期刊
CERAMICS INTERNATIONAL
卷 42, 期 12, 页码 13519-13524出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.05.144
关键词
delta-MnO2; Reduced graphene oxide; Anode materials; Li-ion batteries
资金
- Basic and Frontier Research Program of Chongqing Municipality [cstc2015jcyjA90020, cstc2014jcyjA10063]
- Scientific and Technological Research Program of Chongqing Municipal Education Commission [KJ1501101, KJ1500323, KJ1501116]
- Introduction of Talent Project of Chongqing University of Arts and Sciences [R2013CJ06]
- China Postdoctoral Science Foundation [2015M582499]
- Postdoctoral special Foundation of Chongqing [Xm2015064]
- Chongqing Normal University [14XYY025]
- National Natural Science Foundation of China [51502030, 21403020]
We developed a one-pot in situ synthesis procedure to form nanocomposite of reduced graphene oxide (RGO) sheets anchored with 1D delta-MnO2 nanoscrolls for Li-ion batteries. The as-prepared products were characterized by X-ray diffraction (XRD), Raman spectra, X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM). The electrochemical performance of the delta-MnO2 nanoscrolls/RGO composite was measured by galvanostatic charge/discharge cycling and electrochemical impedance spectroscopy. The results show that the delta-MnO2 nanoscrolls/RGO composite displays superior Li-ion battery performance with large reversible capacity and high rate capability. The first discharge and charge capacities are 1520 and 810 mAh g(-1), respectively. After 50 cycles, the reversible discharge capacity is still maintained at 528 mAh g(-1) at the current density of 100 mAh g(-1). The excellent electrochemical performance is attributed to the unique nanostructure of the delta-MnO2 nanoscrolls/RGO composite, the high capacity of MnO2 and superior electrical conductivity of RGO. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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