Multivalent Intercalation
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Simulations of Anodic Nanopore Growth Using the Smoothed Boundary and Level Set Methods
A new numerical approach for simulating the growth of nanopores during the anodization (electrochemical oxidation) of aluminum was developed, allowing the multidimensional extension of a successful one-dimensional model with a series of interfacial. Simulations indicate that anions adsorbed to the alumina surface play a significant role in the growth and morphology of the nanopores. Read More
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Computational Examination of Orientation-Dependent Morphological Evolution during the Electrodeposition and Electrodissolution of Magnesium
A new model of electrodeposition was developed that includes crucial phenomena required to simulate Mg battery anode cycling and yields results that are consistent with experimental observations. Read More
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Reversible Magnesium Intercalation into a Layered Oxyfluoride Cathode
Magnesium was reversibly intercalated at room temperature into an oxyfluoride cathode without the co-intercalation of electrolytes or protons and without the formation of unwanted side-products that commonly plague oxide cathodes. Read More
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Phase-Controlled Electrochemical Activity of Epitaxial Spinel Thin films as Mg-Cathodes
Epitaxial thin film cathodes of MgMn2O4 (“MMO”) are stabilized in two distinct phases (tetragonal vs. cubic) which reveal distinct electrochemical activities for reversible Mg2+ insertion. Read More
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The First Ca-ion Rechargeable Battery
We have demonstrated the first ever rechargeable battery utilizing calcium as the working ion. Read More
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Promising Directions and the Tools to Get Us There
At the halfway point in our five-year charter, we have narrowed our research directions within the three promising energy storage concepts we are pursuing: multivalent intercalation, chemical transformation, non-aqueous redox flow. In converging these directions to proof-of-concept prototypes, we make extensive use of JCESR’s distinguishing tools. Read More
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Current Collector Corrosion in Ca-Ion Batteries
This study identified and verified corrosion of the metallic current collectors in a series of multivalent electrolyte/electrode systems; calcium based systems were shown to be particularly susceptible to corrosion. Read More
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Demonstration of Magnesium Intercalation into a High-Voltage Oxide Electrode
First demonstration of reversible insertion of multivalent magnesium ions (Mg2+) into a spinel-type manganese oxide (Mn2O4), using multi-modal characterization Read More
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Understanding the Initial Stages of Reversible Mg Deposition and Stripping in Inorganic Nonaqueous Electrolytes
The chemical species at the Mg-anode surface in the presence of Magnesium Aluminum-Chloro complex (MACC) electrolyte were identified. While solvent molecules (THF and DME) are loosely bound at the Mg(0001) surface, the constituents of the MACC electrolyte (e.g. MgCl+, see diagram) are strongly anchored at the electrode. Read More
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A Lewis Acid-free and Phenolate-based Magnesium Electrolyte for Rechargeable Magnesium Batteries
A novel Lewis acid-free all magnesium electrolyte containing 2,6-di-tert-butylphenoxidemagnesium chloride ((DTBP)MgCl + MgCl2) has been deliberately developed. The obtained electrolyte possesses the oxidative stability of up to 2.3 V (vs Mg/Mg2+) with 100% coulombic efficiency, which is comparable to its AlCl3 counterpart. Read More
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Architecture-Controlled Ring-Opening Polymerization for Dynamic Covalent Poly(disulfide)s
We reported a strategy to access different topologies of redox-active poly(disulfide)s by ring-opening polymerization. Control over polymerization enables synthesis of high molecular-weight polymers. The polymers undergo catalytic depolymerization to recycle monomer; a promising feature for sustainable flow batteries. Read More
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Adsorption and Thermal Decomposition of Electrolytes on Nanometer Magnesium Oxide: An in Situ 13C MAS NMR Study
The structural and chemical evolution of electrolyte constituents at the nanometric MgO surface were identified, providing a fundamental understanding of heterogeneous interphase evolution. Read More
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Mechanism-Based Design of a High-Potential Catholyte Enables a 3.2 V All-Organic Nonaqueous Redox Flow Battery
Development of an extremely high-potential catholyte leads to the first 3.2 V all-organic flow battery. Read More
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Shedding X‑ray Light on the Interfacial Electrochemistry of Silicon Anodes for Li-Ion Batteries
Our results shed light on the interfacial electrochemistry of silicon anodes for Lithium-ion batteries (LiBs), providing important mechanistic insight into nanometer scale phenomena and how these influence battery performance. Read More
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Accelerating Electrolyte Discovery for Energy Storage through Machine Learning
Utilized high performance computing to generate a database of highly accurate quantum chemical energies of 133 K organic molecules and used machine learning to enable prediction of energies from low fidelity, low cost quantum chemical calculations. Read More
