Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 683, Issue -, Pages 88-93Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2012.08.005
Keywords
Lithium-ion batteries; Cathode; LiNi0.8Co0.15Al0.05O2; Graphene; Composite
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Funding
- Korea Institute for Advancement of Technology (KIAT)
- Internal Research Program (Secondary Battery Research) of Korea Institute of Energy Research (KIER)
- Korea government Ministry of Knowledge Economy (MKE)
- National Research Council of Science & Technology (NST), Republic of Korea [KIER-B22422] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A LiNi0.8Co0.15Al0.05O2-graphene composite has been synthesized by a high energy mechanical ball milling (HEMM) process. The structural and morphological features of the synthesized samples are characterized by various techniques. Electrochemical studies on the LiNi0.8Co0.15Al0.05O2-graphene composite are conducted using of the galvanostatic charge-discharge process and electrochemical impedance spectroscopy methods by constructing a lithium-ion cell. The LiNi0.8Co0.15Al0.05O2-graphene composite exhibits a high capacity of >180 mA h/g with good cyclability and high rate capability. The improved electrochemical performance is attributed to increased electrical contact provided by the graphene layer, which reduces the cell polarization. (C) 2012 Elsevier B.V. All rights reserved.
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