Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/106600
Title: A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries
Authors: Zhang, Wenyu
Zeng, Yi
Xu, Chen
Xiao, Ni
Gao, Yiben
Li, Lain-Jong
Chen, Xiaodong
Hng, Huey Hoon
Yan, Qingyu
Issue Date: 2012
Source: Zhang, W., Zeng, Y., Xu, C., Xiao, N., Gao, Y., Li, L. J., Chen, X., Hng, H. H.,& Yan, Q. (2012). A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries. Beilstein Journal of Nanotechnology, 3, 513-523
Series/Report no.: Beilstein journal of nanotechnology
Abstract: We report a facile method to prepare a nanoarchitectured lithium manganate/graphene (LMO/G) hybrid as a positive electrode for Li-ion batteries. The Mn2O3/graphene hybrid is synthesized by exfoliation of graphene sheets and deposition of Mn2O3 in a one-step electrochemical process, which is followed by lithiation in a molten salt reaction. There are several advantages of using the LMO/G as cathodes in Li-ion batteries: (1) the LMO/G electrode shows high specific capacities at high gravimetric current densities with excellent cycling stability, e.g., 84 mAh·g−1 during the 500th cycle at a discharge current density of 5625 mA·g−1 (~38.01 C capacity rating) in the voltage window of 3–4.5 V; (2) the LMO/G hybrid can buffer the Jahn–Teller effect, which depicts excellent Li storage properties at high current densities within a wider voltage window of 2–4.5 V, e.g., 93 mAh·g−1 during the 300th cycle at a discharge current density of 5625 mA·g−1 (~38.01 C). The wider operation voltage window can lead to increased theoretical capacity, e.g., 148 mAh·g−1 between 3 and 4.5 V and 296 mAh·g−1 between 2 and 4.5 V; (3) more importantly, it is found that the attachment of LMO onto graphene can help to reduce the dissolution of Mn2+ into the electrolyte, as indicated by the inductively coupled plasma (ICP) measurements, and which is mainly attributed to the large specific surface area of the graphene sheets.
URI: https://hdl.handle.net/10356/106600
http://hdl.handle.net/10220/12674
ISSN: 2190-4286
DOI: 10.3762/bjnano.3.59
Rights: © 2012 The Authors. This paper was published in Beilstein journal of nanotechnology and is made available as an electronic reprint (preprint) with permission of Beilstein-Institut. The paper can be found at the following official DOI: [http://dx.doi.org/10.3762/bjnano.3.59]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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