Journal
JOURNAL OF POWER SOURCES
Volume 233, Issue -, Pages 121-130Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.01.063
Keywords
Layered materials; Cathode materials; Coprecipitation; Lithium-ion batteries
Funding
- National Research Foundation of Korea (NRF)
- Korea government (MEST) [2009-0092780]
- Human Resources Development of the Korea Institute of Energy Technology Evaluation of Planning (KETEP)
- Korea government of Ministry of Knowledge Economy [20114010203150]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20114010203150] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2009-0092780] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study we report the effects of the Ni content on the electrochemical properties and the structural and thermal stabilities of Li[NixCoyMnz]O-2 (x = 1/3, 0.5, 0.6, 0.7, 0.8 and 0.85) synthesized via a coprecipitation method. The electrochemical and thermal properties of Li[NixCoyMnz]O-2 are strongly dependent on its composition. An increase of the Ni content results in an increase of specific discharge capacity and total residual lithium content but the corresponding capacity retention and safety characteristics gradually decreased. The structural stability is related to the thermal and electrochemical stabilities, as confirmed by X-ray diffraction, thermal gravimetric analysis, and differential scanning calorimetry. Developing an ideal cathode material with both high capacity and safety will be a challenging task that requires precise control of microstructure and physico-chemical properties of the electrode. (C) 2013 Elsevier B.V. All rights reserved.
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