Abstract Battery self-discharge is the spontaneous capacity and voltage loss of a lithium-ion battery under open-circuit conditions — a critical performance parameter for cell quality, consistency screening, and long-term storage reliability. The three conventional self-discharge measurement methods — direct capacity loss measurement, open-circuit…
IEST Instruments, a leading provider of intelligent lithium battery testing equipment and laboratory automation solutions, is making a powerful impact at The Battery Show Europe 2026. Held from June 9 to 11, 2026, at Messe Stuttgart, this premier trade show…
Abstract A recent study published in Nano Materials Science by researchers at Beijing Institute of Technology systematically investigates how mechanical pressure regulates interfacial stability and failure mechanisms in LFP/graphite battery. Comparing cells cycled at 0 MPa (unpressurized) and 0.1 MPa (pressurized), the study found that moderate pressure…
Abstract Tianjin, March 23, 2026 — The Nanoyang research group at Tianjin University and IEST Instrument (Xiamen) jointly announced the official launch of their Joint Laboratory at a ceremony held on the Tianjin University campus. The event brought together distinguished experts from across China’s new energy materials community, including…
Abstract Battery cell swelling — the volumetric expansion of lithium-ion cells during charge and discharge from lithium-ion intercalation, gas evolution, and temperature changes — is directly coupled to the mechanical behavior of buffer foam when foam is present between cells…
Abstract Distribution of Relaxation Times (DRT) analysis is a mathematical deconvolution technique that converts electrochemical impedance spectroscopy (EIS) data from the frequency domain into a time-domain distribution function \(\gamma(\tau)\)— separating overlapping electrochemical processes into distinct peaks based on their characteristic…
Abstract Longitudinal binder migration during the drying process creates compositional stratification that directly impacts the electrochemical performance, adhesion strength, and cycle life of lithium-ion batteries. Traditional manual scraping methods lack the spatial resolution and depth accuracy required to accurately map…
1. What Is Electrode Characterization and Why Does It Matter? Electrode characterization in lithium-ion batteries refers to the systematic, quantitative evaluation of an electrode sheet’s electrical conductivity distribution, electrolyte wettability, and mechanical integrity to predict cell-level performance. Inadequate electrode uniformity,…
Abstract Specific capacity in coin cell testing is the electrical charge released by an electrode material per gram of active material, calculated as Specific Capacity (mAh/g) = Capacity (mAh) ÷ Active Material Mass (g) — for example, 1,000 mAh from a 10 g…
Abstract The relationship between SOH (state of health) and degradation modes is that as a lithium-ion cell ages and its SOH declines, irreversible expansion force and displacement increase steadily and cumulatively, because SEI growth, electrode plastic deformation, and micro-structure compaction each…
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