Journal
RSC ADVANCES
Volume 4, Issue 37, Pages 19172-19176Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra01441c
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Funding
- Fundamental R&D Program for Technology of World Premier Materials - Ministry of Trade, Industry and Energy, Republic of Korea [10037921]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10037921] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Over-lithiated layered oxides (OLOs) are one of the promising positive electrode (PE) materials, however, the poor cycle-life of OLOs has to be resolved in order to make OLO cells available. In this work, several kind of additives are investigated to enhance the interfacial stability and the most efficient additive is 1,3-propanesultone (PS). According to spectroscopic analysis, it is found that the surface film derived from PS is effective in suppressing both metal dissolution and undesired reactions of the electrolyte on the PE, which results in remarkably enhanced cycle performance of the OLO electrode.
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