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首页> 外文期刊>Journal of nano research >Electrochemical Studies on Novel LiMnPO4 Coated with Magnesium Oxide-Gold Composite Thin Film in Aqueous Electrolytes
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Electrochemical Studies on Novel LiMnPO4 Coated with Magnesium Oxide-Gold Composite Thin Film in Aqueous Electrolytes

机译：电解质膜上氧化镁-金复合薄膜包覆新型LiMnPO4的电化学研究

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摘要

Pristine LiMnPO4 and LiMnPO4/MgO-Au composite cathode materials were synthesized and their electrochemical properties interrogated using voltammetry, electrochemical impendence spectroscopy and microscopic techniques. The LiMnPO4/MgO-Au composite cathode exhibited better reversibility and kinetics than the pristine LiMnPO4. This was demonstrated in the values of the diffusion coefficient (D) obtained from electrochemical impendence spectroscopy and the charge and discharge capacities determined through cyclic voltammetry. For the LiMnPO4/MgO-Au, D = 1.4 x 10(-13) cm(2)/s while the pristine has a D value of 2.2 x 10(-17) cm(2)/s. The charge and discharge capacities of LiMnPO4/MgO-Au at 10 mV/s were 259.9 mAh/g and 157.6 mAh/g, respectively. A similar trend was observed in the results obtained from electrochemical impedance spectroscopy measurements. These results indicate that LiMnPO4/MgO-Au composite has better conductivity and will facilitate faster electron transfer and better electrochemical performance than pristine LiMnPO4.
机译：合成了原始的LiMnPO4和LiMnPO4 / MgO-Au复合正极材料，并利用伏安法，电化学阻抗谱和显微技术对它们的电化学性能进行了研究。 LiMnPO4 / MgO-Au复合阴极比原始的LiMnPO4具有更好的可逆性和动力学。这由电化学阻抗光谱法得到的扩散系数（D）值和通过循环伏安法测定的充放电容量证明。对于LiMnPO4 / MgO-Au，D = 1.4 x 10（-13）cm（2）/ s，而原始的D值为2.2 x 10（-17）cm（2）/ s。 LiMnPO4 / MgO-Au在10 mV / s下的充电和放电容量分别为259.9 mAh / g和157.6 mAh / g。从电化学阻抗谱测量获得的结果中观察到类似的趋势。这些结果表明，与原始的LiMnPO4相比，LiMnPO4 / MgO-Au复合材料具有更好的导电性，并且将促进更快的电子转移和更好的电化学性能。

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