Rate capability for Na-doped Li1.167Ni0.18Mn0.548Co0.105O2 cathode material and characterization of Li-ion diffusion using galvanostatic intermittent titration technique

Cited 33 time in webofscience Cited 0 time in scopus
  • Hit : 519
  • Download : 0
Spherical Li1.167-xNaxNi0.18Mn0.548Co0.105O2 (0 <= x <= 0.1) particles were prepared by spray pyrolysis, and subjected to electrochemical characterization for lithium battery applications. It was confirmed that Na doping enhances the charge/discharge rate capability. The structure of prepared samples was characterized by XRD: the c-axis lattice parameter increases with increase in the amount of Na ions (parameterized by x, above). The Na-doped sample with x = 0.05 shows capacities of 208 and 184 mA h g (-1) at high current densities of 1.0 C and 2.0 C, respectively. These values are enhanced, compared to values of 189 and 167 mA h g(-1) for the bare sample. The ratio of the capacity at 1.0 C to that at 0.1 C is enhanced from 77% for the bare sample to 84% for the Na-doped sample with x = 0.05. The Li diffusion coefficients obtained from the galvanostatic intermittent titration technique (GITT) are higher for Na-doped samples than for the bare sample. In particular, the Na-doped sample (x = 0.05), in the potential range around 4 V, has a higher DLi+ value of 3.34 x 10(-9) cm(2) s(-1), compared with 1.35 x 10(-9) cm(2) s(-1) for the bare sample. The Na-doped samples (0 < x < 0.075) show high capacity retention: the Na-doped sample (x = 0.05) shows a capacity retention of 92% compared to 83% for the bare sample.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2015-02
Language
English
Article Type
Article
Keywords

RECHARGEABLE LITHIUM BATTERIES; ELECTROCHEMICAL PROPERTIES; HIGH-CAPACITY; SECONDARY BATTERIES; CYCLING STABILITY; RATE PERFORMANCE; CO ELECTRODES; MG; CR; MN

Citation

JOURNAL OF ALLOYS AND COMPOUNDS, v.623, pp.55 - 61

ISSN
0925-8388
DOI
10.1016/j.jallcom.2014.09.203
URI
http://hdl.handle.net/10203/198526
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 33 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0