Supercapacitor

Supercapacitors store charge at the electrode-electrolyte interface rather than through bulk redox, trading energy density for power density, cycle life, and millisecond-scale response. This discipline node groups the experimental work that sits between batteries and dielectric capacitors: electric double-layer capacitors (EDLCs), pseudocapacitors, and hybrid (battery-type plus capacitor-type) cells.

Researchers in this area span three overlapping families of devices:

EDLCs — non-faradaic charge storage on high-surface-area carbons (activated carbon, carbide-derived carbon, templated carbons, graphene, CNTs) in organic, aqueous, or ionic-liquid electrolytes.
Pseudocapacitors — fast surface or near-surface faradaic processes on transition-metal oxides (RuO2, MnO2, Nb2O5), nitrides, and conducting polymers (PEDOT, PANI, PPy).
Hybrid devices — one battery-type electrode paired with one capacitor-type electrode, including lithium-ion capacitors (LICs), sodium-ion capacitors, and aqueous zinc- or nickel-based hybrids.

Standard characterization is electrochemical: cyclic voltammetry to separate capacitive from diffusion-controlled current, galvanostatic charge-discharge for capacitance and energy/power, and electrochemical impedance spectroscopy for ESR and time-constant analysis. Long-cycle and float-voltage testing matter more here than in most battery work because the value proposition of the device is lifetime and rate.

Material selection is driven by accessible surface area, pore-size matching to electrolyte ion size, and stability window — wider potential windows in acetonitrile- or ionic-liquid-based electrolytes raise energy density at the cost of conductivity and cost.

Supporting materials and equipment for this discipline — carbon powders, current collectors, separators, binders, organic and ionic-liquid electrolytes, coin and pouch cell hardware, and potentiostats — are distributed across the rest of the catalog under their respective material and equipment collections.

Vapor Grown Carbon Fiber (VGCF-H) Powder as Conductive Electrode Additive, 10 g/bottle, CCEAVGCFHP

Vapor Grown Carbon Fiber (VGCF-H) Powder as Conductive Electrode Additive, 10 g/bottle, CCEAVGCFHP

Vapor Grown Carbon Fiber (VGCF-H) Powder as Conductive Electrode Additive, 10 g/bottle, CCEAVGCFHP

$59.00
Graphene Powder as Conductive Electrode Additive, 50 g/bottle, CCEAGP

Graphene Powder as Conductive Electrode Additive, 50 g/bottle, CCEAGP

Graphene Powder as Conductive Electrode Additive, 50 g/bottle, CCEAGP

$99.00
Graphene Slurry as Conductive Electrode Additive, 100 g/bottle, CCEAGS

Graphene Slurry as Conductive Electrode Additive, 100 g/bottle, CCEAGS

Graphene Slurry as Conductive Electrode Additive, 100 g/bottle, CCEAGS

$59.00
Single-Wall Carbon Nanotubes (SWCNTs, OCSiAl) Powder as Conductive Electrode Additive, 5 g/bottle, CCEASWCNTP

Single-Wall Carbon Nanotubes (SWCNTs, OCSiAl) Powder as Conductive Electrode Additive, 5 g/bottle, CCEASWCNTP

Single-Wall Carbon Nanotubes (SWCNTs, OCSiAl) Powder as Conductive Electrode Additive, 5 g/bottle, CCEASWCNTP

$179.00
Single-Wall Carbon Nanotubes (SWCNTs, OCSiAl) Slurry as Conductive Electrode Additive, 100 g/bottle, CCEASWCNTS

Single-Wall Carbon Nanotubes (SWCNTs, OCSiAl) Slurry as Conductive Electrode Additive, 100 g/bottle, CCEASWCNTS

Single-Wall Carbon Nanotubes (SWCNTs, OCSiAl) Slurry as Conductive Electrode Additive, 100 g/bottle, CCEASWCNTS

