SPAN Cathode Powder for Li-S Batteries | 550–800 mAh/g

Name: SPAN Cathode Powder (Sulfurized Polyacrylonitrile) for Li-S Batteries
Product Type: Lithium-Sulfur Cathode Active Material (SPAN)
Product Code: XN-SPAN
SKU: SPAN-LSB
Brand: Xnergy Materials

Product Introduction:

SPAN Cathode Powder is a battery-grade, sulfur-rich composite active material for lithium-sulfur (Li-S) batteries. It is created by heating polyacrylonitrile (PAN) and elemental sulfur together at high temperature (typically 300 °C to 450 °C), which chemically grafts sulfur onto a conductive polymer backbone so that no soluble polysulfides are formed. As a result, SPAN is fully compatible with standard carbonate electrolytes — like those used in regular Li-ion cells — without any expensive additives. SPAN typically offers a reversible capacity of 550–800 mAh/g (based on the total composite mass): lower than the theoretical limit of pure sulfur (1675 mAh/g), but significantly higher than standard NMC cathodes (~200 mAh/g), making it a practical route to high-energy, high-safety lithium-sulfur batteries.

Key Features:

Sulfur chemically grafted onto a conductive polymer backbone — no soluble polysulfides formed
Fully compatible with standard carbonate electrolytes, no expensive additives required
Reversible capacity of 550–800 mAh/g — far above standard NMC cathodes (~200 mAh/g)
High first-cycle Coulombic efficiency of 99.0% with a stable 1.7–1.8 V discharge plateau
Consistent fine particle size for reproducible electrode coating
Suitable for coin, pouch, and prismatic cell formats

Key Specifications:

Application Areas:

Lithium-sulfur (Li-S) battery cathode development and research
Coin, pouch, and prismatic cell prototyping
High-energy-density batteries for UAV/drone, eVTOL, and HAPS platforms
Lightweight portable energy storage and aerospace battery R&D
University, research-institute, and industrial next-generation battery programs

Packaging & Storage:

Supplied in vacuum-sealed aluminum-plastic bags or HDPE containers
12-month shelf stability when sealed and kept in cool, dry conditions
Store away from moisture, heat, and direct sunlight
Reseal promptly after use to preserve material quality

Specifications are provided for reference and may be adjusted to suit specific research requirements. Configuration and options are specified at order time.

Note: SPAN Cathode Powder gives Li-S researchers a stable, carbonate-compatible cathode active material with no soluble polysulfides and a reversible capacity of 550–800 mAh/g. Prefer ready-coated electrodes? See our SPAN Cathode Electrode Sheet. Need a fully assembled cell? The SPAN Dry Pouch Cell pairs the same SPAN cathode with a lithium-metal anode. Explore more Cathode Materials for battery research.