Self-Standing Graphene Electrode (L100mm * W100mm * T25um) for Supercapacitor and Battery, CSBSSGE
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A self-standing graphene film (also known as "graphene paper") is a macro-scale, binder-free architecture that acts as both the active storage material and the current collector. By eliminating heavy metal foils (Cu/Al) and non-conductive polymer binders, these films drastically improve the gravimetric energy density of electrochemical devices.
Unlike traditional slurry-cast electrodes, self-standing films offer structural and electrical advantages: (1) High Conductivity: The continuous overlapping of graphene sheets provides a low-resistance path for electrons (>2.0*10^5 S/cm) in high-quality films). (2) Flexibility: They can be bent, folded, or rolled without cracking, making them essential for wearable electronics and foldable batteries. (3) Rapid Ion Diffusion: When engineered with hierarchical pores, they provide "ion highways," significantly reducing the diffusion distance compared to thick, dense graphite. (4) Synergistic Composites: They act as a 3D conductive "scaffold" for host materials like Silicon (Si) or Metal Oxides (MnO2), accommodating their volume expansion and preventing mechanical failure.
For supercapacitor application, self-standing graphene films are the "gold standard" for high-power capacitors. (1) Performance: They can reach volumetric capacitances of 130 F/cm3 and maintain stability over 20,000 cycles. (2) Mechanism: They utilize Electric Double-Layer Capacitance (EDLC). To increase energy, these films are often doped with Nitrogen (N) or Boron (B) to introduce pseudocapacitive redox sites.
In battery application field, (1) Anode: Pure graphene films can provide capacities of 450–700 mAh/g. (2) Folded Architectures: Recent research shows that folding these films (like origami) increases areal loading without sacrificing the fast electron transport paths, allowing for capacities that exceed commercial graphite (>4.0 mAh/cm^2).
| Part Number |
CSBSSGE (C-SB-SSGE) |
| Fabrication Processes |
Graphene oxide was adopted as raw material, which was went through steps of film coating, pre-reduction, graphitization, and press. |
| Effective Electrode Area |
100 mm * 100 mm
|
| Electrode Thickness | 25 um |
| Electrical Conductivity |
2*10^-5 S/m
|
| Tensile Strength |
~35 MPa
|
| Package Grade |
1 pcs/pack |
Notes: Please try to store the self-standing graphene electrode sheet in a dry place and do vacuum drying (90-100 °C) for 12-24 h.
References:
- G. A. Ferrero, et al. Free-standing hybrid films based on graphene and porous carbon particles for flexible supercapacitors, Sustainable Energy Fuels, 2017, 1, 127-137.
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H. Sun, et al. A self-standing nanocomposite foam of polyaniline@reduced graphene oxide for flexible super-capacitors, Synthetic Metal, 2015, 209, 68-73.