磷酸锰锂(LiMnPO₄)是一种极具潜力的高效正极材料,其锂离子的低电子导电性和单一的扩散通道要求该材料在合成过程中具有良好的颗粒尺寸和形状控制。通过改变溶剂热法原料进料顺序合成了不同形貌的LiMnPO₄/C材料,结果表明,LiMnPO₄/C材料的电化学性能与粒度有显著的关系。通过应用Mn-P-Li序列制备的LiMnPO₄/C纳米棒表现出更优异的电化学性能,在0.1 C下放电容量可达155 mAh/g,且在0.5 C下循环100次后仍有96.9%的容量保持率。

Lithium manganese phosphate (LiMnPO₄) is a potential positive electrode material with high efficiency.However,the low electronic conductivity of lithium ions and the single diffusion channel require good particle size and shape control during the synthesis of the material.LiMnPO₄/C materials with different morphologies are synthesized by changing the feed sequence of raw materials in solvothermal method.It is found that the electrochemical performance of the corresponding LiMnPO₄/C materials is significantly related to the particle size.LiMnPO₄/C nanorods prepared by Mn-P-Li sequence show better electrochemical performance,with a discharging capacity of 155 mAh·g^-1 at 0.1 C and a capacity retention rate of 96.9% after 100 cycles at 0.5 C.

何泓江(1998-),男,硕士生,研究方向为锂离子电池,2904918416@qq.com。