A5062736313- Advanced battery technologies research
- Electrocatalysts for Energy Conversion
- Electrochemical Analysis and Applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Advancements in Solid Oxide Fuel Cells
- Advanced Battery Technologies Research
- Molten salt chemistry and electrochemical processes
- Advanced Battery Materials and Technologies
- Perovskite Materials and Applications
- Metallurgical Processes and Thermodynamics
- Fuel Cells and Related Materials
- Supercapacitor Materials and Fabrication
- Extraction and Separation Processes
- Gas Sensing Nanomaterials and Sensors
- Transition Metal Oxide Nanomaterials
- Chemical Looping and Thermochemical Processes
- Inorganic Fluorides and Related Compounds
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Oxidative Organic Chemistry Reactions
- Catalysts for Methane Reforming
- Advancements in Battery Materials
- CO2 Reduction Techniques and Catalysts
- Thermal and Kinetic Analysis
- Semiconductor materials and interfaces
Massachusetts Institute of Technology
2014-2020
Energy Storage Systems (United States)
2016-2020
Form Energy (United States)
2018
Argonne National Laboratory
2017-2018
Boston University
2011-2015
IIT@MIT
2015
Moscow Institute of Thermal Technology
2014
Symmetric flow cell cycling of a soluble phenothiazine.
Redox-active organic materials (ROMs) have shown great promise for redox flow battery applications but generally encounter limited cycling efficiency and stability at relevant material concentrations in nonaqueous systems. Here we report a new heterocyclic anolyte molecule, 2,1,3-benzothiadiazole, that has high solubility, low potential, fast electrochemical kinetics. Coupling it with benchmark catholyte ROM, the demonstrated significant improvement cyclable cell efficiencies compared to...
A new nonaqueous symmetric redox flow battery was developed based on an organic ambipolar electroactive material. FTIR demonstrated great potential for online monitoring of the state charge this battery.
Engineering the electrochemical reactor of a redox flow battery (RFB) is critical to delivering sufficiently high power densities, as achieve cost-effective, grid-scale energy storage. Cell-level resistive losses reduce RFB density and originate from ohmic, kinetic, or mass transfer limitations. Mass affect all RFBs are controlled by active species concentration, state-of-charge, electrode morphology, rate, electrolyte properties, field design. The relationship among field, cell performance...
Simple modification of <italic>N</italic>-ethylphenothiazine (left) with electron-donating substituents (right) increases the molecular charge-storage capacity this donor.
This study aims to advance our understanding of the physical and electrochemical behavior nonaqueous redox electrolytes at elevated concentrations develop experimentally informed structure–property relationships that may ultimately enable deterministic design soluble multielectron-transfer organic couples for use in flow batteries. To this end, we functionalized a phenothiazine core simultaneously impart two desired properties: high solubility multiple electron transfer. Specifically, report...
Nonaqueous redox flow batteries (NAqRFBs) are a promising, but nascent, concept for cost-effective grid-scale energy storage. While most studies report new active molecules and proof-of-concept prototypes, few discuss cell design. The direct translation of aqueous RFB design principles to nonaqueous systems is hampered by lack materials-specific knowledge, especially concerning the increased viscosities decreased conductivities associated with electrolytes. To guide NAqRFB reactor design,...
Redox-active organic molecules (ROMs) are an attractive alternative to the inorganic, charge-storing compounds typically used in modern batteries as they exhibit potentially superior electrochemical properties, a wide materials design space, and abundance of raw constituent materials, which, turn, may open pathways inexpensive energy storage. However, most these not produced on commercial scale, assessing cost proposition new ROMs is challenging but critical task for projecting economic...
Redox flow batteries (RFBs) are promising devices for grid energy storage, but additional cost reductions needed to meet the U.S. Department of Energy recommended capital $150 kWh−1 an installed system. The development new active species designed lower or improve performance is a approach, these materials often require compatible electrolytes that optimize stability, solubility, and reaction kinetics. This work quantifies changes in RFB different aqueous supporting paired with types...
Abstract Polymer electrolyte membranes employed in contemporary fuel cells severely limit device design and restrict catalyst choice, but are essential for preventing short‐circuiting reactions at unselective anode cathode catalysts. Herein, we report that nickel sulfide Ni 3 S 2 is a highly selective the oxygen reduction reaction presence of 1.0 m formate. We combine this with carbon‐supported palladium (Pd/C) to establish membrane‐free, room‐temperature formate cell operates under benign...
Nonaqueous redox flow batteries (NAqRFBs) are promising devices for grid-scale energy storage, but high projected prices could limit commercial prospects. One route to reduced is minimize or eliminate the expensive supporting salts typically employed in NAqRFBs. Herein, feasibility of a cell operating absence salt by utilizing ionic active species demonstrated. These have conductivities acetonitrile (12-19 mS cm-1 ) and cycle at 20 mA cm-2 with efficiencies (>75 %) comparable those...
The Solid Oxide Membrane (SOM) process for magnesium production involves the direct electrolysis of oxide energy efficient and low-carbon production. In SOM process, is dissolved in a molten oxy-fluoride flux. An oxygen-ion-conducting tube, made from yttria stabilized zirconia (YSZ), submerged operating life electrolytic cell can be improved by understanding degradation processes YSZ, one way YSZ degrades diffusion out YSZ. By adding small amounts YF3 to flux, controlled. into flux was...
The solid oxide membrane ( SOM ) process has been used to produce magnesium by direct electrolysis of its oxide. In this process, MgO is dissolved in a molten CaF 2 – MgF flux and an yttria‐stabilized zirconia YSZ separates the cathode from anode. stability limits operating life process. This study investigates interactions between salt. known degrade due diffusion yttria into flux. Yttria can, however, be decreased or prevented adding YF 3 When activity greater than that membrane, observed...
Abstract Polymer electrolyte membranes employed in contemporary fuel cells severely limit device design and restrict catalyst choice, but are essential for preventing short‐circuiting reactions at unselective anode cathode catalysts. Herein, we report that nickel sulfide Ni 3 S 2 is a highly selective the oxygen reduction reaction presence of 1.0 m formate. We combine this with carbon‐supported palladium (Pd/C) to establish membrane‐free, room‐temperature formate cell operates under benign...