Application Article Center
Application Notes & Research Insights
Discover technical articles, application cases, and characterization methods for advanced battery development."
InterBattery 2026 | IEST Instruments to Showcase Advanced Battery Testing Solutions in Seoul
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...
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Pouch Cell DCR Testing: Component-Level Teardown Data for Direct Current Resistance
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...
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The Impact of PAA Binder on the Conductivity and Compression Performance of Silicon-Based Anodes
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...
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Quantifying and Analyzing 4680 Cylindrical Cell Expansion: An In-situ Study
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...
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eTransportation: IEST SWE2100 Enables the Inhomogeneous Degradation Mechanisms in LiFePO4/Graphite Pouch Cells Under Coupled Thermal and Electrical Stress
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)...
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How to Efficiently Screen Silicon-Based Anode Materials Using Expansion Thickness Measurement
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....
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How Battery Manufacturing Humidity Affects Electrode Sheet Resistance in Lithium-ion Batteries
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...
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How to Rapidly Evaluate Low Temperature Electrolyte Performance for Lithium-ion Batteries
1. Abstract This article presents a faster, more efficient method for screening low temperature electrolyte candidates. By measuring the separator ionic conductivity with different electrolytes across a temperature gradient, the...
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Accurate LFP Compaction Density Testing: A Guide for Compliance and Performance Optimization
Abstract LFP compaction density testing measures how densely lithium iron phosphate (LFP) powder packs under a defined pressure — typically evaluated at 220 MPa using a three-point method — and...
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Analysis of Electrode Sheet AB Side Resistance: Measuring Surface Resistance to Assess Coating Uniformity
1. Introduction: The Critical Role of Electrode Coating Uniformity Electrode foil surfaces — commonly referred to as the A-side (first coating) and B-side (second coating) — can differ subtly in...
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A Multi-Scale Analysis of Thermal–Overdischarge Coupling Aging in LFP Batteries
Abstract LFP batteries subjected to combined high-temperature and deep-overdischarge stress exhibit an aging mechanism with three distinct stages — activation, linear decay, and accelerated decay — and the DCIR (DC internal resistance) growth pattern shifts...
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IEST SEMS Characterization Solutions Enable Groundbreaking Research: Pressure-Free Silicon-based Anode Achieves 1000 Stable Cycles in All-Solid-State Batteries
Abstract A sSilicon-based anode all-solid-state battery (ASSB) operating without external pressure has been demonstrated for the first time at a practical scale, achieving 1,000 stable cycles at 2.5 mA cm⁻² with...
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