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Lithium-ion battery performance of layered 0.3Li2MnO3–0.7LiNi0.5Mn0.5O2composite cathode prepared by co-precipitation and sol–gel methods

Authors
Journal
Materials Letters
0167-577X
Publisher
Elsevier
Volume
104
Identifiers
DOI: 10.1016/j.matlet.2013.04.001
Keywords
  • Composite Materials
  • Diffusion
  • Raman
  • Energy Storage And Conversion
  • Sol–Gel Preparation

Abstract

Abstract High energy density composite cathode, 0.3Li2MnO3–0.7LiNi0.5Mn0.5O2 was prepared using two different wet chemical routes viz. co-precipitation and sol–gel methods. The powder X-ray diffraction patterns and Raman spectra of the samples showed clear evidence of the composite nature. Microscopy analysis revealed the particle sizes of the materials prepared by co-precipitation and sol–gel methods are 1.5–2.0µm and 350–550nm, respectively. Charge–discharge tests indicate the better electrochemical performance of the sol–gel prepared composite in terms of high discharge capacity (∼240mAh/g) and good cycling performance. The improved electrochemical performance was attributed to a decrease in the charge-transfer resistance and high surface area.

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