Highly Crystalline Mesoporous Phosphotungstic Acid: A High-Performance Electrode Material for Energy-Storage Applications

Hamid Ilbeygi; In Young Kim; Min Gyu Kim; Wangsoo Cha; Paskalis Sahaya Murphin Kumar; Dae Hwan Park; Ajayan Vinu

doi:10.1002/anie.201901224

Highly Crystalline Mesoporous Phosphotungstic Acid: A High-Performance Electrode Material for Energy-Storage Applications

Hamid Ilbeygi, In Young Kim, Min Gyu Kim, Wangsoo Cha, Paskalis Sahaya Murphin Kumar, Dae Hwan Park, Ajayan Vinu

Department of Chemistry & Nanoscience

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

54 Scopus citations

Abstract

Heteropoly acids (HPAs) are unique materials with interesting properties, including high acidity and proton conductivity. However, their low specific surface area and high solubility in polar solvents make them unattractive for catalytic or energy applications. This obstacle can be overcome by creating nanoporosity within the HPA. We synthesized mesoporous phosphotungstic acid (mPTA) with a spherical morphology through the self-assembly of phosphotungstic acid (PTA) with a polymeric surfactant as stabilized by KCl and hydrothermal treatment. The mPTA nanostructures had a surface area of 93 m² g⁻¹ and a pore size of 4 nm. Their high thermal stability (ca. 450 °C) and lack of solubility in ethylene carbonate/diethyl carbonate (EC/DEC) electrolyte are beneficial for lithium-ion batteries (LIBs). Optimized mPTA showed a reversible capacity of 872 mAh g⁻¹ at 0.1 A g⁻¹ even after 100 cycles for LIBs, as attributed to a super-reduced state of HPA and the storage of Li ions within the mesochannels of mPTA.

Original language	English
Pages (from-to)	10849-10854
Number of pages	6
Journal	Angewandte Chemie - International Edition
Volume	58
Issue number	32
DOIs	https://doi.org/10.1002/anie.201901224
State	Published - 5 Aug 2019

Bibliographical note

Funding Information:
H.I. acknowledges the University of South Australia and the University of Queensland for an IPRS scholarship. I.Y.K. acknowledges the research support provided by the Australian Research Council (ARC) through a Discovery Early Career Researcher Award (grant number DE170101069). NEXAFS experiments were financially supported by The Australian Synchrotron. A.V. acknowledges the support of the University of Newcastle and the Australian Research Council (DP1501048248 and DP170104478).

Publisher Copyright:
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

crystalline structures
electrochemistry
mesoporous materials
phosphotungstic acid
soft templating

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1002/anie.201901224

Cite this

@article{52ee93e0c35342c598915f0f92a67485,

title = "Highly Crystalline Mesoporous Phosphotungstic Acid: A High-Performance Electrode Material for Energy-Storage Applications",

abstract = "Heteropoly acids (HPAs) are unique materials with interesting properties, including high acidity and proton conductivity. However, their low specific surface area and high solubility in polar solvents make them unattractive for catalytic or energy applications. This obstacle can be overcome by creating nanoporosity within the HPA. We synthesized mesoporous phosphotungstic acid (mPTA) with a spherical morphology through the self-assembly of phosphotungstic acid (PTA) with a polymeric surfactant as stabilized by KCl and hydrothermal treatment. The mPTA nanostructures had a surface area of 93 m2 g−1 and a pore size of 4 nm. Their high thermal stability (ca. 450 °C) and lack of solubility in ethylene carbonate/diethyl carbonate (EC/DEC) electrolyte are beneficial for lithium-ion batteries (LIBs). Optimized mPTA showed a reversible capacity of 872 mAh g−1 at 0.1 A g−1 even after 100 cycles for LIBs, as attributed to a super-reduced state of HPA and the storage of Li ions within the mesochannels of mPTA.",

keywords = "crystalline structures, electrochemistry, mesoporous materials, phosphotungstic acid, soft templating",

author = "Hamid Ilbeygi and Kim, {In Young} and Kim, {Min Gyu} and Wangsoo Cha and Kumar, {Paskalis Sahaya Murphin} and Park, {Dae Hwan} and Ajayan Vinu",

