A5061680612- Advanced battery technologies research
- Supercapacitor Materials and Fabrication
- Electrocatalysts for Energy Conversion
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Transition Metal Oxide Nanomaterials
- Perovskite Materials and Applications
- Geoscience and Mining Technology
- Fuel Cells and Related Materials
- Chemical Synthesis and Characterization
- Gas Sensing Nanomaterials and Sensors
- Nanoporous metals and alloys
- Metal Extraction and Bioleaching
- Surfactants and Colloidal Systems
- Conducting polymers and applications
- Advanced Energy Technologies and Civil Engineering Innovations
- Pickering emulsions and particle stabilization
- Molten salt chemistry and electrochemical processes
- Advanced Battery Technologies Research
- Graphene research and applications
- Catalytic Processes in Materials Science
- Advanced Chemical Sensor Technologies
- CO2 Reduction Techniques and Catalysts
- Geochemistry and Geochronology of Asian Mineral Deposits
- Electrochemical Analysis and Applications
University of Michigan
2015-2021
Argonne National Laboratory
2017-2021
Ann Arbor Center for Independent Living
2015-2017
Energy Storage Systems (United States)
2017
Redox flow batteries are attractive for large-scale energy storage due to a combination of high theoretical efficiencies and decoupled power capacities. Efforts significantly increase densities by using nonaqueous electrolytes have been impeded separators with low selectivities. Here, we report nanoporous based on aramid nanofibres, which assembled scalable, cost, spin-assisted layer-by-layer technique. The multilayer structure yields 5 ± 0.5 nm pores, enabling nanofiltration selectivity....
Abstract 1,4‐Dimethoxybenzene derivatives are materials of choice for use as catholytes in non‐aqueous redox flow batteries, they exhibit high open‐circuit potentials and excellent electrochemical reversibility. However, chemical stability these their oxidized form needs to be improved. Disubstitution the arene ring is used suppress parasitic reactions radical cations, but this does not fully prevent ring‐addition reactions. By incorporating bicyclic substitutions ether chains into...
New active materials are needed to improve the performance and reduce cost of non-aqueous redox flow batteries (RFBs) for grid-scale energy storage applications.
Deficiencies of cathode materials severely limit cycling performance and discharge rates Li batteries. The key problem is that must combine multiple properties: high lithium ion intercalation capacity, electrical/ionic conductivity, porosity, mechanical toughness. Some revealed promising characteristics in a subset these properties, but attaining the entire set often contrarian requires new methods engineering. In this paper, we report surface area 3D composite from reduced graphene oxide...
Catholyte materials are used to store positive charge in energized fluids circulating through redox flow batteries (RFBs) for electric grid and vehicle applications. Energy-rich radical cations (RCs) being considered use as catholyte materials, but be practically relevant, these RCs (that typically unstable, reactive species) need have long lifetimes liquid electrolytes under the ambient conditions. Only few families of such energetic possess stabilities that suitable their RFBs; currently,...
Current collectors are essential features of batteries and many other electronic devices being responsible for efficient charge transport to active electrode materials. Three-dimensional (3D), high surface area current considerably improve the performance cathodes anodes in batteries, but their technological implementation is impeded by complexity preparation, which needs be simple, fast, energy efficient. Here we demonstrate that field-stimulated assembly ∼3 nm copper nanoparticles (NPs)...
The practical implementation of nanomaterials in high capacity batteries has been hindered by the large mechanical stresses during ion insertion/extraction processes that lead to loss physical integrity active layers. challenge combining storage with resilience deformations and efficient charge transport is common for nearly all battery technologies. Layer-by-layer (LBL/LbL) engineered nanocomposites are able mitigate structural design challenges materials requiring combination contrarian...
Redox flow batteries (RFBs) possess a unique combination of attractive attributes including decoupled power and energy storage capacities, low cost, high efficiencies, are promising for large-scale storage. A significant challenge in the development density, non-aqueous systems is lack selective membrane/separator materials. This paper describes novel nanoporous separator based on aramid nanofibers (ANF) produced using spin-coating, layer-by-layer technique. The multilayer structure yields 5...
The development of new redox flow battery chemistries is hampered by time-consuming organic syntheses and electrochemical characterization candidate redoxmer molecules. Here, we use Sure Independence Screening Sparsifying Operator (SISSO) to demonstrate a cross-platform classifier for chemical stability charged redoxmers in electrolyte solutions. This SISSO model yields single formula separate positively dialkoxyarene catholytes negatively pyridinium anolytes into stable unstable species...
The electrochemical oxidation of vanadium acetylacetonate produces vanadyl limiting its use in non-aqueous redox flow batteries. has also drawn little interest as a catholyte active species despite favorable voltage potential (0.7V vs. Ag/Ag+). This is mainly due to low solubility (0.05M) acetonitrile. Our recent bulk electrolysis studies, however, indicate that the reduction highly reversible. For example, there was no capacity fade for >100 cycles at 70% state charge. In this paper, we...
Lithium ion batteries commonly utilize layered oxide materials as the cathode, where lithium is intercalated and deintercalated between layers in crystal structure during cycling. The repeated insertion extraction can cause stress on material, leading to fracture. Additionally, extent of lithiation may phase changes that are sometimes irreversible. These material capacity loss reduce battery cycle life. This research focuses nanostructuring oxides enhance their cyclability power...
Hydroquinone ethers are a key class of catholyte materials for non-aqueous redox flow batteries, showing high open-circuit potential, electrochemical reversibility and chemical tunability. However, the instability many hydroquinone ethers, particular to oxidation, limits their applicability. 2,5-dialkylation benzene core has been by far only effective approach suppress side reactions corresponding radical cations, restricting space structures from which choose. This talk will describe...
The practical application of non-aqueous redox flow batteries (NRFBs) sets stringent requirements on the electrochemical stability active materials. In pair for NRFBs, high-potential species is referred to as catholyte, which oxidized into radical cation state in charging process. Hydroquinone ethers are a key class catholyte materials, but intermolecular reaction between cations dominating decomposition pathway during functioning. order increase introduction bulky alkyl spacers at 2,5-...
In article number 1701272, Xiaoliang Wei, Lu Zhang, and co-workers report the development of novel bicyclical substituted dialkoxybenzene molecules, BODMA BODEA, for use as catholyte materials in NRFBs. They are engineered to provide greater solubility (in their neutral state) improved chemical stability charged state). A hybrid flow cell using material demonstrates stable efficiencies capacity over 150 cycles.