Synthesis and Characterization of LiNi1-3Co1-3Mn1-3O2−xClx as Cathode Materials for Lithium Ion Batteries at 55°CReportar como inadecuado




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Advances in Materials Science and EngineeringVolume 2013 2013, Article ID 375074, 6 pages

Research ArticleSchool of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China

Received 14 May 2013; Revised 27 September 2013; Accepted 2 October 2013

Academic Editor: Dachamir Hotza

Copyright © 2013 Hai-Lang Zhang and Shuixiang Liu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A series of materials based on the LiNi1-3Co1-3Mn1-3 system were prepared by a sol-gel method, and their phase formation processes, crystal structures, and electrochemical performances were studied by thermogravimetric analyses TG-DTG, X-ray diffraction XRD, charge-discharge tests, and cyclic voltammetry CV. The XRD patterns indicate that the LiNi1-3Co1-3Mn1-3 powders with better crystalline structure could be obtained at calcining temperature 850°C for 20 h under air atmosphere and show that the chlorine addition may induce the change of lattice parameters. The charge-discharge tests show that both the specific capacities and capacity retentions of Cl-doped materials increase compared to the undoped material, especially for the capacity retention at the high-voltage region. At 55°C, the LiNi1-3Co1-3Mn1-3O2-0.10Cl0.10 cathode material shows the highest initial discharge capacity of 180.1 mAh·g

and the best capacity retention with the value of 91.9% after 100 cycles in the region of 2.0–4.4 V at 0.1 C, while the initial discharge capacity is 208.2 mAh·g

when the charge cutoff voltage is up to 4.6 V.





Autor: Hai-Lang Zhang and Shuixiang Liu

Fuente: https://www.hindawi.com/



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