Abstract
Inspired by the successful commercialization of LiFePO4, LiMnPO4 with a similar olivine structure has gained extensive research attention due to its higher electrode potential. Among various modification methods, nanoscaling and exposure of active crystal facets have been proven effective in improving the intrinsic issues of LiMnPO4. In this study, LiMnPO4/C nanocrystals were synthesized using ethylene glycol as a solvent, and the reaction temperature and time of the solvent thermal process were varied. It was found that the sample synthesized at a reaction temperature of 200 °C and a reaction time of 9 h exhibited discharge capacities of 145.1 mAh/g and 63.9 mAh/g at 0.1C and 5C, respectively. Furthermore, after 100 cycles, the sample maintained a capacity retention rate of 92.1 %. This significant improvement in electrochemical performance was attributed to the synergistic effect of nanoscaling and crystal facet engineering, effectively addressing the low electronic conductivity and sluggish diffusion rate issues of LiMnPO4 for lithium ions.
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