Enhancement of the Electrochemical Performance of LiNi1/3Co1/3Mn1/3O2 Cathode Material by Double-Layer Coating with Graphene Oxide and SnO2 for Lithium-Ion Batteries. (22nd April 2019)

• Record Type: Journal Article
• Authors: Ma, Yuxin; Cui, Ping; Zhan, Dan; Gan, Bing; Ma, Youliang; Liang, Ying
• Other Names: Paik Ungyu Academic Editor.
• Is Part Of: Journal of nanomaterials. Volume 2019(2019)
• Publication Date: 2019-04-22
• Subjects: Nanostructured materials -- Periodicals; Nanotechnology -- Periodicals; Nanomatériaux; Nanostructured materials; Nanotechnology; Nanostructures; Nanotechnology; Periodicals; Fulltext; Internet Resources; Periodicals; 620.115
• DOI: 10.1155/2019/7586790
• Languages: English
• ISSNs: 1687-4110

Abstract

Abstract : The graphene oxide-coated SnO2 -Li1/3 Co1/3 Mn1/3 O2 (GO-SnO2 -NCM) cathode material was successfully synthesized via a facile wet chemical method. The pristine NCM and GO-SnO2 -NCM were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The results showed that the double-coating layer did not destroy the NCM crystal structure, with multiple nano-SnO2 particles and GO uniformly covering the NCM surface. Electrochemical tests indicated that GO-SnO2 -NCM exhibited excellent cycling performance, with 90.7% capacity retention at 1 C after 100 cycles, which was higher than 74.3% for the pristine NCM at the same cycle. The rate capability showed that the double-coating layer enhanced surface electronic–ionic transport. Electrochemical impedance spectroscopy results confirmed that the GO-SnO2 -coating layer effectively suppressed the increased electrode polarization and charge transfer resistance during cycling.