On the correlation between mechanical flexibility, nanoscale structure, and charge storage in periodic mesoporous CeO(2) thin films

ACS Nano
Torsten BrezesinskiSarah H Tolbert

Abstract

In this work, we report the synthesis and characterization of highly ordered mesoporous CeO(2) thin films with crystalline walls. While this article focuses on electrochemical studies of CeO(2) with periodic nanoscale porosity, we also examine the mechanical properties of these films and show how pore flexing can be used to facilitate intercalation of lithium ions. Mesoporous samples were prepared by dip-coating using the large diblock copolymer KLE as the organic template. We establish that the films have a mesoporous network with a biaxially distorted cubic pore structure and are highly crystalline at the atomic scale when heated to temperatures above 500 degrees C. Following a previously reported approach, we were able to use the voltammetric sweep rate dependence to determine quantitatively the capacitive contribution to electrochemical charge storage. The net result is that mesoporous CeO(2) films exhibit reasonable levels of pseudocapacitive charge storage and much higher capacities than samples prepared without any polymer template. Part of this increased capacity stems from the fact that these films are able to expand normal to the substrate upon intercalation of lithium ions by flexing of the nanoscale pores. This flex...Continue Reading

References

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Jan 23, 2009·Journal of the American Chemical Society·Torsten BrezesinskiSarah H Tolbert

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Citations

Mar 15, 2013·Accounts of Chemical Research·Iris E RaudaSarah H Tolbert
Jun 26, 2012·Nano Letters·Raffaella BuonsantiDelia J Milliron
Sep 18, 2010·Chemical Communications : Chem Comm·Amanda L TianoStanislaus S Wong
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Sep 17, 2014·Nanoscale·Adrian Carretero-GenevrierClement Sanchez
Jun 2, 2012·Chemical Society Reviews·Yu RenPeter G Bruce
Jan 22, 2013·Chemical Society Reviews·Alain Walcarius
Feb 12, 2013·Chemical Society Reviews·Plinio Innocenzi, Luca Malfatti
Aug 28, 2015·ACS Applied Materials & Interfaces·Xingfeng WangXiulei Ji
Dec 22, 2012·Chemical Society Reviews·Yonghui DengDongyuan Zhao
Aug 26, 2016·ACS Applied Materials & Interfaces·Muhammad Sufyan JavedXiao Gu
Jan 10, 2017·ACS Applied Materials & Interfaces·Nachiket RaravikarMichael Goryll
Apr 4, 2018·Nanoscale·P CopH Kozuka
Apr 15, 2016·Physical Review. E·Chin-Chang KuoMichael Dennin
May 22, 2021·Chemistry : a European Journal·Priyabrata SahooH S S Ramakrishna Matte
Sep 19, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Yuliang YuanJianguo Lu
Nov 16, 2018·ACS Applied Materials & Interfaces·Ankit KumarAshok Shukla
Nov 21, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Pascal CopHiromitsu Kozuka
Jul 1, 2020·Chemical Reviews·Simon FleischmannVeronica Augustyn

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