Ice-templated Self-assembly of VOPO-rfis1-Graphene Nanocomposites for Vertically Porous 3D Supercapacitor Electrodes

Kwang Hoon Lee; Young Woo Lee; Seung Woo Lee; Jeong Sook Ha; Sang Soo Lee; Jeong Gon Son

doi:10.1038/srep13696

Ice-templated Self-assembly of VOPO-rfis1-Graphene Nanocomposites for Vertically Porous 3D Supercapacitor Electrodes

Kwang Hoon Lee, Young Woo Lee, Seung Woo Lee, Jeong Sook Ha, Sang Soo Lee, Jeong Gon Son

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

69 Citations (Scopus)

Abstract

A simple ice-templated self-assembly process is used to prepare a three-dimensional (3D) and vertically porous nanocomposite of layered vanadium phosphates (VOPO 4) and graphene nanosheets with high surface area and high electrical conductivity. The resulting 3D VOPO 4-graphene nanocomposite has a much higher capacitance of 527.9‰g '1 at a current density of 0.5 A‰g '1, compared with ∼ 247 ‰g '1 of simple 3D VOPO 4, with solid cycling stability. The enhanced pseudocapacitive behavior mainly originates from vertically porous structures from directionally grown ice crystals and simultaneously inducing radial segregation and forming inter-stacked structures of VOPO 4-graphene nanosheets. This VOPO 4-graphene nanocomposite electrode exhibits high surface area, vertically porous structure to the separator, structural stability from interstacked structure and high electrical conductivity, which would provide the short diffusion paths of electrolyte ions and fast transportation of charges within the conductive frameworks. In addition, an asymmetric supercapacitor (ASC) is fabricated by using vertically porous VOPO 4-graphene as the positive electrode and vertically porous 3D graphene as the negative electrode; it exhibits a wide cell voltage of 1.6‰V and a largely enhanced energy density of 108‰Wh‰kg '1.

Original language	English
Article number	13696
Journal	Scientific reports
Volume	5
DOIs	https://doi.org/10.1038/srep13696
Publication status	Published - 2015 Sept 3

Bibliographical note

Funding Information:
We gratefully acknowledge financial support from the Global Frontier Research Program (2011-0032156) funded by the Korean Government (MEST), the R&D Convergence Program of NST (National Research Council of Science & Technology) of Republic of Korea and Korea Institute of Science and Technology (KIST) internal project.

ASJC Scopus subject areas

General

Access to Document

10.1038/srep13696

Cite this

@article{b4ac2cd646c044c4934fd35fd6c59f16,

title = "Ice-templated Self-assembly of VOPO-rfis1-Graphene Nanocomposites for Vertically Porous 3D Supercapacitor Electrodes",

abstract = "A simple ice-templated self-assembly process is used to prepare a three-dimensional (3D) and vertically porous nanocomposite of layered vanadium phosphates (VOPO 4) and graphene nanosheets with high surface area and high electrical conductivity. The resulting 3D VOPO 4-graphene nanocomposite has a much higher capacitance of 527.9‰g '1 at a current density of 0.5 A‰g '1, compared with ∼ 247 ‰g '1 of simple 3D VOPO 4, with solid cycling stability. The enhanced pseudocapacitive behavior mainly originates from vertically porous structures from directionally grown ice crystals and simultaneously inducing radial segregation and forming inter-stacked structures of VOPO 4-graphene nanosheets. This VOPO 4-graphene nanocomposite electrode exhibits high surface area, vertically porous structure to the separator, structural stability from interstacked structure and high electrical conductivity, which would provide the short diffusion paths of electrolyte ions and fast transportation of charges within the conductive frameworks. In addition, an asymmetric supercapacitor (ASC) is fabricated by using vertically porous VOPO 4-graphene as the positive electrode and vertically porous 3D graphene as the negative electrode; it exhibits a wide cell voltage of 1.6‰V and a largely enhanced energy density of 108‰Wh‰kg '1.",

author = "Lee, {Kwang Hoon} and Lee, {Young Woo} and Lee, {Seung Woo} and Ha, {Jeong Sook} and Lee, {Sang Soo} and Son, {Jeong Gon}",