$49.00
Covalently Functionalized Single-Wall Carbon Nanotubes (SWCNTs, OCSiAl) as Conductive Electrode Additive, 1 g/bottle, CCEACFSWCNT

Covalently Functionalized Single-Wall Carbon Nanotubes (SWCNTs, OCSiAl) as Conductive Electrode Additive, 1 g/bottle, CCEACFSWCNT

Covalently Functionalized Single-Wall Carbon Nanotubes (SWCNTs, OCSiAl) as Conductive Electrode Additive, 1 g/bottle, CCEACFSWCNT

$149.00
Multi-Wall Carbon Nanotubes (MWCNTs, >99%) Powder as Conductive Electrode Additive, 50 g/bottle, CCEAMWCNTP

Multi-Wall Carbon Nanotubes (MWCNTs, >99%) Powder as Conductive Electrode Additive, 50 g/bottle, CCEAMWCNTP

Multi-Wall Carbon Nanotubes (MWCNTs, >99%) Powder as Conductive Electrode Additive, 50 g/bottle, CCEAMWCNTP

$59.00
Multi-Wall Carbon Nanotubes (MWCNTs) Slurry as Conductive Electrode Additive, 100 g/bottle, CCEAMWCNTS

Multi-Wall Carbon Nanotubes (MWCNTs) Slurry as Conductive Electrode Additive, 100 g/bottle, CCEAMWCNTS

Multi-Wall Carbon Nanotubes (MWCNTs) Slurry as Conductive Electrode Additive, 100 g/bottle, CCEAMWCNTS

$49.00
Covalently Functionalized Multi-Wall Carbon Nanotubes (MWCNTs, >99%) as Conductive Electrode Additive, 10 g/bottle, CCEACFMWCNT

Covalently Functionalized Multi-Wall Carbon Nanotubes (MWCNTs, >99%) as Conductive Electrode Additive, 10 g/bottle, CCEACFMWCNT

Covalently Functionalized Multi-Wall Carbon Nanotubes (MWCNTs, >99%) as Conductive Electrode Additive, 10 g/bottle, CCEACFMWCNT

$49.00
Polyaniline (PANI) Powder for Organic Electrode of Supercapacitor and Battery, 10g/bottle, CSBOEPANIP

Polyaniline (PANI) Powder for Organic Electrode of Supercapacitor and Battery, 10g/bottle, CSBOEPANIP

Polyaniline (PANI) Powder for Organic Electrode of Supercapacitor and Battery, 10g/bottle, CSBOEPANIP

$49.00
Self-Standing Single-Wall Carbon Nanotubes (SWCNT) Electrode (100mm * 100mm) for Supercapacitor and Battery, CSBSSESWCNT

Self-Standing Single-Wall Carbon Nanotubes (SWCNT) Electrode (100mm * 100mm) for Supercapacitor and Battery, CSBSSESWCNT

Self-Standing Single-Wall Carbon Nanotubes (SWCNT) Electrode (100mm * 100mm) for Supercapacitor and Battery, CSBSSESWCNT

$199.00
Self-Standing Multi-Wall Carbon Nanotubes (MWCNT) Electrode (100mm * 100mm) for Supercapacitor and Battery, CSBSSEMWCNT

Self-Standing Multi-Wall Carbon Nanotubes (MWCNT) Electrode (100mm * 100mm) for Supercapacitor and Battery, CSBSSEMWCNT

Self-Standing Multi-Wall Carbon Nanotubes (MWCNT) Electrode (100mm * 100mm) for Supercapacitor and Battery, CSBSSEMWCNT

$199.00
Self-Standing Graphene Electrode (L100mm * W100mm * T25um) for Supercapacitor and Battery, CSBSSGE

Self-Standing Graphene Electrode (L100mm * W100mm * T25um) for Supercapacitor and Battery, CSBSSGE

Self-Standing Graphene Electrode (L100mm * W100mm * T25um) for Supercapacitor and Battery, CSBSSGE

