oa South African Journal of Chemistry - Performance and structure of LiNi0.5Mn1.5O4 prepared from various Ni precursors for lithium ion batteries : research article
|Article Title||Performance and structure of LiNi0.5Mn1.5O4 prepared from various Ni precursors for lithium ion batteries : research article|
|© Publisher:||South African Chemical Institute (SACI)|
|Journal||South African Journal of Chemistry|
|Author||Zhaoyong Chen, Shan Ji, Huali Zhu, Sivakumar Pasupathi, Ben Bladergroen and Vladimir Linkov|
|Publication Date||Jan 2008|
|Pages||157 - 161|
|Keyword(s)||Cathode materials, LiNi0.5Mn1.5O4, Lithium ion battery and Spinel|
LiNi0.5Mn1.5O4 compounds were prepared through a solid-state reaction using various Ni precursors. The effect of the precursors on the electrochemical performance of LiNi0.5Mn1.5O4 was investigated. LiNi0.5Mn1.5O4 made from Ni(NO3)26H2O shows the best charge-discharge performance. The reversible capacity of LiNi0.5Mn1.5O4 is about 145 mA h g-1 and remained at 143 mA h g-1 after 10 cycles at 3.0 to 5.0 V. The XRD results showed that the precursors and dispersion method had significant effects on their structures. Pure spinel phase can be obtained with a high energy ball-milling method and Ni(NO3)26H2O as precursor. A trace amount of the NiO phase was detected in LiNi0.5Mn1.5O4 with the manual grinding method when Ni(CH3COO)26H2O, NiO and Ni2O3 were used as precursors.
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