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Issue 19, 2017
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Rational synthesis of Ni3(HCOO)6/CNT ellipsoids with enhanced lithium storage performance: inspired by the time evolution of the growth process of a nickel formate framework

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Abstract

Metal–organic frameworks (MOFs) as novel electrode materials have attracted intensive attention; however, low electronic conductivity hinders their practical application in lithium ion batteries (LIBs). This work reports the synthesis of conductive MOF/CNT composites with enhanced electrochemical reactivity. The growth mechanism of the pristine MOF and the correlations of two components are investigated from the viewpoint of crystal engineering. The time dependent morphology evolution experiment reveals that [Ni3(HCOO)6] undergoes an ‘aggregation-based nucleation-growth’ mechanism. As a result, [Ni3(HCOO)6]/CNT microsized ellipsoidal particles are controllably synthesized by tuning the reaction time and the reagent concentration, where CNTs penetrate the entire particles thoroughly. The obtained [Ni3(HCOO)6]/CNT composites exhibit significantly enhanced electrochemical activity in comparison with the as-synthesized pristine [Ni3(HCOO)6]. This is ascribed to the effective 3D conductive network constructed by CNTs. Our results provide an effective synthetic strategy to construct conductive MOF/CNT composites, which pave the way for developing other conductive MOFs for electrode materials.

Graphical abstract: Rational synthesis of Ni3(HCOO)6/CNT ellipsoids with enhanced lithium storage performance: inspired by the time evolution of the growth process of a nickel formate framework

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Publication details

The article was received on 22 Mar 2017, accepted on 20 Apr 2017 and first published on 20 Apr 2017


Article type: Paper
DOI: 10.1039/C7DT01033H
Citation: Dalton Trans., 2017,46, 6473-6482
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    Rational synthesis of Ni3(HCOO)6/CNT ellipsoids with enhanced lithium storage performance: inspired by the time evolution of the growth process of a nickel formate framework

    L. Gou, P. Liu, D. Liu, C. Wang, H. Lei, Z. Li, X. Fan and D. Li, Dalton Trans., 2017, 46, 6473
    DOI: 10.1039/C7DT01033H

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