$99.00
Polyaniline (PANI) Coated on Carbon Cloth as Organic Electrode (100mm * 100mm) for Supercapacitor and Battery, CSBOEPANICC

Polyaniline (PANI) Coated on Carbon Cloth as Organic Electrode (100mm * 100mm) for Supercapacitor and Battery, CSBOEPANICC

Polyaniline (PANI) Coated on Carbon Cloth as Organic Electrode (100mm * 100mm) for Supercapacitor and Battery, CSBOEPANICC

$129.00
Dry Electrode Coated Activated Carbon on Aluminum Foil (L 100mm * W 100mm) for Supercapacitor, CSDECAC

Dry Electrode Coated Activated Carbon on Aluminum Foil (L 100mm * W 100mm) for Supercapacitor, CSDECAC

Dry Electrode Coated Activated Carbon on Aluminum Foil (L 100mm * W 100mm) for Supercapacitor, CSDECAC

$109.00
Self-Standing Electrode (50mm * 50mm) for Supercapacitor, CSSSE

Self-Standing Electrode (50mm * 50mm) for Supercapacitor, CSSSE

Self-Standing Electrode (50mm * 50mm) for Supercapacitor, CSSSE

$29.00
Activated Carbon (YP-50F) Electrode (20mm * 20mm) with Welded Tab for Supercapacitor, 5 pcs/pack, CSACEWT

Activated Carbon (YP-50F) Electrode (20mm * 20mm) with Welded Tab for Supercapacitor, 5 pcs/pack, CSACEWT

Activated Carbon (YP-50F) Electrode (20mm * 20mm) with Welded Tab for Supercapacitor, 5 pcs/pack, CSACEWT

$39.00
Current Collector with Welded Tab for Pairing with Supercapacitor Electrode, 5 pcs/pack, CSECCWT

Current Collector with Welded Tab for Pairing with Supercapacitor Electrode, 5 pcs/pack, CSECCWT

Current Collector with Welded Tab for Pairing with Supercapacitor Electrode, 5 pcs/pack, CSECCWT

$49.00
Gel Electrolyte (20mm * 20mm) for Flexible Supercapacitor, CFSGE

Gel Electrolyte (20mm * 20mm) for Flexible Supercapacitor, CFSGE

Gel Electrolyte (20mm * 20mm) for Flexible Supercapacitor, CFSGE

$49.00
Flexible Supercapacitor Cell with PAA Gel Electrolyte, CFSCGEPAA

Flexible Supercapacitor Cell with PAA Gel Electrolyte, CFSCGEPAA

Flexible Supercapacitor Cell with PAA Gel Electrolyte, CFSCGEPAA

$49.00
Supercapacitor Testing Kit with Electrode, Gel Electrolyte, and Cell, CSTK

Supercapacitor Testing Kit with Electrode, Gel Electrolyte, and Cell, CSTK

Supercapacitor Testing Kit with Electrode, Gel Electrolyte, and Cell, CSTK

$149.00
NKK Cellulose Roll (TF4030, TF4425, TF4530) as Aqueous Supercapacitor and Battery Separator, CASBSC

NKK Cellulose Roll (TF4030, TF4425, TF4530) as Aqueous Supercapacitor and Battery Separator, CASBSC

NKK Cellulose Roll (TF4030, TF4425, TF4530) as Aqueous Supercapacitor and Battery Separator, CASBSC

$99.00
NKK Hydrophilic Polypropylene (MPF30AC-100) Roll as Aqueous Supercapacitor or Battery Separator, CASBSHPP

NKK Hydrophilic Polypropylene (MPF30AC-100) Roll as Aqueous Supercapacitor or Battery Separator, CASBSHPP

NKK Hydrophilic Polypropylene (MPF30AC-100) Roll as Aqueous Supercapacitor or Battery Separator, CASBSHPP

$129.00
[EMIM][BF4] (1-Ethyl-3-methylimidazolium tetrafluoroborate, 99.5%) Ionic Liquid as Electrolyte Solvent and Additive, 25 g/bottle, CESAILEMIMBF4

