NDLI: General synthesis of graphene-supported bicomponent metal monoxides as alternative high-performance Li-ion anodes to binary spinel oxides

Content Provider	Royal Society of Chemistry (RSC)
Author	Li, Jieying Wang, Dong Ding, Chunyan Liu, Jinping Zhou, Weiwei Wen, Guangwu Zhang, Rui Hao, Xiaojing Zhao, Limin
Copyright Year	2017
Abstract	Engineering two transition metals into an integrated spinel oxide anode provides great opportunity towards high-performance lithium-ion batteries (LIBs). Spinels with high-valence transition metal oxides (TMOs) however tend to exhibit low initial coulombic efficiency (ICE) due to the irreversible Li2O generated during the first discharge process. Herein, we report a simple and general strategy to synthesize elaborate graphene framework (GF) supported low-valence bicomponent transition metal monoxide anodes (e.g., ZnO–MnO microcubes, ZnO–CoO polyhedra, NiO–CoO nanowires, and (FeO)0.333(MnO)0.667 microspheres, etc.), which can efficiently address the low ICE issue. As a proof of concept demonstration, we show that the ZnO–MnO/GF is indeed more advantageous as an LIB anode over the spinel ZnMn2O4/GF counterpart as well as many other ZnMn2O4-based anodes. Benefiting from the enhanced reversibility of Li+ uptake/extraction and graphene hybridization, the ZnO–MnO/GF electrode exhibits significantly improved ICEs at various current densities, superior rate capability (286 mA h g−1 even at a high current density of 6 A g−1; ∼2.9 min charging/discharging), and extended cycling life (1123 mA h g−1 after 300 cycles) with respect to ZnMn2O4/GF. Such improvements have also been observed for the ZnO–CoO/GF electrode and other analogues. This versatile electrode design could advance our understanding and control of complex TMO-based anodes to gain high ICE and capacity.
Starting Page	1687
Ending Page	1697
Page Count	11
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	5
Issue Number	4
Journal	Journal of Materials Chemistry A
DOI	10.1039/c6ta07936a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Spinel Anode Lithium-ion battery Transition metal Graphene Electrode Electric current
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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