Research Highlights
-
Direct Nano-Synthesis Methods Notably Benefit Mg-Battery Cathode Performance
A novel Mg cathode material – CuCo2S4 – was identified as a conversion material where direct nano-synthesis was required to provide the best electrochemical performance and deliver 350 mAh·g-1 at 60 °C, a capacity nearly double that of ball-milled material with similar dimensions. Read More
-
Quantifying Capacity Losses due to Solid Electrolyte Interphase Evolution
We quantified the capacity loss originating in solid electrolyte interphase (SEI) growth during each cycle and extracted the proportionality constant for SEI growth following a parabolic growth law. This continuous SEI growth contributes to the increasing overpotential, leading to capacity fading at a given constant current cycling rate. Read More
-
On Lifetime and Cost of Redox-Active Organics for Aqueous Flow Batteries
In this viewpoint, we recommend methodology for (1) testing aqueous organic flow batteries to better understand the fade mechanisms and failure modes, and for (2) techno-economic assessment of these batteries that incorporates the costs associated with electrolyte decay and replacement to articulate a feasible design space for the community to target. Read More
-
The impact of bulk electrolysis cycling conditions on the perceived stability of redox active materials
Under bulk electrolysis conditions, cycle time is a better measure of stability than cycle number and, for materials that are unstable in their charged state, the fractional capacity accessed is inversely related to cycle time until failure. Read More
-
Experimentally validated 3D pore-scale lattice Boltzmann model for understanding porous electrode microstructure
Three dimensional (3D) multi-physics models of porous carbon electrodes are employed to understand the role of electrode microstructure on redox flow battery performance. Read More
-
A Simple Halogen-free Magnesium Electrolyte for Reversible Magnesium Deposition through Co-solvent Assistance
Electrolytes for Mg-ion batteries are a complex mixture of salts, solvents, and additives that allow for the free-movement of Mg-ions across the cell. By addition of simple amines to the mixture, the internal equilibriums are shifted to allow formation of a simpler neutral complex in solution that does not require use of corrosive halide anions (Figure 1). Read More
-
A Single-Ion Conducting Borate Network Polymer as a Viable Quasi-Solid Electrolyte for Lithium Metal Batteries
An anionic network polymer, ANP-5, membrane exhibits high room temperature ionic conductivity and selectivity for Li+ ion conduction, outstanding electrochemical stability, and flame retardancy. Read More
-
Asymmetric Composition of Ionic Aggregates and the Origin of High Correlated Transference Number in Water-in-Salt Electrolytes
MD simulations revealed the heterogeneous structure of ion and water domains/aggregates and fairly high correlated transference number in the water-in-salt electrolytes. Read More
-
Probing Electrolyte Structure at Interfaces: An Example of the Power of Variable Temperature and Pressure Operando MAS NMR
We have developed a robust method to analyze battery systems under finely-controlled environments of specified composition, temperature, and pressure to reveal the interactions of electrolytes with electrode surfaces. Read More
-
Electrochemical Mg-ion Activity in MgCr2-xVxO4 Spinel Oxides
Bulk demagnesiation in MgCrVO4 spinel lattice is observed in a full-cell configuration paired with a Mg metal anode in a chemically and anodically stable Mg(TPFA)2 electrolyte at 110 oC. Read More
Latest Updates
See All-
A Message from JCESR Director George Crabtree
Despite the coronavirus challenges, JCESR continues to push the frontier of energy storage science as we telecommute from home, like much of the nation. We are turning our attention to computation, data analysis and paper writing which continues at a normal or higher pace, enabled … Read More
-
You’re invited: Idaho National Laboratory and JCESR webinar on energy storage (March 18 )
Electrification is changing the energy landscape of the Mountain West region. While energy storage remains a key enabler to this transformation, infrastructure upgrade and supply chain development will be a key driver for this new economy. Join us on March 18 for a webinar where we’ll … Read More
-
Direct Nano-Synthesis Methods Notably Benefit Mg-Battery Cathode Performance
A novel Mg cathode material – CuCo2S4 – was identified as a conversion material where direct nano-synthesis was required to provide the best electrochemical performance and deliver 350 mAh·g-1 at 60 °C, a capacity nearly double that of ball-milled material with similar dimensions. Read More
-
Quantifying Capacity Losses due to Solid Electrolyte Interphase Evolution
We quantified the capacity loss originating in solid electrolyte interphase (SEI) growth during each cycle and extracted the proportionality constant for SEI growth following a parabolic growth law. This continuous SEI growth contributes to the increasing overpotential, leading to capacity fading at a given constant … Read More
-
On Lifetime and Cost of Redox-Active Organics for Aqueous Flow Batteries
In this viewpoint, we recommend methodology for (1) testing aqueous organic flow batteries to better understand the fade mechanisms and failure modes, and for (2) techno-economic assessment of these batteries that incorporates the costs associated with electrolyte decay and replacement to articulate a feasible design … Read More
