Fig. 1. SEM Images of (a) marcro-sized particles of LiMn2O4 agglomerated with (b) primary particles (10~30 nm) and secondary particles(300~400 nm). (c) N2 adsorption and desorption slopes and (d) pore size distribution of LiMn2O4
Fig. 2. XRD pattern of 2wt% Li2TiF6 coated on the LiMn2O4
Fig. 3. TEM images for (a) LiMn2O4, (b) 1 wt% Li2TiF6/LiMn2O4, (c) 2 wt% Li2TiF6/LiMn2O4, and (d) 10 wt% Li2TiF6/LiMn2O4. (e) EDS images for elements (Mn and Ti for 1 wt% Li2TiF6/LiMn2O4)
Fig. 5. Voltage profiles of raw and 2, 5, 10 wt% Li2TiF6 coated LiMn2O4 from 1st to 200th cycles at 20C (3.0-4.3V).
Fig. 6. Nyquist plots of raw and 2, 5 wt% Li2TiF6 coated LiMn2O4 after 100th cycles at 20 C.
Fig. 4. (a) Cyclic performances of raw and Li2TiF6 coated LiMn2O4 at 20 C from 3.0 V to 4.3 V. (b) Rate performance of raw and Li2TiF6 coated LiMn2O4 at different rate (1, 5, 10, 20, 30, 40 and 50 C).
Table 1. Concentration of elements from ICP analysis for Li2TiF6 coated on the LiMn2O4
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