Wang Ke, Li Zhi
State Grid Henan Electric Power Company Jiaozuo Power Supply Company, Henan, 454003, China.
Henan Zhongneng Photovoltaic Construction Co., Ltd., Henan, 454003, China.
J Nanosci Nanotechnol. 2020 Dec 1;20(12):7673-7679. doi: 10.1166/jnn.2020.18872.
Nitrogen and phosphorus dual-doped graphene oxide was prepared by directly calcining a mixture of pure graphene oxide, urea (nitrogen source), and 1,2-bis(diphenylphosphino)methane (phosphorous source). The morphology and composition of the obtained dual-doped graphene oxide were confirmed by SEM, TEM, XRD pattern, Raman spectrum, and XPS. The nitrogen and phosphorous dual-doped graphene oxide was tested as an anode material of lithium-ion batteries (LIBs). The cycle and rate performance of the dual-doped graphene oxide were also examined. The dualdoped graphene oxide exhibited a superior initial discharge capacity of 2796 mAh·g and excellent reversible capacity of 1200 mAh·g at a current density of 100 mA·g after 200 charge/discharge cycles, suggesting that the dual-doping of nitrogen and phosphorous is an effective way to enhance lithium-ion storage for graphene oxide.
通过直接煅烧纯氧化石墨烯、尿素（氮源）和1,2 - 双（二苯基膦基）甲烷（磷源）的混合物制备了氮磷双掺杂氧化石墨烯。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射图谱（XRD）、拉曼光谱和X射线光电子能谱（XPS）对所得双掺杂氧化石墨烯的形态和组成进行了确认。将氮磷双掺杂氧化石墨烯作为锂离子电池（LIBs）的负极材料进行了测试。还研究了双掺杂氧化石墨烯的循环性能和倍率性能。双掺杂氧化石墨烯在100 mA·g的电流密度下，经过200次充放电循环后，展现出2796 mAh·g的优异初始放电容量和1200 mAh·g的出色可逆容量，这表明氮磷双掺杂是增强氧化石墨烯锂离子存储能力的有效方法。
