Li Yen-Ming, Momeni Mohammadjafar, Dang Duc Huy Nguyen, von Bahder Suvi, Roth Friedrich, Münchgesang Wolfram, Danziger Manfred, Voitus Winfried, Nuss Dominik, Sennewald Cornelia, Leisegang Tilmann
Institute of Experimental Physics, TU Bergakademie Freiberg, Leipziger Str. 23, 09599, Saxony, Freiberg, Germany.
elfolion GmbH, Quedlinburger Str. 14, 06485, Sanxony-Anhalt, Quedlinburg OT Gernrode, Germany.
ChemSusChem. 2025 Mar 15;18(6):e202402233. doi: 10.1002/cssc.202402233. Epub 2024 Dec 3.
A novel class of resource-efficient, woven-glass-grid current collectors (CCs) for Li-ion batteries is introduced. These CCs are based on ultra-light multifilament glass threads, woven to a grid and surrounded with a thin metal layer (equivalent to a 1 μm-thick metal foil) in a roll-to-roll physical vapor deposition process. This saves >90 % of the required Cu and Al metals and reduces the mass of the CCs by >80 %. At the same time, the gravimetric capacity of anodes with graphite and cathodes with LiCoO active material increases by 48 % and 14 %, respectively, while full cells are characterized by an increase of 26 %. Thus, the specific energy can be improved by 25 %. A complete anode and cathode fabrication process from preparing the CCs and electrodes to cells is described and demonstrated in coin cell format. Coin cells with woven-glass-grid CCs achieved 300 cycles with a capacity retention of 93 %, a Coulombic efficiency of >99.9 %, and a higher rate capability until a C-rate of 3 C. This technology opens up new possibilities for designing ultralight CCs with dedicated surface properties for Li and beyond Li batteries.
介绍了一种用于锂离子电池的新型资源高效型编织玻璃网格集流体（CCs）。这些集流体基于超轻复丝玻璃丝，编织成网格，并在卷对卷物理气相沉积过程中被一层薄金属层（相当于1μm厚的金属箔）包围。这节省了超过90%所需的铜和铝金属，并使集流体的质量减少了80%以上。同时，使用石墨的阳极和使用LiCoO活性材料的阴极的重量容量分别增加了48%和14%，而全电池的重量容量增加了26%。因此，比能量可提高25%。描述并展示了从制备集流体和电极到电池的完整阳极和阴极制造工艺，采用扣式电池形式。使用编织玻璃网格集流体的扣式电池实现了300次循环，容量保持率为93%，库仑效率大于99.9%，并且在3C的倍率下具有更高的倍率性能。这项技术为设计具有用于锂及锂以外电池的特定表面特性的超轻集流体开辟了新的可能性。
