Co–Fe layered double hydroxide nanowall array grown from an alloy substrate and its calcined product as a composite anode for lithium-ion batteries

Abstract

Co-Fe layered double hydroxide (LDH) nanowall arrays (NWAs) have been grown directly from a flexible alloy substrate by a facile hydrothermal method. An ultrasonication test of 30 min towards the as-made Co-Fe LDH NWAs has demonstrated their ultra-robust mechanical adhesion to the substrate. In particular, an in situ carbon-source coating (ISCC) on the Co-Fe LDH NWAs was achieved during their in situ growing process conducted in a glucose-containing reaction solution. After annealing treatment in an argon atmosphere, carbon coated Co-Fe mixed oxide NWAs were evolved from thermal decomposition of LDH precursors and carbonization of glucose, and further investigated as anode materials for lithium-ion batteries (LIBs). When tested, the obtained carbon coated Co-Fe mixed oxide NWAs with improved electrical conductivity exhibited superior electrochemical performance in terms of specific capacity and cyclability as compared to a carbon-free sample and a sample made by the previous carbon-coating method. Our work presents an alternative way to fabricate in situ mixed transition metal oxide nanostructures for high-performance LIBs.

Layered double hydroxides toward electrochemical energy storage and conversion: design, synthesis and applications

“…Liu et al 31 first reported a facile synthesis of CoFe-LDH nanowall arrays (NWAs) robustly built on a flexible Fe-Co-Ni substrate through a hydrothermal method. In situ growth of LDHs usually results in an oriented and rigid nanoplatelet array architecture, which allows an easy access of electrolytes to the entire nanosheets and thereby improves the overall performance of LDHbased electrodes.…”

Room-Temperature Synthesis FeNiCo Layered Double Hydroxide as an Excellent Electrochemical Water Oxidation Catalyst

“…[1][2][3][4][5][6][7][8][9] Up to now, a wide variety of LDH and its derivative materials have been synthesized and applied in supercapacitors, [10][11][12] electrochemical catalysis, [13][14][15][16] Li-ion batteries. [17][18][19] However, developing mild but efficient synthesis approaches of LDHs without deteriorate their catalytic performance are still great challenges.…”

Simple fabrication of strongly coupled cobalt ferrite/carbon nanotube composite based on deoxygenation for improving lithium storage

“…Furthermore, when an Fe 2+ -containing LDH precursor was employed to generate neat MFe 2 O 4 spinel ferrite, the transformation of Fe 2+ to Fe 3+ may occur causing the reduction of the oxygen-containing groups on the oxidized CNTs surface. As a result, it could be anticipated that LDH precursor with decomposition behavior would exhibit stronger chemical interactions with the oxidized CNTs during the calcining process [30,31], even produce an 'oxygen bridge' linkage [32]. However, to our best knowledge, the deoxygenation of oxidized CNTs originated from the reducting effect of Fe 2+ cations had not been reported so far.…”