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利用工艺简单,成本低廉的共沉淀法制得Co OOH,并用作非水性锂-氧气电池阴极催化剂。通过恒流充放电、线性伏安扫描(LSV)和电化学阻抗(EIS)测试研究了电极的电化学性能。结果表明:由于Co OOH能够明显提高氧气还原反应(ORR)的催化活性,与未使用Co OOH的电极相比较,使用Co OOH为催化剂的电极首次放电容量高达5 093 m Ah·g~(-1),提高了1.7倍。电池的充电过电压降低了约460 m V,充电可逆性得到增强,充放电可逆性提高,使得循环性能得到显著改善。
Co OOH is prepared by a coprecipitation method with simple process and low cost, and is used as cathode catalyst for non-aqueous lithium-oxygen battery. Electrochemical performance of the electrode was investigated by galvanostatic charge-discharge, linear voltammetric (LSV) and electrochemical impedance (EIS) measurements. The results show that Co OOH can significantly improve the catalytic activity of oxygen reduction reaction (ORR), compared with the electrode without Co OOH, the electrode with Co OOH as catalyst has an initial discharge capacity of 5 093 m Ah · g -1 ), An increase of 1.7 times. Battery charging over-voltage reduction of about 460 mV, charge reversibility was enhanced, charge-discharge reversibility increased, making the cycle performance has been significantly improved.