This is the third in a series of posts from the IEEE Spectrum article, “How to Build a Safer, More Energy-Dense Lithium-ion Battery,” authored by Ashok Lahiri, Nirav Shah, and Cam Dales of Enovix. The article describes and illustrates how thermal runaway can occur in a conventional Li-ion battery. The polymer separator is an inactive material and has to be physically longer and wider than the electrodes to make sure

The Institute of Engineering and Technology (IET) traces its heritage to 1871. Today its mission is to, “inspire, inform and influence the global engineering community, supporting technology innovation to meet the needs of society.” E&T (Engineering and Technology) is the IET’s award-winning monthly magazine and associated website for professional engineers. E&T recently published an article by Holly Cave titled, “Charging ahead: the bid for better EV batteries.” The article’s premise

The last few months of 2016, I wrote several posts about lithium-ion safety issues. This included reporting on the cost of the Samsung Galaxy Note 7 failure, and that it was just the latest in a series of high-profile lithium-ion battery mishaps. Previously, I had written about how Li-ion battery safety problems were the legacy of Sony’s decision to repurpose audio cassette magnetic recording tape equipment for battery production in

On Friday, November 18, I had the privilege of participating on a panel at the 2016 Bay Area Battery Summit: Energy Storage at Inflection Point. The one-day summit, organized by CalCharge and SLAC National Accelerator Laboratory, addressed fundamental questions about energy storage Research, Development, Demonstration and Deployment (RDD&D). I was a member of the “Innovation in Energy Storage Panel,” moderated by Brian J. Bartholomeusz, Executive Director Innovation Transfer at Stanford

I’ve written several posts over the past two months about the Galaxy Note 7 battery fires that led Samsung to remove it from the market. In my prior post, I reported, from a Wall Street Journal article, that “investors have shaved off roughly $20 billion in Samsung’s market value. The company has said the recall would cost it $5 billion or more, including lost sales.” The big question now is

It’s been a rough month for Li-ion smartphone batteries. I’ve chronicled the unfortunate events Samsung has experienced with its Galaxy Note 7 smartphone in prior posts: Samsung is Just the Latest and The Cost of Battery Failure. The October 24 issue of The Wall Street Journal provides the latest update in its article, “The Fatal Mistake That Doomed Samsung’s Galaxy Note.” Fear: Samsung Incident Triggers a Wide-Ranging Inquiry into Li-ion

Last month I wrote about Samsung recalling about 2.5 million Galaxy Note 7 smartphones. At the time, I noted that the Samsung predicament was just the latest in a string of Li-ion battery detonations that had affected a wide-range of mobile products, including hoverboards, portable computers and even large-passenger aircraft. However, the Samsung situation has now become a fiasco, at considerable cost to the company. But before I elaborate on

BUILDING A BETTER BATTERY is a series that started in response to a reader’s comment about the length of time it’s taking to commercialize our 3D Silicon™ Lithium-ion Rechargeable Battery. Part One benchmarked the most recent battery breakthrough, and presented an explanation as to why there has been no significant advancement in battery performance over the past quarter-century. Part Two benchmarked product breakthroughs essential to modern mobility—ICs, LEDs and LCDs—that

I’m going to deviate from the series I began with my last post to address the timely topic of battery safety. I’ll return to why it’s taking so long to build a better battery next week. Last week Consumer Reports published an online article about Samsung Note 7 smartphones catching fire while charging. Over the Labor Day weekend, major media, including The Wall Street Journal, reported that “Samsung Electronics is

The Enovix 3D cell architecture also provides several safety features not obtainable with a conventional Li-ion battery structure (see illustration below). Safety features of Enovix 3D cell architecture (source: Enovix Corporation) The Enovix cell architecture allows for a ceramic separator that tolerates higher temperatures than the polymeric separator in a conventional Li-ion battery. Excess capacity in the Enovix patented silicon anode reduces risk for lithium metal plating during overcharge conditions.