Abstract Dynamic EIS (DEIS) is an electrochemical measurement technique that captures battery impedance spectra in real time while the cell is actively charging or discharging — eliminating the steady-state requirement of conventional static EIS and revealing transient electrochemical phenomena that…
IEST Instruments, a leading provider of advanced lithium battery testing and automation solutions, is excited to participate in The 43rd International Battery Seminar 2026, one of the world’s most influential and longest-running events in the battery industry. The event will…
IEST Instruments, a leading provider of advanced lithium battery testing and automation solutions, made a strong impact on Day 1 of Battery Japan 2026 (the 20th International Rechargeable Battery Expo), one of the world’s premier platforms for rechargeable battery technology…
IEST Instruments Successfully Participates in InterBattery 2026, Empowering the Future of Battery R&D and Manufacturing. IEST Instruments, a leading provider of advanced lithium battery testing and automation solutions, made a strong impact at InterBattery 2026, one of the world’s premier…
Abstract Direct Current Resistance (DCR), also referred to as DCIR (Direct Current Internal Resistance), is a core metric that quantifies a lithium-ion battery’s total internal resistance under DC load, governing charge/discharge rate capability, heat generation, and safety. DCR is not a…
Abstract A PAA binder (poly(acrylic acid)) outperforms conventional CMC/SBR binder in silicon-carbon (Si/C) anode electrodes on two measurable, electrode-level properties: electrical conductivity and compression behavior. This study uses the IEST Electrode Sheet Resistance Tester (BER2500) to conduct a comparative evaluation…
1. The 4680 Format: Promise and the Expansion Challenge The 4680 cylindrical cell, championed by Tesla, represents a next-generation lithium battery technology. Its larger format (46mm diameter, 80mm height) aims to optimize energy density, power, and cost, reshaping the landscape…
Abstract Under coupled high-temperature and over-discharge (HO) conditions, commercial LiFePO4 Graphite Pouch Cells undergo severe nonlinear degradation with an acceleration factor of 2.5×, requiring only 40% of the equivalent full cycles (EFC) of normal conditions to reach 80% capacity retention. High temperature…
1. The Challenge: Managing Volume Expansion in High-Energy Anodes In the race for higher energy density, silicon based anode materials are unparalleled due to their significantly higher theoretical capacity compared to graphite. However, this “star” material has a well-known Achilles’ heel: severe…
Abstract Electrode sheet resistance is a critical parameter that determines a cell’s internal resistance, rate capability, and performance uniformity — and in large-scale manufacturing, ambient humidity is a key process variable that directly affects it. Differences in humidity control between production…
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