Description
SWCNT Conductive Slurries for Battery Electrodes
Ready-to-use SWCNT conductive slurries formulated for cathode and anode coating lines, primer/undercoat application on Cu and Al foil, and tab coatings. SWCNTs are dispersed at high aspect ratio in NMP (with PVDF-compatible dispersant) or water (with CMC/aqueous binder compatibility). A small SWCNT dose builds a micro-conductive network that improves rate performance, cycle life, and electrode mechanical integrity while freeing active-material volume. Built for battery manufacturers and electrode-coating operations buying at production volume.
Product Forms
| Code | Medium | SWCNT Grade | Solids Content | Intended Use |
|---|---|---|---|---|
| CTIS-NMP | NMP | CTI600 / CTI2000 | To customer specification | NMC/NCA/LFP cathodes, PVDF systems |
| CTIS-AQ | Water | CTI2000 | To customer specification | Si, Si-graphite, and graphite anodes; Na-ion; foil primer coatings |
Applications
- Electrode conductive networks: coated on Li-ion and Na-ion cathodes and anodes for lower internal resistance, better rate performance, and longer cycle life.
- Silicon anodes: the flexible 3D SWCNT network buffers silicon volume expansion and prevents electrode pulverization during cycling.
- Current collectors: SWCNT composite coatings on Cu/Al foil reduce foil thickness, cut cell weight, improve active-material adhesion, prevent corrosion, and mitigate thermal-runaway risk.
- Key component coatings: conductive tab coatings reduce contact resistance.
- Solid-state batteries: improves solid-solid interfacial contact and both electronic and ionic conductivity in composite electrodes.
- Dry-process electrodes: compatible with low-solvent, high-compaction PTFE fibrillation; simplifies process and improves cycle life.
Silicon Anode Performance (Representative Data)
Cell test with 2 wt% SWCNT incorporated into pure silicon anode material. Coin-type half-cell cycling at 0.5C: greater than 92% capacity retention after 100 cycles, stable long-term cycling, Coulombic efficiency approximately 99.95%. In prelithiated silicon-oxide and CVD silicon-carbon full cells (3 A and 1.5 A discharge to 2.5 V, 75 °C cutoff), SWCNT-containing electrodes showed improved long-term capacity retention compared to cells without SWCNT.
Sodium-Ion Performance (SP+SWCNT vs. SP+MWCNT) (Representative Data)
| Formulation | Areal Density | Loading | Specific Capacity | -18 °C 6C 10s Pulse (V) | -30 °C 6C 10s Pulse (V) | Cycle Life 25 °C 2C 5000 cyc | Flexibility / Adhesion | Compaction |
|---|---|---|---|---|---|---|---|---|
| SP + MWCNT | 1.67 | 95% | 92.73 | 2.21 | 1.851 | >92.5% | NG / NG | ≤2.0 |
| SP + SWCNT | 1.80 | 96.75% | 93.3 | 2.310 | 2.024 | >91.18% | OK / OK | ≥2.05 |
| SWCNT advantage | +7% | +1.75% | N/A | +100 mV | +170 mV | N/A | Improved | +2% |
Voltage range 1.5-3.4 V. SWCNT also raised the -18 °C 100% SOC 6C pulse voltage by 80 mV. SWCNT cushions the larger volume change of sodium-ion electrode materials and prevents pulverization.
Carbon-Coated Aluminum Foil (SWCNT Slurry Reinforcement) (Representative Data)
| Base Foil (µm) | Single-Side Coating (µm) | Sample Width (mm) | Test Speed (mm/min) | Max Tensile Force (N) | Tensile Strength (MPa) |
|---|---|---|---|---|---|
| 4 | 0 | 15 | 20 | 5.05 | 67.34 |
| 4 | 1 | 15 | 20 | 10.87 | 144.95 |
| 4 | 2-3 | 15 | 20 | 20.25 | 270.11 |
MD-direction tensile strength improvement of up to approximately 200% on 4 µm Al foil; similar gains on 8 and 12 µm Al and 6/8 µm Cu foils. Enables thinner foils, higher energy density, and improved safety.
Dry Electrode Notes
- Extremely high aspect ratio forms a penetrating conductive path at low dosage, lowering internal resistance and improving rate performance.
- Fibrous structure adds bonding and reinforcement, addressing brittleness, powder shedding, and delamination at high compaction density.
- Good compatibility in mixing, film-forming, and rolling; low dosage and high utilization raise energy density.
Handling
Store sealed at 5-30 °C; re-disperse by gentle stirring before use. Shelf life 6 months sealed. See SDS for solvent handling (NMP grade).
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.