions of silicon-based composite anodes play a pivotal role in the resulting interfacial chemical speciation and, thus, electrochemical cycling behavior electrode. Systematically investigating how small changes to surface silicon nanoparticle (NP) affect larger, electrode-level properties is strategy that will inform design principles maximize energy density and extend lifetime. Here, we incorporate nanoparticles (NPs) with an average diameter 5.5 nm synthesized...
Low first-cycle Coulombic efficiency is especially poor for silicon (Si)-based anodes due to the high surface area of Si-active material and extensive electrolyte decomposition during initial cycles forming solid interphase (SEI). Therefore, developing successful prelithiation methods will greatly benefit development lithium-ion batteries (LiBs) utilizing Si anodes. In pursuit this goal, in study, lithium oxide (Li2O) was added a LiNi0.6Mn0.2Co0.2O2 (NMC622) cathode using scalable...
Silicon-based lithium-ion batteries have started to meet cycle life metrics, but they exhibit poor calendar life. Here, electrolyte fluorination impact on fade of blended silicon-graphite anodes is explored using a LiPF 6 in EC:EMC:FEC vs LiBOB EC:EMC electrolyte. We utilize combined experimental-modeling approach applying potentiostatic voltage holds (V-hold) evaluate suitability for shortened testing timeframe (∼2 months). Our theoretical framework deconvolutes the irreversible parasitic...
Abstract The shape of nanocrystals determines surface atomic arrangement and coordination, influencing their chemical physical properties. We present a novel facile approach to synthesize gold icosahedra by employing glucose as reducing reagent sodium dodecyl sulfate directing agent in the environmentally benign medium water at room temperature. size can be controlled range 30–250 nm altering reaction conditions. High‐resolution microscopy diffraction studies indicate are composed rotational...
700 °C is the optimal heat treatment temperature for pitch-coated silicon electrodes. Both amorphous carbon/pitch and are active materials but store Li + ions through different ion storage mechanisms contribute to overall performance.