Improvement of electrochemical and thermal properties of Li[Ni0.8Co0.1Mn0.1]O2 positive electrode materials by multiple metal (Al, Mg) substitution

Al and/or Mg-substituted Li[Ni0.8Co0.1Mn0.1-x-yAlxMgy]O2 were prepared by a co-precipitation method and characterized by X-ray diffraction with Rietveld refinement, thermogravimetric analysis, differential scanning calorimetry (DSC), and electrochemical measurements. The Rietveld refinement results...

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Bibliographic Details
Published in:Electrochimica acta 2009-06, Vol.54 (15), p.3851-3856
Main Authors: WOO, S.-W, MYUNG, S.-T, BANG, H, KIM, D.-W, SUN, Y.-K
Format: Article
Language:English
Subjects:
Applied sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
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Summary:Al and/or Mg-substituted Li[Ni0.8Co0.1Mn0.1-x-yAlxMgy]O2 were prepared by a co-precipitation method and characterized by X-ray diffraction with Rietveld refinement, thermogravimetric analysis, differential scanning calorimetry (DSC), and electrochemical measurements. The Rietveld refinement results show that cation mixing of Al and/or Mg-substituted Li[Ni0.8Co0.1Mn0.1-x-yAlxMgy]O2 was reduced with increased doping amounts of Al and Mg. The Al and/or Mg substitution in Li[Ni0.8Co0.1Mn0.1]O2 also resulted in improved electrochemical cycling behavior, structural stability, and thermal stability compared to pristine Li[Ni0.8Co0.1Mn0.1]O2. The improvements of electrochemical and thermal properties resulted from the stabilized host structure by Al and/or Mg incorporation into Li[Ni0.8Co0.1Mn0.1]O2.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2009.01.048