Issue 1, 2020

A new design strategy for redox-active molecular assemblies with crystalline porous structures for lithium-ion batteries

Abstract

A new design strategy for high-performance organic cathode active materials for lithium-ion batteries is presented, which involves the assembly of redox-active organic molecules with a crystalline porous structure using mixed-stacked charge-transfer (CT) complexes. Hexahydroxytriphenylene was used as a donor molecule and 1,4,5,8,9,12-hexaazatriphenylene-2,3,6,7,10,11-hexacarbonitrile as an acceptor molecule to give a new porous CT complex (PCT-1) with a pseudo-hexagonal mixed columnar structure. X-ray diffraction measurements and sorption experiments demonstrated that the intercolumnar spaces in PCT-1 can incorporate various molecules accompanied by lattice expansion. A lithium metal battery containing PCT-1 as a cathode active material exhibited a high capacity of 288 mA h g−1 at 500 mA g−1, and this performance was attributed to a combination of the redox-active units and the porous structure of PCT-1.

Graphical abstract: A new design strategy for redox-active molecular assemblies with crystalline porous structures for lithium-ion batteries

Supplementary files

Article information

Article type
Edge Article
Submitted
21 Aug 2019
Accepted
09 Nov 2019
First published
29 Nov 2019
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2020,11, 37-43

A new design strategy for redox-active molecular assemblies with crystalline porous structures for lithium-ion batteries

K. Nakashima, T. Shimizu, Y. Kamakura, A. Hinokimoto, Y. Kitagawa, H. Yoshikawa and D. Tanaka, Chem. Sci., 2020, 11, 37 DOI: 10.1039/C9SC04175C

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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