A5044798260- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Fiber-reinforced polymer composites
- Extraction and Separation Processes
- Advanced battery technologies research
- Recycling and Waste Management Techniques
- Crystal Structures and Properties
- Graphene research and applications
- Solid-state spectroscopy and crystallography
- Conducting polymers and applications
- Thermal Expansion and Ionic Conductivity
- Semiconductor materials and interfaces
- Fusion materials and technologies
- Nuclear Materials and Properties
- Wildlife-Road Interactions and Conservation
- Ferroelectric and Piezoelectric Materials
- Chemical Synthesis and Characterization
- Aluminum Alloy Microstructure Properties
- Polyoxometalates: Synthesis and Applications
- Aluminum Alloys Composites Properties
- Luminescence Properties of Advanced Materials
- thermodynamics and calorimetric analyses
- Semiconductor materials and devices
DEVCOM Army Research Laboratory
2012-2024
United States Army Combat Capabilities Development Command
2024
Thomas Jefferson National Accelerator Facility
2009
University of Michigan
1992
The effects that electrolyte and air cathode formulation have on discharge capacity, rate capability, the rechargeability of lithium/oxygen organic cell were characterized. To characterize reaction, we used techniques including static dynamic gas consumption measurements scanning electron microscopy. It was found has largest effect capacity capability. Electrode processing is also important in determining at low rate. Brunauer-Emmett-Teller surface area carbon black to prepare electrode not...
The oxygen transport properties of several organic electrolytes were characterized through measurements solubility and electrolyte viscosity. Oxygen diffusion coefficients calculated from viscosities using the Stokes-Einstein relation. solubility, viscosity, partial pressure all directly correlated to discharge capacity rate capability. Substantial improvement in cell performance was achieved optimization increased pressure. concentration electrode under a semi-infinite medium model with...
A reversible dual-graphite intercalation chemistry with simultaneous accommodation of Li+ and PF6− in graphitic structures is enabled for the first time by a high voltage electrolyte based on fluorinated solvent additive, which capable supporting at 5.2 V efficiency. This all-graphite battery promises an energy storage device low cost, safety environmental friendliness that are critical large scale harvesting/storage needs.
Lithium/air batteries have the potential to substantially outperform best battery system nowadays on market. Oxygen reduction reaction (ORR) at cathode in an aprotic organic lithium electrolyte is well-known limit discharge rate and capacity of lithium/air batteries. In this study, characteristics Li/air cells with cathodes made different carbon materials were examined. The results showed that ORR kinetics can be drastically improved by using effective catalyst, achieving higher voltage...
The practical operation of a lithium/oxygen organic electrolyte battery depends on significant amount dissolved oxygen transporting through the permeating carbon black cathode before its reduction occurs. rate transport directly influences capability and discharge capacity. can be tailored to maximize while still retaining ability form stable solid interface with lithium anode, chemical stability towards products , oxidative over . We investigated an ether-based containing four different...
Electrochemical cells utilizing graphite intercalation compounds at both electrodes have been proposed as an energy storage technology where the electrolyte salt is split and stored in on charge reformed discharge. The anion of cathodes these systems studied electrolytes that are resistant to oxidation 5 V but incompatible with anodes. Recent work has demonstrated based monofluoroethylene carbonate (FEC) ethylmethyl (EMC) superior oxidative stability over previously form a stable solid...
Energy storage devices like batteries and supercapacitors, have become indispensable in portable electric vehicles. But, the carbon anodes used these devices, exhibit a significant loss their initial capacity (graphite: 6.6% hard carbon: 29.8%) due to consumption of Li ions from electrolyte during solid interface layer formation other non-reversible reactions, if unaddressed, can potentially diminish this advantage. Pre-lithiation treatment mitigate loss, apart improving cell working...
The stability of electrolytes against highly reactive, reduced oxygen species is crucial for the development rechargeable Li–O 2 batteries. In this work, effect lithium salt concentration in 1,2‐dimethoxyethane (DME)‐based on cycling batteries investigated systematically. Cells with concentrated electrolyte demonstrate greatly enhanced under both full discharge/charge (2.0–4.5 V vs Li/Li + ) and capacity‐limited (at 1000 mAh g −1 conditions. These cells also exhibit much less reaction...
Graphite is, in principle, applicable as a high-power anode lithium-ion batteries (LIBs) given its high intralayer lithium diffusivity at room temperature. However, such cells are known to exhibit poor capacity retention and/or undergo irreversible side reactions including plating when charged current rates above ∼2 C (∼740 mA g −1 ). To explore the inherent materials properties that limit graphite anodes rapid-charge applications, series of full-cells consisting and standard Li[Ni 0.8 Mn...
Lithium–oxygen (Li–O2) batteries with high reversibility require a stable electrolyte against the side reactions Li-metal anode and reactive oxygen species. Moreover, an that can effectively utilize low partial pressure of in atmosphere has significant effect on practical application Li–air batteries. In this study, localized high-concentration (LHCE) was developed using 1H,1H,5H-octafluoropentyl 1,1,2,2-tetrafluoroethyl ether (OTE) as diluent, which satisfies all these conditions...
Abstract A stable electrolyte is critical for practical application of lithium–oxygen batteries (LOBs). Although the ionic conductivity and electrochemical stability electrolytes have been extensively investigated before, their oxygen solubility, viscosity, volatility, against singlet ( 1 O 2 ) still need to be comprehensively provide a full picture electrolytes, especially an open system such as LOBs. Herein, systematic investigation reported on localized high‐concentration (LHCEs) using...
The Li/CF x cell has been traditionally used for low rate applications at discharge rates of C/1000 or lower. development cells capable operating closer to C/10 is underway communication applications. known produce a significant amount thermal power during high and cathode swelling that can result in mechanical deformation the cell. Previously, we characterized both coin large format proposed two phase reaction with direct formation LiF. In this paper measure as function depth, rate,...