| CoOOH用作高性能锂-氧气电池的一种新型催化剂的研究 |
| CoOOH as a novel catalyst for high performance Li-O2 batteries |
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| 摘要: 利用工艺简单,成本低廉的共沉淀法制得CoOOH,并首次用作锂-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CoOOH能够明显提高氧气还原反应(ORR)的催化活性,与未使用CoOOH的电极相比较,使用CoOOH为催化剂的电极首次放电容量高达5093 mA h g–1, 提高了1.7倍。电池的充电过电压降低了约460 mV,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。CoOOH是高性能锂-氧气电池应用中一种潜在的好的催化剂。 |
| 关键词: 锂-氧气电池 CoOOH 催化剂 高性能 |
| 基金项目: |
| Abstract: CoOOH was synthesized by a simple one-step co-precipitation method, and firstly used as cathode catalyst in non-aqueous Li-O2 batteries. The introduction of CoOOH could catalyze the oxygen reduction reaction (ORR) upon discharge, making the CoOOH-contained cathode display a high discharge capacity of 5093 mA h g–1, which was about 1.7 times higher than that of the CoOOH-free cathode. Furthermore, the CoOOH-contained cathode exhibited a significantly reduced recharge overpotential (460 mV), enhancing recharge-ability. Thus, the reversibility was improved, and the cycling performance was ameliorated. These results indicate that CoOOH is potentially good catalyst for high-performance Li-O2 batteries. |
| Keywords: Li-O2 battery CoOOH catalyst high performance |
| 投稿时间：2016-07-26 修订日期：2016-10-07 |
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