Covalently Functionalized Multi-Wall Carbon Nanotubes (MWCNTs, >99%) as Conductive Electrode Additive, 10 g/bottle, CCEACFMWCNT
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Covalently functionalized Multi-Wall Carbon Nanotubes (MWCNTs) are a robust and cost-effective alternative to single-walled versions for improving the conductivity and mechanical stability of electrodes. While SWCNTs offer higher theoretical conductivity, MWCNTs are more resilient to the harsh chemical processing required for covalent functionalization. In electrochemical applications, these additives are used to create a persistent 3D conductive scaffold that remains intact throughout thousands of charge/discharge cycles.
As an additive, covalently functionalized MWCNTs address three main bottlenecks: (1) Percolation at Low Loading: Because the functional groups prevent clumping, MWCNTs can achieve a "percolation threshold" (the point where a continuous conductive path is formed) at much lower concentrations—often 0.5-1.5 wt%. This leaves more room in the electrode for active material, increasing the overall energy density. (2) Interfacial Resistance: The covalent groups provide a chemical "bridge" between the carbon nanotubes and the active material particles. This reduces the Contact Resistance, allowing electrons to flow more easily from the active site to the current collector, which is crucial for fast-charging applications. (3) Electrolyte Accessibility: Untreated MWCNTs are hydrophobic. Functionalized MWCNTs (especially those with -OH or -COOH groups) improve the "wettability" of the electrode. This ensures that the electrolyte can penetrate the dense electrode structure, reducing the Ionic Resistance.
| Part Number |
CCEACFSWCNTH |
CCEACFSWCNTC |
CCEACFSWCNTA |
CCEACFSWCNTG |
| Functionalization Group |
Hydroxyl (-OH) |
Carboxyl (-COOH) |
Amino (-NH2) |
Graphitization |
| Outer Diameter |
10-15 nm
|
8-15 nm
|
8-15 nm
|
8-15 nm
|
| Inner Diameter |
5-8 nm
|
3-5 nm
|
3-5 nm
|
3-5 nm
|
| Length |
2-8 um
|
5-15 um
|
8-15 um
|
5-15 um
|
| Density |
0.09 g/cm3
|
0.10 g/cm3
|
0.15 g/cm3
|
0.09 g/cm3
|
| Surface Area |
>190 m2/g
|
>190 m2/g
|
>210 m2/g
|
230-270 m2/g
|
| Functionalization group content |
1.0 mmol/g |
1.0 mmol/g |
0.7 mmol/g |
- |
| Package Size | 10 g/bottle | 10 g/bottle | 10 g/bottle | 10 g/bottle |
Notes: Please try to store the covalently functionalized MWCNT powder in a dry place.
References:
- X. Tang, et al. Functionalized carbon nanotube based hybrid electrochemical capacitors using neutral bromide redox-active electrolyte for enhancing energy density, J. Power Sources, 2017, 352, 118-126.
- V. Pifferi, et al. Multi-Walled Carbon Nanotubes (MWCNTs) modified electrodes: Effect of purification and functionalization on the electroanalytical performances, Electrochimica Acta, 2014, 146, 403-410.