
Electrochemical Impedance Spectroscopy and Its Application to Battery Analysis
Electrochemical Impedance Spectroscopy (EIS) is a well-established experimental technique that has applications in coatings, corrosion, sensors, electrochemical double layer capacitors, batteries among others. The power of EIS partly comes from its ability to access a very wide range of frequencies (typically from MHz to μHz). For batteries, parameters such as the internal resistance, electrode surface capacitance and leakage are accessible at different frequencies across the spectrum. This allows EIS to gather all the relevant information with a single measurement. In this webinar, we will briefly introduce EIS and cover its application to batteries. We will talk about how to analyze typical data and how to gather the relevant information. We will further talk about available instrumentation and their limitations.
This webinar will focus on the following key topics:
• What is impedance spectroscopy?
• What can impedance spectroscopy do for Battery analysis?
• How can capacitance, internal resistance and leakage be determined using EIS?
• What are the instrumental requirements and limits?
Presenter
Chris Beasley – Gamry Instruments
Chris Beasley received a BS in Chemistry from Kutztown University in 2000 and got a PhD in electrochemistry from University of North Carolina at Chapel Hill in 2010. His doctoral dissertation was on using redox-active nanoparticles as supercapacitors. Chris joined Gamry Instruments in 2010.
Buy Now

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.
Buy Now

Preventing Li Ion Battery Failures From a Manufacturing and Design Perspective
How can you be proactive and make sure your cell supplier is the right one and you don’t end up with thermal events and field failures? Is it enough to qualify a cell manufacturer according to industry standards? The answer is that the majority of compliance based testing is related to abuse tolerance. However, the vast majority of field failures do not occur under abuse scenarios, but happen under normal operating conditions due to manufacturing flaws or design and system tolerance issues that cause internal shorts. In this webinar, you will learn about common lithium ion battery failure modes and how to be proactive in preventing these.
This webinar will focus on the following key topics:
• Gain an understanding of lithium ion battery failure mechanisms and the pathway to thermal events
• Learn how cell design impacts battery safety and reliability
• Learn the basic steps in a lithium ion cell manufacturing process, and how the process controls affect safety and reliability
• Come away with a checklist to qualify your cell manufacturer
Presenter
Vidyu Challa – Technical Director at DfR Solutions
Vidyu Challa is Technical Director at DfR Solutions where she works on battery reliability and safety issues. Dr. Challa helps customers with their battery challenges including design reviews, manufacturing audits and supplier qualification. She obtained a PhD from CALCE Electronic Products and Systems Center at the
University of Maryland. She has broad based expertise that includes engineering technology start-up experience, product development, R&D, and business development. Dr. Challa has published her work in journals, presented at conferences and written blog articles.
Buy Now

Maximizing Battery Performance and Reliability for Electric Vehicles and Energy Storage
FREE Webinar – Voltaiq is a proud sponsor of this event.
As automakers and utilities transition away from non-renewable energy sources, batteries have become essential for efficient energy storage and delivery. Companies are working intensely to deliver higher capacity and more robust batteries to power their products, but ad hoc development processes cannot keep pace with the volume of battery data being generated. In addition, understaffed battery development teams are unable to leverage their data to accelerate development or improve production and manufacturing.
In this webinar, we will outline the challenges that the battery industry is facing and how big data analytics can virtually eliminate manual data management and provide powerful capabilities that deliver rapid insights into a battery’s design that dramatically accelerate the development process and results in products with greater performance and reliability.
This webinar will focus on the following key topics:
• Recognizing the challenges and bottlenecks in battery development today
• Automating the battery data collection, data cleaning, and data management process
• Identifying design issues earlier with predictive analytics
• Leveraging metadata to understand the impact of materials, processes and test conditions
Presenter
Dr. Tal Sholklapper – Co-Founder and CEO at Voltaiq
Dr. Tal Sholklapper is a co-founder of Voltaiq and serves as the company’s Chief Executive Officer. Before co-founding Voltaiq, Dr. Sholklapper was the lead engineer on a DOE ARPA-E funded project at the CUNY Energy Institute, developing an ultra-low-cost grid-scale battery. Prior to his work at CUNY, Tal co-founded Point Source Power, a low-cost fuel-cell startup based on technology he developed while at Lawrence Berkeley National Laboratory (LBNL) and UC Berkeley. Dr. Sholklapper has a BS in Physics and Applied Mathematics and an MS and PhD in Materials Science and Engineering from UC Berkeley.
Buy Now