NDLI: Constructing the optimal conductive network in MnO-based nanohybrids as high-rate and long-life anode materials for lithium-ion batteries

Content Provider	Royal Society of Chemistry (RSC)
Author	Xie, Hai-Ming Wang, Rong-Shun Lü, Hong-Yan Wan, Fang Wu, Xing-Long Hou, Bao-Hua Liu, Dai-Huo Bao, Sheng-Da Yan, Qingyu
Copyright Year	2015
Abstract	Among the transition metal oxides as anode materials for lithium ion batteries (LIBs), the MnO material should be the most promising one due to its many merits mainly relatively low voltage hysteresis. However, it still suffers from inferior rate capabilities and poor cycle life arising from kinetic limitations, drastic volume changes and severe agglomeration of active MnO particulates during cycling. In this paper, by integrating the typical strategies of improving the electrochemical properties of transition metal oxides, we had rationally designed and successfully prepared one superior MnO-based nanohybrid (MnO@C/RGO), in which carbon-coated MnO nanoparticles (MnO@C NPs) were electrically connected by three-dimensional conductive networks composed of flexible graphene nanosheets. Electrochemical tests demonstrated that, the MnO@C/RGO nanohybrid not only showed the best Li storage performance in comparison with the commercial MnO material, MnO@C NPs and carbon nanotube enhanced MnO@C NPs, but also exhibited much improved electrochemical properties compared with most of the previously reported MnO-based materials. The superior electrochemical properties of the MnO@C/RGO nanohybrid included a high specific capacity (up to 847 mA h g−1 at 80 mA g−1), excellent high-rate capabilities (for example, delivering 451 mA h g−1 at a very high current density of 7.6 A g−1) and long cycle life (800 cycles without capacity decay). More importantly, for the first time, we had achieved the discharging/charging of MnO-based materials without capacity increase even after 500 cycles by adjusting the voltage range, making the MnO@C/RGO nanohybrid more possible to be a really practical anode material for LIBs.
Starting Page	19738
Ending Page	19746
Page Count	9
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	3
Issue Number	39
Journal	Journal of Materials Chemistry A
DOI	10.1039/c5ta03556b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Li Transition metal Anode Ion Hysteresis Electrochemistry Graphene Carbon nanotube Electric current
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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