Novel mixed hydroxy-carbonate precursor assisted synthetic technique for LiNi{sub 1/3}Mn{sub 1/3}Co{sub 1/3}O{sub 2} cathode materials
Journal Article
·
· Materials Research Bulletin
Highlights: • MHC method used to overcome drawbacks of solid state synthesized materials. • Least cation mixing, phase purity, good reversibility and rate capability achieved. • XRD I {sub 0} {sub 0} {sub 3}/I{sub 1} {sub 0} {sub 4} factor, indicating electrochemical reactivity is maximum at 1.6984. • Li/LiNi{sub 1/3}Mn{sub 1/3}Co{sub 1/3}O{sub 2} cell delivered an initial discharge capacity of 175 mAh g{sup −1}. - Abstract: Novel mixed hydroxy-carbonate (MHC) precursors were used to synthesis technique of LiNi{sub 1/3}Mn{sub 1/3}Co{sub 1/3}O{sub 2} cathode material. The powder X-ray diffraction (XRD) pattern of the synthesized LiNi{sub 1/3}Mn{sub 1/3}Co{sub 1/3}O{sub 2} cathode materials exhibited a hexagonal cell with a = 2.8535 Å and c = 14.2040 Å. Fourier transform infrared spectroscopy (FT-IR) spectrum of MHC and LiNi{sub 1/3}Mn{sub 1/3}Co{sub 1/3}O{sub 2} consistent with vibration modes of functional group. Presence of sub-micrometer particle size (200 nm) and highly crystalline morphology confirmed using scanning electron microscopy (SEM). X-ray photoelectron spectroscopy (XPS) suggested that oxidation state of the transition metals; Ni in +2, Mn in +4 and Co in +3 states, respectively in LiNi{sub 1/3}Mn{sub 1/3}Co{sub 1/3}O{sub 2} cathode materials. Cyclic voltammograms (CV) revealed only one major redox couple at 4 V and suggested the absence of structural transitions from hexagonal to monoclinic structure. The Li vs. LiNi{sub 1/3}Mn{sub 1/3}Co{sub 1/3}O{sub 2} cell delivered an initial discharge capacity of 175 mAh g{sup −1} in the voltage range 2.5–4.6 V @ 0.1 C.
- OSTI ID:
- 22345207
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 50; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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