Abstract
Integrating nanostructured LiFePO4 with carbon substrates is a feasible way to obtain high electrochemical performance for lithium-ion batteries (LIBs). The distribution uniformity of LiFePO4 and contact surface area between LiFePO4 and carbon substrates are crucial for the high electrode performance. In this work, LiFePO4 thin film was synthesized on the flat surface of mechanically exfoliated multilayer graphene (MLG) via chemical deposition of Fe2O3 thin film on MLG and conversion to LiFePO4 by solid phase reaction. To enhance the electrochemical performance, carbon coating and Mn doping were carried out to modify the LiFePO4 thin film. LiFe0.95Mn0.05PO4@C film on MLG (MLG/LiFe0.95Mn0.05PO4@C) exhibits high electrochemical performance. Based on the total mass of the composite, specific discharge capacity of 62.5 mAh g−1 is delivered at a high current density of 10 C. Specific discharge capacity of 126.8 mAh g−1 is maintained after 100 cycles at 0.2 C, exhibiting a capacity retention of 97.5%. This method is suitable for large-scale synthesis of carbon-based LiFePO4 composites at low cost.
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Hui Chen: Conceptualization, Methodology, Writing—review and editing. Dongdong Xu: Test, Experimentalize, Data curation. Junming Xu: Investigation, Original draft, Supervision.
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Chen, H., Xu, D. & Xu, J. LiFe0.95Mn0.05PO4@C film grown on multilayer graphene as a cathode material for lithium-ion batteries. Ionics (2024). https://doi.org/10.1007/s11581-024-05569-3
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DOI: https://doi.org/10.1007/s11581-024-05569-3