Porous Carbon Microsphere (500 um, 950 m2/g) for Supercapacitor and Catalyst Support, 10-50 g/bottle, CSCSPCM

A porous carbon microsphere (PCM) with an average particle diameter of 500 um and a specific surface area of 950 m2/g occupies a unique design space in electrochemical energy storage and catalysis. While high-surface-area carbons are often supplied as ultra-fine nanoparticles or powders that present handling and agglomeration challenges, a micron-scale spherical architecture (500 um) introduces distinct hydrodynamic, packing, and mass-transport advantages.

For supercapacitor applications it shows the following advantages: (1) High Electric Double-Layer Capacitance: The 950 m2/g surface area allows for extensive electrostatic charge storage via reversible ion adsorption/desorption at the electrode/electrolyte interface. In typical organic (e.g., 1 M Et4NBF4 in PC/DMC) or ionic liquid electrolytes, carbons in this surface area bracket achieve specific capacitances of 120–180 F/g. (2) High Tap Density and Volumetric Performance: Fine carbon powders suffer from low tap densities, resulting in poor volumetric capacitance. The micron-scale spherical morphology improves powder flowability and packing efficiency, yielding higher volumetric energy density in coin or pouch cells. (3) Rate Capability: The open interparticle channels between the 500 um spheres facilitate rapid ionic transport during high-current-density charge/discharge cycles (~ 10 A/g), minimizing equivalent series resistance (ESR).

As for catalyst supports, its main features are: (1) Dispersion of Active Sites: The 950 m2/g area provides abundant anchoring sites for metal nanoparticles (e.g., Pt, Pd, RuO2), single-atom catalysts (SACs), or metal-organic framework (MOF) derivatives, preventing particle agglomeration and sintering during high-temperature treatments or catalytic reactions. (2) Flow-Through and Packed-Bed Reactor Suitability: In heterogeneous electrocatalysis (such as electrochemical CO2 reduction, oxygen reduction reaction [ORR], water splitting, or organic electrosynthesis), fine nanoparticle catalysts create extreme pressure drops in flow cells or microfluidic reactors. The 500 um microsphere size allows them to function as free-flowing granules suitable for packed-bed reactors, fluidized beds, or compartmentalized flow-cell electrodes without clogging or inducing high hydraulic resistance. (3) Mechanical Robustness: The spherical form factor distributes mechanical stress evenly, resisting degradation or pulverization under mechanical compression in zero-gap flow cell configurations.

Notes: Please try to store the porous carbon microsphere powder in a dry place. 

References: 

1. R. Qiang, et al. Monodisperse carbon microspheres derived from potato starch for asymmetric supercapacitors, Electrochimica Acat. 2015, 167, 303-310.
2. J. Cheng, et al. Preparation and characterization of monodisperse, micrometer-sized, hierarchically porous carbon spheres as catalyst support, Chem Engineering J., 2014, 242, 285-293.