中文摘要：

采用水热法制备富锂相正极材料Li1＋2xMn0.8Fe0.2P1–xBxO4（x≤0.10），通过X射线衍射、激光粒度仪、扫描电子显微镜对所得样品进行表征。将所得正极材料组装成电池，采用恒流充放电、循环伏安和交流阻抗测试其电化学性能。结果表明：B原子进入晶格，取代P原子位置，形成固溶体。当B的取代量x=0.02时，富锂相正极材料Li1.04Mn0.8Fe0.2P0.98B0.02O4的电化学性能最好，0.1C时放电比容量为157.9 mA·h/g、5C时为102.7 mA·h/g，分别优于未经B掺杂的LiMn0.8Fe0.2PO4的149.7和85.3 mA·h/g。

英文摘要：

Lithium–rich Li1＋2xMn0.8Fe0.2P1–xBxO4（x≤0.10） cathode materials were synthesized via substitution with B on P–site by a hydrothermal method. The phase and crystal structures were investigated by X-ray diffraction, laser particle size analysis and scanning electron microscopy. The electrochemical properties, including galvanostatic charge/discharge property, cyclic voltammetry and alternating current impedance, were evaluated through assembled coin–type cells. The results show that B occupies P position into the lattice to form a solid solution. The Li–rich Li1.04Mn0.8Fe0.2P0.98B0.02O4 cathode materials show the optimum electrochemical performances, i.e., a capacity of 157.9 mA·h/g at 0.1C and 102.7 mA·h/g at 5C, respectively, which are better than those without B doping.