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…
Abstract ASSB (All-Solid-State Battery) is an electrochemical energy storage device in which both electrodes and the electrolyte are solid-phase materials, eliminating the flammable liquid electrolyte used in conventional lithium-ion cells. External pressure in ASSB is a critical design parameter that controls interfacial contact…
1. Abstract Electrolyte filling is a critical step in lithium-ion cell manufacturing. Poor wetting increases internal resistance, reduces capacity, and can create localized current hotspots that promote lithium plating and separator penetration. This application note summarizes an X-ray-based, in-situ…
1. Introduction To enhance the energy density of lithium-ion batteries, advancements in both materials and manufacturing processes are essential. Silicon offers a theoretical specific capacity (~4,200 mAh·g⁻¹ as LixSi, x = 0–4.4) far higher than graphite (372 mAh·g⁻¹), so silicon-based…
1. Author Information and Article Abstract In 2020, DanielP. Abraham’s team used an electrochemical dilatometry to characterize the thickness expansion of silicon carbon composite anode electrodes, quantified the difference in electrode expansion when mixing different ratios of silicon-carbon, and analyzed…
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