note = "Funding Information: H.I. acknowledges the University of South Australia and the University of Queensland for an IPRS scholarship. I.Y.K. acknowledges the research support provided by the Australian Research Council (ARC) through a Discovery Early Career Researcher Award (grant number DE170101069). NEXAFS experiments were financially supported by The Australian Synchrotron. A.V. acknowledges the support of the University of Newcastle and the Australian Research Council (DP1501048248 and DP170104478). Publisher Copyright: {\textcopyright} 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2019",

month = aug,

day = "5",

doi = "10.1002/anie.201901224",

language = "English",

volume = "58",

pages = "10849--10854",

journal = "Angewandte Chemie - International Edition",

issn = "1433-7851",

publisher = "John Wiley and Sons Ltd",

number = "32",

}

TY - JOUR

T1 - Highly Crystalline Mesoporous Phosphotungstic Acid

T2 - A High-Performance Electrode Material for Energy-Storage Applications

AU - Ilbeygi, Hamid

AU - Kim, In Young

AU - Kim, Min Gyu

AU - Cha, Wangsoo

AU - Kumar, Paskalis Sahaya Murphin

AU - Park, Dae Hwan

AU - Vinu, Ajayan

N1 - Funding Information: H.I. acknowledges the University of South Australia and the University of Queensland for an IPRS scholarship. I.Y.K. acknowledges the research support provided by the Australian Research Council (ARC) through a Discovery Early Career Researcher Award (grant number DE170101069). NEXAFS experiments were financially supported by The Australian Synchrotron. A.V. acknowledges the support of the University of Newcastle and the Australian Research Council (DP1501048248 and DP170104478). Publisher Copyright: © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

PY - 2019/8/5

Y1 - 2019/8/5

N2 - Heteropoly acids (HPAs) are unique materials with interesting properties, including high acidity and proton conductivity. However, their low specific surface area and high solubility in polar solvents make them unattractive for catalytic or energy applications. This obstacle can be overcome by creating nanoporosity within the HPA. We synthesized mesoporous phosphotungstic acid (mPTA) with a spherical morphology through the self-assembly of phosphotungstic acid (PTA) with a polymeric surfactant as stabilized by KCl and hydrothermal treatment. The mPTA nanostructures had a surface area of 93 m2 g−1 and a pore size of 4 nm. Their high thermal stability (ca. 450 °C) and lack of solubility in ethylene carbonate/diethyl carbonate (EC/DEC) electrolyte are beneficial for lithium-ion batteries (LIBs). Optimized mPTA showed a reversible capacity of 872 mAh g−1 at 0.1 A g−1 even after 100 cycles for LIBs, as attributed to a super-reduced state of HPA and the storage of Li ions within the mesochannels of mPTA.

AB - Heteropoly acids (HPAs) are unique materials with interesting properties, including high acidity and proton conductivity. However, their low specific surface area and high solubility in polar solvents make them unattractive for catalytic or energy applications. This obstacle can be overcome by creating nanoporosity within the HPA. We synthesized mesoporous phosphotungstic acid (mPTA) with a spherical morphology through the self-assembly of phosphotungstic acid (PTA) with a polymeric surfactant as stabilized by KCl and hydrothermal treatment. The mPTA nanostructures had a surface area of 93 m2 g−1 and a pore size of 4 nm. Their high thermal stability (ca. 450 °C) and lack of solubility in ethylene carbonate/diethyl carbonate (EC/DEC) electrolyte are beneficial for lithium-ion batteries (LIBs). Optimized mPTA showed a reversible capacity of 872 mAh g−1 at 0.1 A g−1 even after 100 cycles for LIBs, as attributed to a super-reduced state of HPA and the storage of Li ions within the mesochannels of mPTA.

KW - crystalline structures

KW - electrochemistry

KW - mesoporous materials

KW - phosphotungstic acid

KW - soft templating

UR - http://www.scopus.com/inward/record.url?scp=85067187855&partnerID=8YFLogxK

U2 - 10.1002/anie.201901224

DO - 10.1002/anie.201901224

M3 - Article

C2 - 31062897

AN - SCOPUS:85067187855

SN - 1433-7851

VL - 58

SP - 10849

EP - 10854

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 32

ER -

Highly Crystalline Mesoporous Phosphotungstic Acid: A High-Performance Electrode Material for Energy-Storage Applications

Abstract

Bibliographical note

Keywords

UN SDGs

Access to Document

Fingerprint

Cite this