Boron-doped Ketjenblack based high performances cathode for rechargeable Li-O2 batteries

• 来源期刊: 能源化学
• 年，卷（期）: 2016,（1）
• 页码范围: 131-135
• 页数: 5页
• 语种: 英文

摘要

Boron-doped Ketjenblack is attempted as cathode catalyst for non-aqueous rechargeable Li-O2 batteries.The boron-doped Ketjenblack delivers an extremely high discharge capacity of 7193 mAh/g at a current density of 0.1 mA/cm2,and the capacity is about 2.3 times as that of the pristine KB.When the batteries are cycled with different restricted capacity,the boron-doped Ketjenblack based cathodes exhibits higher discharge platform and longer cycle life than Ketjenblack based cathodes.Additionally,the boron-doped Ketjenblack also shows a superior electrocatalytic activity for oxygen reduction in 0.1 mol/L KOH aqueous solution.The improvement in catalytic activity results from the defects and activation sites introduced by boron doping.