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

详细信息    查看全文

• 作者：Yueyan Li^a ; Li Wang^b ; Xiangming He^b ; ^{hexm@tsinghua.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Bin Tang^c ; Yunxue Jin^a ; ^{jinyunxue@126.com" class="auth_mail" title="E-mail the corresponding author} ; Jianlong Wang^b
• 关键词：Li&ndash ; O2 battery ; Rechargeable ; Discharge capacity ; Boron-doped Ketjenblack ; Oxygen reduction
• 刊名：Journal of Energy Chemistry
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：25
• 期：1
• 页码：131-135
• 全文大小：1059 K

文摘

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.