Kang Inhan, Kang Jungwon
Department of Advanced Materials Science and Engineering, Mokpo National University, 61 Dorim-ri, 1666 Yeongsan-ro, Cheonggye-myeon, Muan-gun, Jeonnam, 58554, South Korea.
J Nanosci Nanotechnol. 2021 Jul 1;21(7):3903-3908. doi: 10.1166/jnn.2021.19227.
Lithium-oxygen (Li-O₂) batteries are considered as a promising high-energy storage system. However, they suffer from overpotential and low energy efficiency. This study showed that CuO growth on carbon using facile synthesis (simple dipping and heating process) reduces overpotential, thus increasing the energy efficiency. We confirmed the structure of CuO on carbon using X-ray diffraction pattern, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, and field-emission transmission electron microscopy. The cathode of CuO on carbon shows an average overpotential reduction of ˜6% charge/discharge during 10 cycles in nonaqueous Li-O₂ batteries. The possible reason for the reduced charge overpotential of the cathode of CuO on carbon is attributed to the formed Li₂O₂ of smaller particle size during discharging compared to pristine carbon.
锂氧（Li-O₂）电池被认为是一种很有前景的高能量存储系统。然而，它们存在过电位和能量效率低的问题。本研究表明，通过简便合成法（简单的浸渍和加热过程）在碳上生长氧化铜可降低过电位，从而提高能量效率。我们使用X射线衍射图谱、X射线光电子能谱、场发射扫描电子显微镜和场发射透射电子显微镜确定了碳上氧化铜的结构。在非水Li-O₂电池中，碳上氧化铜阴极在10个循环中显示出充电/放电平均过电位降低约6%。碳上氧化铜阴极充电过电位降低的可能原因是与原始碳相比，放电过程中形成的Li₂O₂粒径更小。