note = "Funding Information: We gratefully acknowledge financial support from the Global Frontier Research Program (2011-0032156) funded by the Korean Government (MEST), the R&D Convergence Program of NST (National Research Council of Science & Technology) of Republic of Korea and Korea Institute of Science and Technology (KIST) internal project.",

year = "2015",

month = sep,

day = "3",

doi = "10.1038/srep13696",

language = "English",

volume = "5",

journal = "Scientific reports",

issn = "2045-2322",

publisher = "Nature Research",

}

TY - JOUR

T1 - Ice-templated Self-assembly of VOPO-rfis1-Graphene Nanocomposites for Vertically Porous 3D Supercapacitor Electrodes

AU - Lee, Kwang Hoon

AU - Lee, Young Woo

AU - Lee, Seung Woo

AU - Ha, Jeong Sook

AU - Lee, Sang Soo

AU - Son, Jeong Gon

N1 - Funding Information: We gratefully acknowledge financial support from the Global Frontier Research Program (2011-0032156) funded by the Korean Government (MEST), the R&D Convergence Program of NST (National Research Council of Science & Technology) of Republic of Korea and Korea Institute of Science and Technology (KIST) internal project.

PY - 2015/9/3

Y1 - 2015/9/3

N2 - A simple ice-templated self-assembly process is used to prepare a three-dimensional (3D) and vertically porous nanocomposite of layered vanadium phosphates (VOPO 4) and graphene nanosheets with high surface area and high electrical conductivity. The resulting 3D VOPO 4-graphene nanocomposite has a much higher capacitance of 527.9‰g '1 at a current density of 0.5 A‰g '1, compared with ∼ 247 ‰g '1 of simple 3D VOPO 4, with solid cycling stability. The enhanced pseudocapacitive behavior mainly originates from vertically porous structures from directionally grown ice crystals and simultaneously inducing radial segregation and forming inter-stacked structures of VOPO 4-graphene nanosheets. This VOPO 4-graphene nanocomposite electrode exhibits high surface area, vertically porous structure to the separator, structural stability from interstacked structure and high electrical conductivity, which would provide the short diffusion paths of electrolyte ions and fast transportation of charges within the conductive frameworks. In addition, an asymmetric supercapacitor (ASC) is fabricated by using vertically porous VOPO 4-graphene as the positive electrode and vertically porous 3D graphene as the negative electrode; it exhibits a wide cell voltage of 1.6‰V and a largely enhanced energy density of 108‰Wh‰kg '1.

AB - A simple ice-templated self-assembly process is used to prepare a three-dimensional (3D) and vertically porous nanocomposite of layered vanadium phosphates (VOPO 4) and graphene nanosheets with high surface area and high electrical conductivity. The resulting 3D VOPO 4-graphene nanocomposite has a much higher capacitance of 527.9‰g '1 at a current density of 0.5 A‰g '1, compared with ∼ 247 ‰g '1 of simple 3D VOPO 4, with solid cycling stability. The enhanced pseudocapacitive behavior mainly originates from vertically porous structures from directionally grown ice crystals and simultaneously inducing radial segregation and forming inter-stacked structures of VOPO 4-graphene nanosheets. This VOPO 4-graphene nanocomposite electrode exhibits high surface area, vertically porous structure to the separator, structural stability from interstacked structure and high electrical conductivity, which would provide the short diffusion paths of electrolyte ions and fast transportation of charges within the conductive frameworks. In addition, an asymmetric supercapacitor (ASC) is fabricated by using vertically porous VOPO 4-graphene as the positive electrode and vertically porous 3D graphene as the negative electrode; it exhibits a wide cell voltage of 1.6‰V and a largely enhanced energy density of 108‰Wh‰kg '1.

UR - http://www.scopus.com/inward/record.url?scp=84940848264&partnerID=8YFLogxK

U2 - 10.1038/srep13696

DO - 10.1038/srep13696

M3 - Article

AN - SCOPUS:84940848264

SN - 2045-2322

VL - 5

JO - Scientific reports

JF - Scientific reports

M1 - 13696

ER -

Ice-templated Self-assembly of VOPO-rfis1-Graphene Nanocomposites for Vertically Porous 3D Supercapacitor Electrodes

Abstract

Bibliographical note

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this