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A study of lithium insertion into MnO2containing TiS2additive a battery material in aqueous LiOH solution

Authors
Journal
Electrochimica Acta
0013-4686
Publisher
Elsevier
Publication Date
Volume
52
Issue
24
Identifiers
DOI: 10.1016/j.electacta.2007.05.018
Keywords
  • Mno2
  • Cathode
  • Additive
  • Tis2
  • Aqueous
  • Battery
Disciplines
  • Chemistry
  • Physics

Abstract

Abstract The electrochemical behavior and surface characterization of manganese dioxide (MnO 2) containing titanium disulphide (TiS 2) as a cathode in aqueous lithium hydroxide (LiOH) electrolyte battery have been investigated. The electrode reaction of MnO 2 in this electrolyte is shown to be lithium insertion rather than the usual protonation. MnO 2 shows acceptable rechargeability as the battery cathode. The influence of TiS 2 (1, 3 and 5 wt%) additive on the performance of MnO 2 as a cathode has been determined. The products formed on reduction of the cathode material have been characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), secondary ion mass spectrometry (SIMS), fourier transform infrared spectroscopy (IR) and transmission electron microscopy (TEM). It is found that the presence of TiS 2 to ≤3 wt% improves the discharge capacity of MnO 2. However, increasing the additive content above this amount causes a decrease in its discharge capacity.

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