Nanostructured Ni/Ti3C2Tx MXene hybrid as cathode for lithium-oxygen battery

Publication date: Available online 18 September 2019Source: Chinese Chemical LettersAuthor(s): Caiying Wen, Tianjiao Zhu, Xingyu Li, Huifeng Li, Xianqiang Huang, Genban SunAbstractTi3C2 belongs to MXenes family, which is a new two-dimensional material and has been applied in many fields. With simple method of hydrothermal and high temperature calcination, nanostructured Ni/Ti3C2Tx hybrid was synthesized. The stable layer structure of Ti3C2 MXene providing high surface area as well as excellent electronic conductivity are beneficial for deposition and decomposition of discharge product Li2O2. Furthermore, possessing special catalytic activity, Ni nanoparticles with size of about 20 nm could accelerate Li2O2 breaking down. Taking advantage of two kinds of materials, Ni/Ti3C2Tx hybrid as cathode of Li-O2 battery can achieve a maximal specific capacity of 20264 mA h/g in 100 mA/g and 10699 mA h/g in 500 mA/g at the first cycle. This work confirms that the prepared Ni/Ti3C2Tx hybrid exhibiting better cycling stability points out a new guideline to improve the electrochemical performance of lithium-oxygen batteries.Graphical abstractNi/Ti3C2Tx MXene hybrid is used as cathode material of lithium-oxygen battery, which shows good cycle and specific capacity performance.
Source: Chinese Chemical Letters - Category: Chemistry Source Type: research