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The Advanced Electrolyte Research Group seeks to develop new organic materials for next-generation electrochemical energy storage, such as electrolyte solvents, lithium salts, SEI formation additives, redox-active organic electrodes and polymer materials.
The Electrochemical Science group studies the synthesis, structure, and transport properties of materials at the interface between electroactive materials and either a liquid or solid electrolyte.
Engineering Research is a multi-disciplinary group focused on demonstrating the feasibility of advanced electrochemical energy storage materials and systems in real world applications.
The Materials Research group specializes in the synthesis and electrochemical characterization of advanced battery materials for a number of energy storage applications with a focus on transportation.
Integrated tools that can be used to optimize hydropower planning and performance and has the unique capability to simultaneously optimize water, power, and environmental performance
Method to compensate anode for initial irreversible capacity loss
Enables lithium- deficient cathode materials through lithium source
An as-prepared cathode for a secondary battery, the cathode including an alkaline source material including an alkali metal oxide, an alkali metal sulfide, an alkali metal salt, or a combination of any two or more thereof.
A cathode coating that leads to faster battery charging and discharging without a loss in performance
Charge and discharge capacity of pristine, 250ºC dry air and 250ºC He/5%H2 heated Li1.12Mn0.55Ni0.145Co0.1O2 showing better perf
Two processes are provided. In the first process, an electro-active material is heated and exposed to a reducing gas to form a surface-treatment layer on the electro-active material. The reducing gas comprises hydrogen, carbon monoxide, carbon dioxide, an alkane, an alkyne, or an alkene. The process also includes introducing an inert gas with the reducing gas. The surface-treated, electro-active material may be used in a variety of applications such as in a rechargeable lithium battery.
The second process includes mixing an electro-active material and a reducing agent to form a surface treatment layer on the electro-active material; and then removing the reducing agent. Removal includes vacuuming, filtering, or heating. The reducing agent is hydrazine, NaH, NaBH4, LiH, LiAlH4, CaH2, oxalic acid, formic acid, diisobutylaluminium hydride, zinc amalgam, diborane, a sulfites, dithiothreitol, or Sn/HCl, Fe/HCl. The partially reduced electro-active material can be used in a variety of applications such as a rechargeable lithium battery, a primary lithium battery, or a secondary lithium battery.
Benefits
Increased electrical conductivity of cathode materials, which improves the rate capability of the material. By this process the battery can be charged or discharged faster without losing its electrochemical performance.
Applications and Industries
Coatings for electrodes used in batteries for
Electric and plug-in hybrid electric vehicles;
Portable electronic devices;
Medical devices; and
Space, aeronautical, and defense-related devices.
Developmental Stage
Proof of concept
Increased safety and security from battery gas release
Intellectual Property Available to License
US Patent 9,825,287
Surface Modification Agents for Lithium Batteries (ANL-IN-08-026)
A process to modify the surface of the active material used in an electrochemical device. The modification agent can be a silane, organometallic compound, or a mixture of two or more of such compounds. Both negative and positive electrodes for lithium-ion batteries can be made from the surface-modified active materials. Surface modification can be accomplished by either adding the agent to a non-aqueous electrolyte used in constructing a battery, or by treating the materials in a gas phase or in a solution.
Benefits
Schematic of surface modification for battery materials.
Increased safety and life of lithium-ion batteries, as the surface modification prevents a catalytic reaction in lithium-ion cells that generates hydrogen gas, which can lead to substantial power fade of the cell and potential explosions.
Includes methods and molecules as additives that enable electrode modification.
Applications and Industries
Coatings for electrodes used in batteries for
Electric and plug-in hybrid electric vehicles;
Portable electronic devices;
Medical devices; and
Space, aeronautical, and defense-related devices.
Developmental Stage
Reduced to practice
Safe, stable and high capacity cathodes for lithium-Ion batteries using a unique materials gradient
Intellectual Property Available to License
US Patent 8,591,774 B2
Model for the Fabrication of Tailored Materials for Lithium-ion Batteries (ANL-IN-10-036)
Calculated concentration profile depicting the relative concentration of Mn and Ni fed to the reactor as a function of time.
A unique method to control the composition gradient of materials in lithium-ion cathodes. The material particles created using this method are nickel-rich on the inside for a high capacity battery, and manganese-rich on the exterior surface for increased safety and stability.
The process includes combining a first transition metal compound with a second transition metal compound to form a transition metal source solution, and combining that solution with a precipitating agent to form a precursor solution. The radius of precipitating particles consists of a transition metal oxide core and at least two layers of transition metal oxide. The particles have a transition metal concentration gradient in which the ratio of the first transition metal to the second transition metal is inversely proportional to the radius of the particle over at least a portion of the radius. The transition metal used in the first and second transition metal compounds include manganese, cobalt, nickel, chromium, vanadium, aluminum, zinc, sodium, titanium or iron. The first and second transition metal compounds can also include, but are not limited to, metal sulfates, nitrates, halides, acetates or citrates.
Cartoon qualitatively illustrating the transition metal composition at the surface and interior of a particle formed with a cont
Benefits
Creates a gradient of different materials for increased safety and stability;
Gradient runs throughout the entire radius of the particle;
Particles are ideally small, 10-20 microns in size; and
Leads to high-capacity batteries.
Applications and Industries
The particles can be used to create composite cathodes in batteries for
