Malik, Romeo, Loveridge, Melanie, Williams, Luke J., Huang, Qianye, West, Geoffrey D., Shearing, Paul R., Bhagat, Rohit and Walton, Richard I. (2019) Porous metal–organic frameworks for enhanced performance silicon anodes in lithium-ion batteries. Chemistry of Materials, 31 (11). pp. 4156-4165. doi:10.1021/acs.chemmater.9b00933 ISSN 0897-4756.

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Abstract

Maintaining the physical integrity of electrode microstructures in Li-ion batteries is critical to significantly extend their cycle life. This is especially important for high-capacity anode materials such as silicon, whose operational volume expansion exerts huge internal stress within the anode, resulting in electrode destruction and capacity fade. In this study, we demonstrate that by incorporating metal–organic frameworks (MOFs) with carboxylate organic linkers into Si-based anodes, a stable and flexible pore network is generated to maximize and maintain Li-ion flux throughout the electrode’s architecture. We show that the zirconium carboxylate MOF UiO-67 is a versatile comaterial to boost performance and mitigate the rate of anode degradation that presently limits the lifetime of Si anodes. The cage-like pores in UiO-67 and flexural properties of the 4,4′-biphenyldicarboxylate organic linker are proposed to create robust “ionophores” in the anode film to enhance longer term durability and performance.

Item Type:	Journal Article
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Science, Engineering and Medicine > Science > Chemistry Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH):	Lithium ion batteries
Journal or Publication Title:	Chemistry of Materials
Publisher:	American Chemical Society
ISSN:	0897-4756
Official Date:	15 May 2019
Dates:	Date Event 15 May 2019 Published 15 May 2019 Accepted
Volume:	31
Number:	11
Page Range:	pp. 4156-4165
DOI:	10.1021/acs.chemmater.9b00933
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Copyright Holders:	© 2019 American Chemical Society
Date of first compliant deposit:	30 May 2019
Date of first compliant Open Access:	15 May 2020
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID UNSPECIFIED University of Warwick http://dx.doi.org/10.13039/501100000741 EP/NO01583/1 [EPSRC] Engineering and Physical Sciences Research Council http://dx.doi.org/10.13039/501100000266 RG94392 Faraday Institute for Science and Religion http://dx.doi.org/10.13039/501100005962

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