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…
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 entire evaluation process can be completed in approximately 30 minutes,…
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 the result directly affects both battery energy density/cycle life and…
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 microstructure after coating and calendaring. Those subtle differences affect pore…
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 from linear to exponential at a specific inflection point that…
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 a capacity retention of 54.9% and a minimal volume expansion of only 14.5% —…
1. Article Information Article Name: In situ Crystal Structure Growth and Control for Enhancing Comprehensive Performance in Ultra-High Nickel-Layered Lithium Cathodes First Author: Yingshuang Sun Corresponding Authors: Ziwei Chen, Qinghua Zhang Affiliation: Zhejiang University Equipment used: IEST Single Particle Force Properties Test System(SPFT2000) 2.…
1. Introduction In lithium-ion battery production, controlling electrode moisture is critical, typically managed through parameters like temperature and time during drying to minimize its impact on performance. However, the internal physical and chemical properties of the electrode may undergo significant…
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