首页|Mn-doped LiFePO4@C as a high-performance cathode material for lithium-ion batteries
Mn-doped LiFePO4@C as a high-performance cathode material for lithium-ion batteries
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In this work,LiFe1-xMnxPO4@C(x=0,0.01,0.02,0.03)cathode materials were obtained by a simple co-precipitation method and heat treatment,and the influence of Mn-doped modification on the electro-chemical performance of LiFePO4@C cathode materials was investigated.Results show that by doping an appropriate amount of Mn,the cell volume became larger,and the electronic conductivity increased,which improved the Li+diffusion rate and thus its rate capability and cycle performance of Li-ion bat-teries.Among them,LiFe0.98Mn0.02PO4@C showed superior lithium storage capability;the discharge capacity can reach 150.7 mAh g-1 at 0.1 C.The cell could discharge up to 155.9 mAh g-1 at 1 C under high temperature at 45 ℃,which was higher than LiFePO4@C(142 mAh g-1)under the same test conditions.The discharge capacity of 1 C at room temperature was 139.9 mAh g-1,and the cycle stability was 95.9％after 200 cycles.It showed that it had good rate capability and excellent cycle performance.These results indicate that Mn-doped LFP is a simple and effective strategy for developing high-performance cathode materials.
Mn-dopedLiFePO4Lithium-ion batteryHigh temperature
School of Chemistry and Chemical Engineering,Guizhou University,Guiyang,550025,China
Collaborative Innovation Center of Guizhou Province for Efficient Utilization of Phosphorus and Fluorine Resources,Guizhou University,Guiyang,550025,China
Natural Science Research Project of the Education Department of Guizhou Province
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