Reduced graphene oxide anchored with δ-MnO2 nanoscrolls as anode materials for enhanced Li-ion storage. Issue 12 (September 2016)

• Record Type: Journal Article
• Authors: Liu, Hongdong; Hu, Zhongli; Tian, Liangliang; Su, Yongyao; Ruan, Haibo; Zhang, Lei; Hu, Rong
• Is Part Of: Ceramics international. Volume 42:Issue 12(2016)
• Page Start: 13519
• Page End: 13524
• Publication Date: 2016-09
• Subjects: δ-MnO2 -- Reduced graphene oxide -- Anode materials -- Li-ion batteries; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.05.144
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: We developed a one-pot in situ synthesis procedure to form nanocomposite of reduced graphene oxide (RGO) sheets anchored with 1D δ-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 δ-MnO2 nanoscrolls/RGO composite was measured by galvanostatic charge/discharge cycling and electrochemical impedance spectroscopy. The results show that the δ-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 δ-MnO2 nanoscrolls/RGO composite, the high capacity of MnO2 and superior electrical conductivity of RGO.