NDLI: An alumina stabilized ZnO–graphene anode for lithium ion batteries via atomic layer deposition

Content Provider	Royal Society of Chemistry (RSC)
Author	Yu, Mingpeng Li, Chun Wang, Aiji Shi, Gaoquan Wang, Yinshu
Copyright Year	2014
Abstract	Atomic layer deposition (ALD) was applied to deposit ZnO on graphene aerogel, and this composite was used as an anode material for lithium ion batteries. This electrode material was further modified by an ultrathin Al2O3 layer via ALD to stabilize its electrochemical stability. These two metal oxides were uniformly immobilized on graphene frameworks, and the Al2O3 coating strongly improved the electrochemical performances of ZnO–graphene aerogel composite anodes. Particularly, the composite with 10 ALD cycles of Al2O3 coating (denoted as ZnO–G-10) exhibited a high initial discharge capacity of 1513 mA h g−1 and maintained a reversible capacity of 490 mA h g−1 after 100 cycles at a current density of 100 mA g−1. Furthermore, the capacity retention rate increased from 70% to 90% in comparison with its uncoated counterpart after 100 cycles. The ZnO–G-10 anode also showed good rate-capability, delivering a discharge capacity of 415 mA h g−1 at 1000 mA g−1. The improved electrochemical performance is attributed to the formation of an artificial solid electrolyte interphase layer, stabilizing ZnO and the electrolyte by preventing the aggregation of Zn/ZnO nanograins and the side reaction that would cause the degradation of anodes.
Starting Page	11419
Ending Page	11424
Page Count	6
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	6
Issue Number	19
Journal	Nanoscale
DOI	10.1039/c4nr02576h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Electrode Atomic layer deposition Anode Electrolyte Graphene Aerogel Interphase Electrochemistry Ion Electric current
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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