摘要
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。
CoOOH was synthesized by a simple one-step co-precipitation method, and 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 5 093 mAh .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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2016年第12期2082-2087,共6页
Chinese Journal of Inorganic Chemistry
基金
中物院--川大协同创新联合基金(No.XTCX2014001)
四川大学青年教师科研启动基金(No.2015SCU11055)资助项目
