High Performance Battery Materials

Cathodes, Anodes, and Electrolytes

Sublimed Sulfur Tapes

Cathode Electrode Sheets

Sulfur cathodes offer a high theoretical capacity of 1,672 mAh/g in a Li-S cell, which is an order of magnitude higher than those of the transition-metal oxide cathodes. The high capacity is based on the conversion reaction of sulfur to form lithium sulfide (Li2S) by reversibly incorporating two electrons per sulfur atom. Li−S cell consists of a lithium metal anode, an organic electrolyte, and a sulfur composite cathode, which leads to a theoretical cell capacity of 1,167 mAh/g. BE-70E has a practical capacity of at least 800 mAh/g. The discharge reaction has an average cell voltage of 2.15 V, resulting in a high theoretical gravimetric energy density of 2,509 Wh/kg at the cell level.

NANOMYTE® BE-70E is a cast electrode tape of Sublimed Sulfur powder. Standard electrode sheets are 5 inches x 10 inches (127 mm x 254 mm) and cast either single-sided or double-sided on 16 µm thick aluminum foil current collectors. NEI also offers custom tailored solutions for customers with unique specification requirements. Our tapes can also be customized to accommodate different active material loadings, coating thickness, binder type (aqueous/non-aqueous), and binder content, as well as choice of current collector.

Electrode Sheets Brochure

NANOMYTE® BE-70E Spec Summary:

  • Active Material: Sublimed Sulfur (S)
  • Current Collector: Aluminum (16 µm thick)
  • Tape Composition: 70% active material, 10% PVDF binder, 20% Super P
  • Sheet Size: 5 in x 10 in (127 mm x 254 mm)
  • Coating: Single or Double-sided sheets (as specified)
  • Areal Capacity: 3.0 mAh/cm2 ± 5% (per side)
  • Active Material Loading: 3.7 mg/cm2 ± 5% (per side)
  • Tape Thickness: 55 µm ± 5% (excluding current collector)
  • Nominal Voltage vs. Li/Li+: ~2.1V
  • Minimum Capacity: 700 mAh/g
  • Experimental Capacity: ≥ 800 mAh/g (1.9 – 2.7V @ 0.1C)

Available for Purchase

NEI’s standard* electrode sheets are available in ready-to-ship packages of 2, 5, and 10 sheets (per material). Bulk quantities are also available. Request a quote today!

*Standard electrode sheets are as specified on the spec sheet. Modifications in tape specifications (such as loading, thickness, binder, & collector) can be made for an additional fee.