
Stability of Li7La3Zr2O12 Garnet Solid-State Electrolyte Against Metallic Lithium
Energy storage demands will require safer, cheaper and higher performance electrochemical energy storage. While the primary strategy for improving performance has focused on state-of-the-art Li-ion batteries, this work seeks to develop solid-state batteries employing metallic Li anode. Recently, the ceramic electrolyte, Li7La3Zr2O12 (LLZO) cubic garnet, has shown promise owing to its unique combination of properties such as high Li-ion conductivity and electrochemical stability. Generally, LLZO is synthesized through powder processing and sintering at high temperature to produce dense membrane. Processing of the ceramic materials produces internal and surface flaws which will inhibit lithium transport creating localized current density and control the stability against Li dendrite propagation. This presentation will discuss new improvement in methodology to evaluate the integrity of LLZO membrane.
This webinar will focus on the following key topics:
• Methodology to evaluate the integrity of LLZO by identifying the microstructural flaws and their impact on mechanical properties
• DC cycling, EIS, XPS will be shown to determine the reactions that govern the maximum current density
• Correlate the electrochemical stability and critical current density with defects in polycrystalline solid state LLZO electrolyte
Presenter
Asma Sharafi – PhD Student with Jeff Sakamoto at University of Michigan
Asma received her MS in Chemistry (material science) in 2013 at University of Georgia. Currently, she is a PhD student in Mechanical Engineering at University of Michigan under Jeff Sakamoto’s supervision. The primary focus of her research is on the development of new solid state electrolyte (SSE) with the garnet structure (Li7La3Zr2O12) that offer unprecedented safety and durability.
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Accelerating Launch of New Battery Technologies by Expediting Samples Through Collaborative Partnerships
Polaris is a processing lab that accelerates new lithium ion battery developments resulting in faster delivery of samples. It provides processing services to accelerate the optimization of recipes for battery developers. Using its services, customers can avoid delays in launching products due to internal funding and staffing constraints.
Services include anode and cathode electrode mix and coat trials, pouch stack cell assemblies, cell and material analytical testing services, business advisory services, and a link to high volume production.
Two major roadblocks facing battery technology companies are addressed: 1) Startups lack staffing, process knowledge, funding, and equipment to develop samples, and 2) Commercialization of new battery technologies is capital intensive and takes long time to pass quality standards
This webinar will focus on the following key topics:
• Significant new material inventions in lithium ion and other advanced battery chemistries in the US
• Two primary issues or “gaps” in getting these technologies to the market
– generating samples for investors, customers and internal engineering evaluation and optimization
– building a battery factory and gaining product and quality system approval (a huge undertaking)
• Polaris Battery Labs Capability Overview for samples and commercialization
• Partner Profile; Carestream Heath as a contract coating partner to reduce time-to-market and risks
Presenter
Doug Morris – CEO – Polaris Battery Labs, LLC
Doug has over 30 years experience in the telecommunications, components, battery, and energy storage industries. Prior to working at Polaris Labs he was VP of Operations at Enevate. Doug has also held various executive, management, and engineering positions over his 21 year career with Motorola where he was VP and Director of Engineering, Quality, and Supply Chain Management for the Energy Systems Group. Doug was also a founder of Motorola’s Product Testing Services business.
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Energy Storage RTE Tutorial Course 2/3: Ampere-Hour (Ah) RTE and Voltage Polarization Energy Losses
Many aqueous systems have water electrolysis to contend with, and above 70-80% SOC, RTE losses from this competing reaction can be significant. Management of these losses has been evolving for decades, and there are now tried and tested methods mostly related to charging algorithms & partial state of charge (pSOC) cycling. These methods will be reviewed. Relevant for every battery chemistry, Cell Voltage factors, will be separated into eight different components, four each, for the cathode and anode. These will be presented & described. The variables that affect them will be reviewed, including the effects of age & cycling and methods for their ongoing measurement. Techniques to reduce and mitigate polarization will be detailed & possible benefits will be quantified in terms of RTE & cost for different scenarios.
This webinar will focus on the following key topics:
• Ah Efficiency losses in aqueous systems
• Types of Voltage Polarization losses for all systems
• Strategies and plans for reducing & mitigating efficiency losses
• Improvement potential for different systems
Presenter
Dr. Halle Cheeseman – Founder/President at Energy Blues LLC
Dr. Halle Cheeseman earned a PhD in Electrochemistry & Corrosion from the University of Nottingham in UK, graduating in 1985. She has held several executive positions in the battery industry over the past 32 years, including Sr. VP of R&D at Spectrum Brands and VP of R&D at Exide Technologies. Her specific battery experience includes Lithium Ion, Zinc Air, Nickel Metal Hydride, Nickel Iron, Alkaline and Lead Acid, focusing on Consumer, Industrial, Automotive & Renewable Energy applications. In July 2017, Dr. Cheeseman founded Energy Blues LLC, an energy storage consulting cooperative comprising 20+ subject matter experts.
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