Development of Li(Ni1/3Mn1/3Co1/3-x Na x )O2 cathode materials by synthesizing with glycine nitrate combustion technique for Li-ion rechargeable batteries
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Glycine nitrate combustion technique was investigated for synthesizing Li(Ni1/3Mn1/3Co1/3-x Na x )O2, x = 0–0.11 based transition metal oxide cathode materials for the rechargeable Li-ion battery (LIB) under this study. X-ray diffraction and scanning electron microscopy analysis showed that the synthesized powder samples were well crystalline rather spherical secondary particles. These secondary particles were composed of softly agglomerated nano-scale primary particles. The room temperature electrical conductivity of these Na-doped materials was significantly higher than that of the base material (2.60 × 10−7 S/cm). Among them, the x = 0.04 material reported the highest electrical conductivity of 1.02 × 10−03 S cm−1. The half-cell assembled with cathode fabricated from Li(Ni1/3Mn1/3Co1/3)O2 base material showed an initial discharge capacity of 187 mA h−1 g−1 with 25 mA h−1 g−1 irreversible capacity loss and 88.47% columbic efficiency at C/5 rate with a cut-off voltage of 2.5–4.6 V at 25 °C. The electrochemical behavior of the x = 0.04 cathode showed a comparable initial discharge capacity as of the base material but with improved capacity retention.
KeywordsLithium ion rechargeable battery Cathode material Transition metal oxide Glycine nitrate combustion method Cell performance
Financial assistance by the Human Resources Development (HRD) program of the Higher Education for Twenty First Century (HETC) project of Ministry of Higher Education, Sri Lanka is acknowledged.
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