Activated Porous Carbon Spheres with Customized Mesopores through Assembly of Diblock Copolymers for Electrochemical Capacitor

ACS Applied Materials & Interfaces
Jing TangKatsuhiko Ariga

Abstract

A series of porous carbon spheres with precisely adjustable mesopores (4-16 nm), high specific surface area (SSA, ∼2000 m2 g-1), and submicrometer particle size (∼300 nm) was synthesized through a facile coassembly of diblock polymer micelles with a nontoxic dopamine source and a common postactivation process. The mesopore size can be controlled by the diblock polymer, polystyrene-block-poly(ethylene oxide) (PS-b-PEO) templates, and has an almost linear dependence on the square root of the degree of polymerization of the PS blocks. These advantageous structural properties make the product a promising electrode material for electrochemical capacitors. The electrochemical capacitive performance was studied carefully by using symmetrical cells in a typical organic electrolyte of 1 M tetraethylammonium tetrafluoroborate/acetonitrile (TEA BF4/AN) or in an ionic liquid electrolyte of 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4), displaying a high specific capacitance of 111 and 170 F g-1 at 1 A g-1, respectively. The impacts of pore size distribution on the capacitance performance were thoroughly investigated. It was revealed that large mesopores and a relatively low ratio of micropores are ideal for realizing high SSA-nor...Continue Reading

References

May 4, 2005·Nature Materials·Antonino Salvatore AricòWalter van Schalkwijk
Oct 20, 2007·Science·Haeshin LeePhillip B Messersmith
Feb 9, 2008·Journal of the American Chemical Society·Celine LargeotPatrice Simon
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Feb 6, 2014·Advanced Materials·François BéguinElzbieta Frackowiak
Nov 27, 2014·Angewandte Chemie·Lok Kumar ShresthaKatsuhiko Ariga
Jul 24, 2015·Nature Materials·Jian LiuMietek Jaroniec
Oct 25, 2016·Chemical Society Reviews·Yash BoyjooMietek Jaroniec

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Citations

Feb 23, 2019·Science and Technology of Advanced Materials·Katsuhiko ArigaJonathan P Hill
Apr 3, 2020·Nanomaterials·Rekha Goswami ShresthaKatsuhiko Ariga
May 28, 2020·Materials·Ram Lal ShresthaLok Kumar Shrestha
Jan 18, 2019·ACS Applied Materials & Interfaces·Hun ParkTae Hee Han

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