The interplay between electrochemical and mechanical properties influences the nanoscale charge distribution in battery particles and their contributions to the overall battery capacity. Crystallographic defects such as dislocations and grain boundaries have a huge impact on the charging behavior and mechanical properties of single-crystal and polycrystalline battery particles. This presentation covers our recent progress in probing and designing defect chemistries to improve Li-ion cathode materials, including NMC811 and LNO.

In general, current material fabrication guidance for novel designs of Si/C composite particle materials focuses on electrochemical behavior and redox reactions at the nano/micro level. However, such guidances cannot provide detailed information for predicting mechanical deformations of the composite particles. Here, we establish an electro-chemo-mechanical model and implement it to quantitatively analyze
the multiphysics behavior of five representative Si/C composite nanostructures.

Ultrathin ALD coating method has shown promises for Li-ion batteries performance improvement such as suppression of transition metal dissolution and degassing, cyclability improvement and lower area selective impendence scattering.  This presentation covers ALD/CVD precursor vapor phase processing for battery components (e.g. anode, cathode and solid state electrolytes). Additionally I will also present our recent work on fundamental studies of ALD Al2O3 and AlF3 ultrathin coatings on various battery base materials.

The vast majority of work on solid-state is based around oxide, sulfide or polymer electrolytes. While deposition processes are well-established for fabrication of micro-batteries, they are not currently considered economically viable for high-capacity batteries. Novel technology from Demaray LLC is changing that, showing that high energy density and long cycle life cells made by deposition processes can be cost-effective – this new approach is poised to disrupt several key markets.

Ceramic-filled separators offer extremely low impedance in combination with excellent wettability. In contrast, ceramic-coated separators provide excellent in-plane, high temperature dimensional stability in combination with shutdown of the polyolefin base separator. This work examines the influence of ceramic filler and coating compositions, particle size distributions, and loading levels on the thermomechanical and electrical properties of battery separators designed for large format Li-ion or rechargeable Li-metal based cells.

In developing new electrolytes for lithium-ion and next-generation batteries, there is a need to develop innovative separator solutions to maximise cell performance and, where possible, address safety aspects surrounding the interaction between the electrolyte and electrodes. In this presentation, we will discuss some of our work on the development of innovative separators, thermal studies of electrode | electrolyte combinations and the implications for cell safety.

Successful design and manufacturing of advanced battery technologies depend heavily on accurate and thorough characterization of thermal and structural performance. While thermocouples and other traditional methods can provide the minimal measurements needed, fiber optic sensors offer advanced capabilities with unmatched data coverage, usability and safety. Learn how distributed fiber optic sensing systems can be deployed within cells, packs and modules to deliver new levels of critical data and insight.

Electrolytes from lithium-ion battery cells of field-tested electric vehicles of several original equipment manufacturers were investigated by complementary analytical techniques, giving insights into the feasibility of analysis electrolytes beyond the lab-scale. The application of a whole series of established analytical methods allowed to comprehensively analyze LIB electrolytes and provided reliable conclusions about the different cell chemistries.

Lithium-ion batteries have become ubiquitous in daily life, finding use for an increasingly wide range of applications. As their intended uses become more diverse, so too do the specifics of cell design. This presentation will discuss the oxidative stability and reaction behaviour of electrolyte solutions for faster charging and more energy-dense cell designs.

Battery testing simplified for new and non-technical people supporting the battery industry.  Topics covered include the differences between Resistance and Impedance, Electrochemical Impedance Spectroscopy (EIS) and Direct Current Internal Resistance (DCIR) and many more topics.