Macroporous Hierarchical-Porous-Carbon (HPC-15) for Supercapacitor, Battery, and Catalyst Support, 5 g/bottle, CSBCSMHPC15
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In electrochemical systems, macroporous carbon (pore diameters > 50 nm) acts as the "high-speed highway" of the electrode. While micropores provide the high surface area needed for charge storage, macropores are critical for mass transport, especially in high-power applications where ions must move rapidly through the material.
In standard supercapacitors, "ion crowding" in micropores limits how fast you can charge the device. Macroporous networks solve this: (1) Ion Reservoirs: Macropores act as "buffer tanks" for electrolyte ions, ensuring a constant supply to the smaller pores during rapid discharge. (2) Low ESR: They reduce the Equivalent Series Resistance (ESR), allowing for massive power bursts (e.g., for regenerative braking in EVs or power grid stabilization). (3) Performance: Hierarchical macroporous carbons can reach capacitances of 240–40 F/g even at high current densities (> 20 A/g).
Macroporous carbon "cages" are used to host sulfur cathodes: (1) Volume Expansion: Sulfur expands by ~80% during lithiation. The large internal volume of macropores provides the necessary space to accommodate this expansion without breaking the electrode. (2) Polysulfide Trapping: When combined with N-doping, the macroporous walls can chemically trap polysulfides, reducing the "shuttle effect" that plagues Li-S batteries.
For water electrolysis application, macroprous carbon are used as 3D support structures for catalysts like FeCoNi or IrRuOx. (1) Gas Management: Large pores (> 100 um) are essential for bubble detachment. If pores are too small, H2 or O2 bubbles get trapped, "blinding" the catalyst and increasing resistance. (2) Massive Loading: The 3D macroporous framework allows for high mass loading of catalysts without clogging the electrode, enabling industrial-scale current densities (> 1000 mA/cm2).
| Part Number |
CSBCSMHPC15 (C-SBCS-MHPC15) |
| Specific Capacitance |
240-400 F/g (aqueous system)
|
| Surface Area |
500-600 m2/g
|
| Pore Volume |
0.45-0.6 cm3/g |
| Pore Size |
~100 nm (macropore>95%, a small portion is mesopore) |
| Package Size | 5 g/bottle |
Notes: Please try to store the macroporous carbon (HPC-15) powder in a dry place.
References:
- H. Sun, et al. Template-Free Synthesis of Renewable Macroporous Carbon via Yeast Cells for High-Performance Supercapacitor Electrode Materials, ACS Appl. Mater. Interfaces 2013, 5, 6, 2261–2268.
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Q. Chen, et al. Effects of macropore size on structural and electrochemical properties of hierarchical porous carbons, 2012, 47, 6444–6450.