Literature appreciation: Influence of High Intensive Dry Mixing and Calendaring on Relative Electrode Resistivity Determined Via An Advanced Two Point Approach 1. Author Information and Article Abstract Bastian Georg Westphal from the Technical University of Braunschweig, Germany, introduced a fast…
1. Preface The method used in this article is a further improvement on the two-probe method. It adopts a four-wire method plus a controllable pressure double-disc electrode to test the battery electrode resistance, monitor the changes in the electrode resistance…
1. Introduction South Korean battery maker SK On has unveiled a voluntary layoff package and an unpaid-leave-for-study option as it seeks to cut costs and boost agility amid slowing electric vehicle (EV) demand. The measures affect more than 3,500 employees…
1. Abstract Electrode resistance is a sensitive, process-coupled metric that reflects slurry formulation, conductive-additive loading and calendering/compaction conditions. This study uses a controlled four-probe, pressure-applied measurement workflow (BER1300) to quantify how conductive-carbon content and compaction density affect the electronic conductivity…
1. Preface Lithium-ion (Li-ion) batteries have become one of the main energy storage solutions for the consumer, power and energy storage markets due to their long cycle life and high rate performance. Currently lithium-ion batteries still have challenges in reducing…
Abstract Battery cell consistency is one of the difficulties that major battery cell manufacturing companies are focused on. During manufacturing, fluctuations in materials, equipment, and environment produce minor cell-to-cell differences that are further amplified once cells are assembled into battery packs…
Abstract The MacMullin number (also spelled McMullin number; symbol \(N_m\), defined as \(N_m = \tau/\varepsilon = \sigma/\sigma_{eff}\)) quantifies effective ionic transport resistance inside porous battery electrodes — the ratio of electrode tortuosity \(\tau\) to porosity \(\varepsilon\), equivalently the ratio of…
1. Preface Copper and aluminum foils serve as essential current collectors in lithium-ion battery electrodes, conducting electrons and supporting the active material layer. Their chemical and electrochemical stability significantly impacts cell performance, including cycle life, rate capability, and safety. An ideal current collector combines…
Abstract LiFePO4 Cell swelling during charge/discharge can be characterized by two related but distinct measurements: thickness swelling (dimensional change under constant applied pressure) and swelling force (force generated under a fixed, constant gap). Using the IEST In-Situ Swelling Analyzer (SWE2110) on large-format LFP pouch cells, this…
1. Abstract The pursuit of higher energy density in lithium-ion batteries has positioned silicon as a promising next-generation anode material due to its high theoretical capacity. However, its practical implementation faces significant hurdles. In 2017, a team led by Jaephil…
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