Description
High-Purity SWCNT Powders: Bulk Grades
Industrially produced single-walled carbon nanotube (SWCNT) powders combining high purity, low defect density, and very large aspect ratio (1-2 nm diameter, greater than 100 µm length). Manufactured at kiloton-scale capacity with tight batch-to-batch consistency, this series serves as the base material for conductive additives in lithium-ion, sodium-ion, and solid-state batteries, ESD/antistatic polymers, coatings, EMI shielding, and structural composites. It is intended for volume buyers formulating at production scale, not for gram-quantity lab screening.
Spec Table
| Grade | Code | Outer Dia. (nm) | Purity (wt%) | Length (µm) | SSA (m²/g) | IG/ID (Raman 532 nm) | Iron (ppm) |
|---|---|---|---|---|---|---|---|
| High Purity SWCNT | CTI5000 | 1-2 | 99.5 ± 0.5 | >100 | >800 | >60 | <5000 |
| High Purity SWCNT | CTI2000 | 1-2 | 99.5 ± 0.5 | >100 | >800 | >60 | <2000 |
| Super High Purity SWCNT | CTI600 | 1-2 | 99.5 ± 0.5 | >100 | >800 | >60 | <600 |
| Hydroxylated SWCNT | CTIH | 1-2 | >98 | >100 | >800 | N/A | N/A |
| Carboxylated SWCNT | CTIC | 1-2 | >98 | >100 | >800 | N/A | N/A |
| Aminated SWCNT | CTIN | 1-2 | >98 | >100 | >800 | N/A | N/A |
| SWCNT for Plastics & Rubber | CTIPP | 1-2 | >90 | >100 | >300 | N/A | N/A |
Test methods: Purity by TGA. Iron by ICP. Specific surface area (SSA) by BET. Characterization images (SEM, TEM) and Raman spectra supplied with each lot.
Grade Selection
- CTI600 (<600 ppm Fe): high-nickel NMC/NCA cathodes, solid-state composite electrodes, and cell designs sensitive to transition-metal dissolution.
- CTI2000: silicon and silicon-graphite anodes, sodium-ion electrodes, LFP cathodes, primer coatings for current collectors.
- CTI5000: general conductive additive, EMI shielding, cement and structural composites, thermal management.
- CTIH / CTIC / CTIN: water-borne dispersions, epoxy and polyurethane systems, covalent coupling to polymer matrices, 3D-printing inks.
- CTIPP: masterbatches and direct compounding in thermoplastics and rubber where 90% purity is sufficient.
Applications
- Silicon anode: 2 wt% SWCNT in pure silicon, coin half-cell at 0.5C: greater than 92% capacity retention after 100 cycles, Coulombic efficiency approximately 99.95%.
- Cathode (NMC, LFP): 0.1-0.5 wt% SWCNT builds a percolating conductive network, improving rate capability and cycle life versus carbon black or MWCNT.
- Dry-process electrodes: dry-blends with active material and PTFE binder, self-assembling into a 3D conductive network during fibrillation and calendering.
- Polymers: percolation at 0.05-0.2 wt% net SWCNT; permanent antistatic performance without carbon sloughing; enables colored and transparent ESD parts.
Handling
Black, low-bulk-density powder. Store sealed, dry, at room temperature. Disperse by high-shear mixing, bead milling, or probe sonication in NMP, water (with dispersant), or resin carriers. Use local exhaust and respiratory protection when handling dry powder; see SDS.
Packaging / Availability
Available from evaluation quantities through multi-ton annual supply agreements. ISO 9001 certified production. Each lot ships with a representative Certificate of Analysis; Raman, TGA, and SEM/TEM data available on request.
Representative Data
All values are representative of typical production and do not constitute a lot-specific guarantee. Certificates of analysis accompany each shipment.