In:
Journal of the American Ceramic Society, Wiley, Vol. 104, No. 12 ( 2021-12), p. 6696-6708
Abstract:
Binary transition‐metal oxides with spinel structure have great potential as advanced anode materials for lithium‐ion batteries (LIBs). Herein, NiFe‐NiFe 2 O 4 / reduced graphene oxide (rGO) composites are obtained via a facile cyanometallic framework precursor strategy to improve the lithium storage performance of NiFe 2 O 4 . In the composites, NiFe‐NiFe 2 O 4 nanoparticles with adjustable mass ratios of NiFe 2 O 4 to NiFe alloy are homogeneously deposited on rGO sheets. As anode material for LIBs, the optimized NiFe‐NiFe 2 O 4 /rGO composite displays remarkably enhanced lithium storage performance with an initial specific capacity as high as 1362 mAh g −1 at 0.1 A g −1 and a decent capacity retention of ca . 80% after 130 cycles. Besides, the composite delivers a reversible capacity of 550 mAh g −1 at 1 A g −1 after 300 cycles. During the charge–discharge cycles, the aggregation of the NiFe‐NiFe 2 O 4 nanoparticles and the structural collapse of the electrode can be well alleviated by rGO sheets. Moreover, the conductivity of the electrode can be significantly improved by the well‐conductive NiFe alloy and rGO sheets. All these contribute to the improved lithium storage performance of NiFe‐NiFe 2 O 4 /rGO composites.
Type of Medium:
Online Resource
ISSN:
0002-7820
,
1551-2916
DOI:
10.1111/jace.v104.12
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
2008170-4
detail.hit.zdb_id:
219232-9
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