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      Synthesis and Li-storage Performances of LiNi_(0.5)Mn_(1.5)O_4 Nanorods

      YANG Hao-ran;TANG Sha-sha;LIU Jun;JI Wen-hai;YANG Lin-yu;Light Alloy Research Institute,Central South University;School of Materials Science and Engineering,Central South University;  
      The Li Ni_(0.5)Mn_(1.5)O_4 nanorods were synthesized by sintering the stoichiometric mixture of ultrafine α-MnO_2 nanowires precursor,Li OH · H_2O and Ni(NO_3)_2·6H_2O at 800 ℃ for 12 h in air. The crystal structure,surface morphology and electrochemical performance of the product were investigated by XRD, TEM techniques and electrochemical testing. The results reveal that the ultrafine α-MnO_2 nanowires have an average diameter of 10 nm,which can be aggregated together into a cluster,while the LiNi_(0.5)Mn_(1.5)O_4 nanorod has a diameter about 50 nm,similar to that of α-MnO_2 nanowire clusters. The electrochemical performance test exhibits that LiNi_(0.5)Mn_(1.5)O_4 nanorod has an initial discharge specific energy of 475 Wh/kg and capacity retention of 99% after 500 cycles.
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