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Rational design of metal organic frameworks-derived FeS2 hollow nanocages@reduced graphene oxide for K-ion storage

Abstract

K-ion batteries (KIBs) have become one of the promising alternatives to lithium ion batteries. In this work, we are the first to utilize reduced graphene oxide (RGO) wrapped metal organic frameworks-derived FeS2 hollow nanocages (FeS2@RGO) as an anode for KIBs. Owing to the synergistic effect from FeS2 nanocages and RGO shells, our FeS2@RGO sample exhibited superior electrochemical performance. Such FeS2@RGO electrodes demonstrate a high capacity of 264 mAh g-1 after 50 cycles at 50 mA g-1 and 123 mAh g-1 after 420 cycles even at a large current density of 500 mA g-1. More importantly, we also explain the electrochemical reaction process about FeS2 and believe that these results would open the door for a novel class of long cycling performance anode materials in the KIBs field.

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Publication details

The article was received on 29 Jun 2018, accepted on 09 Aug 2018 and first published on 09 Aug 2018


Article type: Paper
DOI: 10.1039/C8NR05239E
Citation: Nanoscale, 2018, Accepted Manuscript
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    Rational design of metal organic frameworks-derived FeS2 hollow nanocages@reduced graphene oxide for K-ion storage

    J. Xie, Y. Zhu, N. Zhuang, H. Lei, W. Zhu, Y. Fu, M. S. Javed, J. Li and W. Mai, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR05239E

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