Lithium manganese phosphate nanoparticles (LiMnPO₄; LMP) as well as the nickel‐doped (LMNP) and graphenised derivatives (G‐LMNP) were synthesized. Electrochemical characteristics of the materials were examined using cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge‐discharge. Lithium ion capacitors (LIC) fabricated using LMP and composite materials as positive electrodes and activated carbon as the negative electrode, exhibited a specific capacitance of 60 F g⁻¹ at a current load of 0.1 A g⁻¹ for the AC//G‐LMNP LIC. Capacitance retention of 83 % was obtained by the AC//G‐LMNP LIC after 750 cycles, with a high specific power of 19 kW kg⁻¹ at 0.5 A g⁻¹.

中文翻译：

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高性能锂离子电容器的石墨烯官能化橄榄石锂锰磷酸盐衍生物

合成了磷酸锂锰纳米颗粒（LiMnPO ₄ ; LMP）以及镍掺杂（LMNP）和石墨化衍生物（G-LMNP）。使用循环伏安法，电化学阻抗谱和恒电流充放电检查了材料的电化学特性。以LMP和复合材料为正极，活性炭为负极制成的锂离子电容器（LIC）在AC // G-的电流负载为0.1 A g ^-1时表现出60 F g ^-1的比电容。LMNP LIC。750次循环后，AC // G-LMNP LIC的电容保持率为83％，在0.5 A g ^-1时具有19 kW kg ^-1的高比功率。