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Resource-Efficient Electrodes with Metallized Woven-Glass-Grid Current Collectors for Lithium-Ion Batteries. | LitMetric

AI Article Synopsis

  • A new type of current collector for Li-ion batteries, made from woven ultra-light glass threads, is introduced, saving over 90% of the required metals like copper and aluminum.
  • The design leads to significant weight reduction (over 80%) and improved battery performance, with increases in anode and cathode capacity, enhancing specific energy by 25%.
  • The fabrication process is fully demonstrated in coin cell format, showing impressive cycling durability (300 cycles, 93% capacity retention) and high efficiency (>99.9%), paving the way for innovative battery designs.

Article Abstract

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.

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Source
http://dx.doi.org/10.1002/cssc.202402233DOI Listing

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Article Synopsis
  • A new type of current collector for Li-ion batteries, made from woven ultra-light glass threads, is introduced, saving over 90% of the required metals like copper and aluminum.
  • The design leads to significant weight reduction (over 80%) and improved battery performance, with increases in anode and cathode capacity, enhancing specific energy by 25%.
  • The fabrication process is fully demonstrated in coin cell format, showing impressive cycling durability (300 cycles, 93% capacity retention) and high efficiency (>99.9%), paving the way for innovative battery designs.
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