Facilely synthesized LiFePO4 nanocomposites with excellent electrochemical properties as cathodes for lithium ion batteries
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Abstract
A straightforward carbothermal reduction method was used to synthesize nitrogen-doped carbon-coated LiFePO4 with the carbon and nitrogen sources derived from gelatin. Compared to the bare material, the particles of LiFePO4 composites are smaller, the electrical contact between the grains is improved, and lithium ions diffuse more rapidly in the composites. As a consequence, the structural stability and conductivity are enhanced in LiFePO4 compounds. After 500 cycles, the material delivered 138.2 mA h gā1 at a multiplicity of 1C with 90.2% capacity retention. This result demonstrates that a suitable amount of N-doped carbon layer can enhance the electrochemical performance of LiFePO4. This efficient strategy provides a facile approach to develop excellent performance LiFePO4 materials with promising practical applications.
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