Coated current collector for battery performance improvement (CONTACT)

集电器是电池的关键部件。用于桥接电池和外部电路，它们负责电池负极和正极端子（电极）之间的电子流动，这直接影响充电速率能力，电池容量和电池的使用寿命。不幸的是，市场上存在粘附性差、降解率高、腐蚀严重和接触电阻增加的问题。今天，裸铝通常用作集电器，然而，碳涂层集流体由于在能量和功率密度方面的性能优势而越来越受欢迎。该项目旨在验证GNN涂层技术在连续卷到辊压环境下再生产圆柱形电池的性能。该项目建立了一个以英国为基地的价值链，将通过与所有利益相关者的合作，提高GNN在英国生产设施的制造准备水平。创新的涂层集流体改善了电池材料和箔之间的粘附和接触，从而提高了竞争对手的性能。此外，该技术采用快速、低能耗的工艺生产，大大降低了生产成本。GNN的专有配方使用有机聚合物、粘合剂和导电材料，以降低接触电阻、防止腐蚀并增加附着力。这些优势使电池行业在EV应用方面更具竞争力和可持续性，但也适用于需要高电气性能的移动的设备和储能系统。

Current collectors are a critical component of a battery. Used to bridge batteries and external circuits, they are responsible for the flow of electrons between the negative and the positive terminals of the battery (electrodes), which directly influence the charge rate capability, battery capacity and the useful lifespan of the cell. Unfortunately, the market suffers from poor adhesion, high degradation, severe corrosion issues, and increased contact resistance.Today, bare aluminium is typically used as current collector, however, carbon-coated current collectors are increasing in popularity due to the performance advantages offered in energy and power density.This project aims to validate GNN-coatings technology in a continuous roll-to-roll environment and then produce cylindrical cells the performance. Having established a UK-based value chain, the project will increase GNN's manufacturing readiness level of production facilities in the UK by engaging all stakeholders.The innovative coated current collector improves adhesion and contact between the battery material and foil, enabling increased performance over competitors. Further, the technology which is produced using a rapid and low-energy process lowers production costs significantly.GNN's proprietary formulation uses organic polymers and binders and conductive material to reduce contact resistance, prevent corrosion, and increase adhesion. These advantages make the battery industry more competitive and sustainable for EV applications but also for mobile devices and energy storage systems requiring high electrical performance.