Please use this identifier to cite or link to this item:
|Title:||Graphene-based surface modification on layered Li-rich cathode for high-performance Li-ion batteries|
|Citation:||Song, B., Lai, M.O., Liu, Z., Liu, H., Lu, L. (2013-09-14). Graphene-based surface modification on layered Li-rich cathode for high-performance Li-ion batteries. Journal of Materials Chemistry A 1 (34) : 9954-9965. ScholarBank@NUS Repository. https://doi.org/10.1039/c3ta11580a|
|Abstract:||A Li-rich cathode material Li(Li0.2Mn0.54Ni 0.13Co0.13)O2 synthesized by a sol-gel method is further modified by wrapping with graphene oxide (GO) using a simple chemical approach and post thermal annealing. X-ray diffraction (XRD), Raman spectroscopy, high resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) characterizations show that annealing of the GO-wrapped material leads to a transformation from the original layered structure to a spinel phase on the surfaces of the powder particles. The electrochemical performance, and in particular the rate capability, is observed to be significantly enhanced as a result of this unique surface-treated Li-rich cathode/graphene composite structure. The modified sample reveals a very high discharge capacity of 313 mA h g-1 at a current density of 12.5 mA g-1, and 201 mA h g-1 charge capacity at an extremely high current density of 2500 mA g-1. Such improvement is ascribed to the co-existence of reduced GO, the locally transformed spinel-like structure and the recrystallized particles on the surfaces of the primary particles. © 2013 The Royal Society of Chemistry.|
|Source Title:||Journal of Materials Chemistry A|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Nov 17, 2018
WEB OF SCIENCETM
checked on Oct 31, 2018
checked on Sep 28, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.