Open AccessDensely Packed and Highly Ordered Carbon Flower Particles for High Volumetric Performance
Author(s) -
Gong Huaxin,
Chen Shucheng,
Ning Rui,
Chang Ting-Hsiang,
Tok Jeffrey B.-H.,
Bao Zhenan
Publication year - 2021
Publication title -
small science
Language(s) - English
Resource type - Journals
ISSN - 2688-4046
DOI - 10.1002/smsc.202000067
Subject(s) - materials science , supercapacitor , carbon fibers , specific surface area , volume (thermodynamics) , porosity , pellets , dispersity , sphere packing , bulk density , capacitance , particle (ecology) , nanotechnology , particle size , chemical engineering , surface (topology) , composite material , chemistry , polymer chemistry , thermodynamics , geometry , mathematics , oceanography , environmental science , composite number , engineering , biochemistry , soil science , soil water , catalysis , physics , electrode , geology
Carbon materials with high specific surface areas are ideal support materials for many applications. However, high specific surface area and large pore volume usually render them with low bulk density, which is undesirable for applications aiming at high volumetric performance. Low bulk density stems from large interparticle‐free volume caused by inefficient random packing within the materials. Herein, a simple synthesis and assembly method is reported to afford dense carbon pellets with both high specific surface area and high bulk density, obtained from the ordered packing of low polydispersity carbon flower particles. The densely packed carbon flower particles exhibit similar specific surface area to their pressed powder analogs, while exhibiting a 66–84% increase in bulk density (0.815 g cm −3 ), and an ultrahigh volumetric surface area (1081 m 2 cm −3 ). The advantages of our materials are demonstrated by supercapacitors, which achieve a high volumetric capacitance of up to 153 F cm −3 . The results reinforce the importance of controlling particle size and shape for porous materials to reduce their bulk volume. The developed materials possessing high volumetric surface area will be useful for many applications, such as gas storage, supercapacitors, and batteries.