Citation:
Zhi-Mei Luo, Yan-Guang Sun, Hui-Yong Liu. Electrochemical performance of a nano SnO2-modified LiNi1/3Co1/3Mn1/3O2 cathode material[J]. Chinese Chemical Letters,
;2015, 26(11): 1403-1408.
doi:
10.1016/j.cclet.2015.06.007
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The nano SnO2-modified LiNi1/3Co1/3Mn1/3O2 was successfully prepared by a carrier transfer method. The pristine and modified samples were characterized with various techniques such as XRD, SEM, XPS and EDS. The results showed that the SnO2 particles did not enter the crystal structure of LiNi1/3Co1/ 3Mn1/3O2, many nano SnO2 particles were uniformly covered on the surface of LiNi1/3Co1/3Mn1/3O2 and the modified thin layer could inhibit the dissolution of transition metal oxides. The electrochemical tests indicated that the existence of nano SnO2 could improve the discharge capacity and rate capability owing to the decreased interfacial polarization. The cycling stability was remarkably improved at room temperature and 55 ℃. The XRD patterns of the fresh NCM electrode and after 50 cycles proved that the structural change of NCM was not so effective on the capacity fade.
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Keywords:
- Carrier transfer method
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