LC75 Cathode Active Material

Overview

TOB-LC75 (S/C75) is a sulphur–carbon composite cathode active material designed for lithium–sulfur (Li–S) battery research where high specific capacity and improved sulphur utilisation are required. In Li–S cells, elemental sulphur (S₈) undergoes multi-step electrochemical conversion through soluble lithium polysulfides to form Li₂S during discharge, and reverses during charge. The carbon matrix provides electronic conductivity and helps physically confine sulphur/polysulfides, supporting more stable cycling and rate behaviour.

Key material specifications

• Sulphur content: 75 wt% (customisable typically within ~30–80 wt% by request)
• Particle size distribution: D10 ≈ 5 µm, D50 ≈ 15 µm, Dmax/D90 ≈ 33 µm
• Tap density: ~0.37 g/cm³
• Form: free-flowing black composite powder
  
  

Reported electrochemical performance (typical Li–S conditions)

• CR2032 coin cells:

  • 0.1C: ~1180 mAh/g initial; ~1000 mAh/g after 50 cycles (ongoing testing)

  • 0.2C: ~1090 mAh/g initial; ~860 mAh/g after 100 cycles

• Pouch cell (high-energy format): ~1200 mAh/g initial; >80% retention after 70 cycles (reported at ~400 Wh/kg cell level)
  
  

Compatibility and applications

S/C75 is commonly formulated with conductive carbon and PVDF-style binders, and paired with LiTFSI-based ether electrolytes (e.g., DOL/DME) with LiNO₃ additives for shuttle suppression studies. Typical use cases include:

• Li–S cathode optimisation and electrolyte screening
• Polysulfide-shuttle mitigation research
• High-loading cathode studies and pouch-cell translation
  
  

Why ScienceGears: local AU/NZ supply support plus practical integration guidance with battery cyclers, potentiostats/EIS, and coin-cell or pouch-cell R&D workflows for reliable, research-grade battery testing.