[EMIM][BF4] (1-Ethyl-3-methylimidazolium tetrafluoroborate, 99.5%) Ionic Liquid as Electrolyte Solvent and Additive, 25 g/bottle, CESAILEMIMBF4

[EMIM][BF4] (1-Ethyl-3-methylimidazolium tetrafluoroborate, 99.5%) Ionic Liquid as Electrolyte Solvent and Additive, 25 g/bottle, CESAILEMIMBF4

$69.00

Supercapacitor

Filters

Vapor Grown Carbon Fiber (VGCF-H) Powder as Conductive Electrode Additive, 10 g/bottle, CCEAVGCFHP

Graphene Powder as Conductive Electrode Additive, 50 g/bottle, CCEAGP

Graphene Slurry as Conductive Electrode Additive, 100 g/bottle, CCEAGS

Single-Wall Carbon Nanotubes (SWCNTs, OCSiAl) Powder as Conductive Electrode Additive, 5 g/bottle, CCEASWCNTP

Single-Wall Carbon Nanotubes (SWCNTs, OCSiAl) Slurry as Conductive Electrode Additive, 100 g/bottle, CCEASWCNTS

Covalently Functionalized Single-Wall Carbon Nanotubes (SWCNTs, OCSiAl) as Conductive Electrode Additive, 1 g/bottle, CCEACFSWCNT

Multi-Wall Carbon Nanotubes (MWCNTs, >99%) Powder as Conductive Electrode Additive, 50 g/bottle, CCEAMWCNTP

Multi-Wall Carbon Nanotubes (MWCNTs) Slurry as Conductive Electrode Additive, 100 g/bottle, CCEAMWCNTS

Covalently Functionalized Multi-Wall Carbon Nanotubes (MWCNTs, >99%) as Conductive Electrode Additive, 10 g/bottle, CCEACFMWCNT

Polyaniline (PANI) Powder for Organic Electrode of Supercapacitor and Battery, 10g/bottle, CSBOEPANIP

Self-Standing Single-Wall Carbon Nanotubes (SWCNT) Electrode (100mm * 100mm) for Supercapacitor and Battery, CSBSSESWCNT

Self-Standing Multi-Wall Carbon Nanotubes (MWCNT) Electrode (100mm * 100mm) for Supercapacitor and Battery, CSBSSEMWCNT

Self-Standing Graphene Electrode (L100mm * W100mm * T25um) for Supercapacitor and Battery, CSBSSGE

Polyaniline (PANI) Coated on Carbon Cloth as Organic Electrode (100mm * 100mm) for Supercapacitor and Battery, CSBOEPANICC

Dry Electrode Coated Activated Carbon on Aluminum Foil (L 100mm * W 100mm) for Supercapacitor, CSDECAC

Self-Standing Electrode (50mm * 50mm) for Supercapacitor, CSSSE

Activated Carbon (YP-50F) Electrode (20mm * 20mm) with Welded Tab for Supercapacitor, 5 pcs/pack, CSACEWT

Current Collector with Welded Tab for Pairing with Supercapacitor Electrode, 5 pcs/pack, CSECCWT

Gel Electrolyte (20mm * 20mm) for Flexible Supercapacitor, CFSGE

Flexible Supercapacitor Cell with PAA Gel Electrolyte, CFSCGEPAA

Supercapacitor Testing Kit with Electrode, Gel Electrolyte, and Cell, CSTK

NKK Cellulose Roll (TF4030, TF4425, TF4530) as Aqueous Supercapacitor and Battery Separator, CASBSC

NKK Hydrophilic Polypropylene (MPF30AC-100) Roll as Aqueous Supercapacitor or Battery Separator, CASBSHPP

[EMIM][BF4] (1-Ethyl-3-methylimidazolium tetrafluoroborate, 99.5%) Ionic Liquid as Electrolyte Solvent and Additive, 25 g/bottle, CESAILEMIMBF4