Various defects can appear in the cell, introduced by material or process problems, assembly problems, and formation. This presentation will explore 3 measurements for early detection of defect structures in cells: 1. High Voltage Separator Defect Detection 2. Electrochemical Impedance Spectroscopy (EIS) 3. Direct Self-Discharge Measurement (SDM) Using a sophisticated physics-based model of the cell, these measurements can be analyzed and interpreted to determine if defect structures exist in the cell.

Solid-state batteries pose new challenges to the battery design due to the unique solid-solid interfaces at battery cathode and anode. However, these interfaces, upon critical understanding and design, also form the new opportunity to unlock advanced battery performances. We design the dynamic stability of the battery based on the mechanical constriction principle and the constrained ensemble computational description, demonstrating a stable cycling against the lithium dendrite penetration at performance-relevant conditions.

Solid state batteries hold great promise as a next-generation battery technology for automotive applications. This technology may be able to offer future electric vehicles improvements in cell level energy and safety characteristics. A review and comparison of this new emerging technology with that of existing liquid lithium ion batteries will be shown.

Claims of fast-charging batteries abound, but all are tied to specific temperature requirements. We have demonstrated temperature independent fast-charging and all-climate vehicle range in a chemistry agnostic fashion via the use of the thermally modulated cell design. In this talk, we will discuss how we decouple battery performance from the ambient condition and will present a vision of the future as the technology combines with solid-state and lithium metal systems.

SkyNano is producing high-performance, low-cost multiwall carbon nanotube (MWCNT) additives for lithium secondary batteries derived from CO2 direct air capture (DAC) and molten carbonate electrolysis.  This indirect electrochemical reduction of CO2 provides MWCNTs that may be easily blended with other carbon morphologies and offer advantages for cathode design from both an advanced processing and cell performance standpoint.  These key advantages are significantly reduced NMP usage, increased cathode areal capacity, higher cell capacity at high discharge rate, and extreme fast-charging assistance.

The current battery performance is limited by the conventional PVDF-NMP processing based cathode. Nanoramic has re-invented how electrodes are manufactured by completely removing PVDF binder (and the toxic NMP solvent) from the active layer of electrode. This dramatically improves Li-ion battery cell performance while decreasing the cost of manufacturing and the capital expenditures related to coating and drying, NMP solvent recovery.

The presentation will provide a comprehensive understanding of the cycle life effects of extreme fast charging (XFC, 10 to 15 min charging) on different variants of NMC (NMC532 and NMC811) cathodes using well-defined electric vehicle relevant Lithium-ion battery cells. The key cathode aging modes and mechanisms will be discussed, followed by potential pathways to mitigate them. While the two chemistries share similar aging pattern, their extent and resultant effects on cathode and/or battery performance found to be starkly different.

EnPower designs and manufactures multilayer electrodes that break away from the classic engineering trade-off between energy and power. Multilayer anodes with strategically designed porosity, tortuosity, and other profiles can facilitate rapid ion transport through the thickness of electrodes to balance the SOCs of materials and mitigate lithium plating. Multilayer electrodes improve fast charge cycling, reduce DCIR, and increase discharge performance without adding cost to the unit cell. You can learn more about EnPower's manufacturing process and expansions plans at www.enpowerinc.com

Breakthroughs in advanced Lithium-ion battery technology have been stagnant for decades. Enovix CTO, Ashok Lahiri, will share how the company has overcome roadblocks through years of R&D to produce the first 100% active silicon anode battery that is designed to deliver up to double the energy density of batteries in several categories of currently available devices.

Anode chemistry is rapidly evolving with anodes featuring metallurgical micro-silicon, silicon/carbon composites and silicon oxide all being considered as potential pathways to boost anode capacity. The integrity of the anode coating network is largely facilitated by the binder, which plays an even greater role when more silicon is incorporated. AnteoTech will present a cost-effective and unique approach for the use of a cross-linker additive (AnteoX) for pairing with water-based binders, achieving enhancements of the underlying base binder without complex chemical synthesis. The cross-linker additive strategy is applied to a high silicon content anode design demonstrating significant improvements in anode performance.

We report a novel impedance analysis method for quantifying the conductivity of electrons flowing through conductive materials in a Lithium-ion battery electrode slurry. This method consists of a novel algorithm that identifies three key indicators for the negative electrode slurry and describes the electrical properties of the electrode slurry. We demonstrated excellent correlation between our algorithm and experimental data derived from Nyquist (Cole-Cole) curves.

LiFePO4 (LFP) is a popular cathode material because of its low environmental footprint, intrinsic safety, high power capabilities, and potential for a low cost. We proposed an easily scalable synthesis method, it improves electrochemical proprieties, and has a low environmental impact and cost. Chilwee produces LFP batteries for e-bikes. In 2021, Chilwee Group achieved a gross sales of 1.6 billion dollars, and its overall strength will be ranked first among the top 10 battery manufacturers in China.