Relation Between Crystal Structure and Electrochemical Performance of LiNi1/3Zn x Co1/3−x Mn1/3O2 (0.000 ≤ x ≤ 0.133)
LiNi1/3Zn x Co1/3−x Mn1/3O2 (0.000 ≤ x ≤ 0.133) hollow microspheres are synthesized using MnO2 hollow microspheres both as a self-template and Mn source. These hollow microspheres, ~4 μm in diameter, are composed of approximately 300 nm basic nanoparticles. The XRD patterns of LiNi1/3Zn x Co1/3−x Mn1/3O2 were analyzed by the RIETAN-FP program, and the obtained samples have a layered α-NaFeO2 structure. Electrochemical performances of the samples were carried out between 2.5 V and 4.5 V. The behavior of the lattice parameters is consistent with Cycling performance and rate performance change with increase of x. Compared with the others, the sample of x = 0.133 exhibits a relatively superior electrochemical performance. The specific capacity of x = 0.133 was increased by 10.7% than no-doped. In addition, the cyclic voltammograms curves of the second cycle show no significant alteration compared with the first cycle and the electrochemical impedance of zinc doping sample showed smaller transfer resistance than the no-doping sample.
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Document Type: Research Article
Affiliations: College of Physics, Qingdao University, Qingdao 266071, China
Publication date: April 1, 2018
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