Qiao Yun, Han Ruimin, Liu Yang, Ma Mengyue, Cheng Xiaoguang, Li Qingling, Yue Hongyun, Cao Zhaoxia, Zhang Huishuang, Yang Shuting
School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China.
National and Local Joint Engineering Laboratory of Motive Power and Key Materials, Henan Normal University, Xinxiang, Henan, 453007, China.
Chemistry. 2017 Nov 13;23(63):16051-16058. doi: 10.1002/chem.201703375. Epub 2017 Oct 19.
Carbonaceous materials are one of the most promising anode materials for sodium-ion batteries, because of their abundance, stability, and safe usage. However, the practical application of carbon materials is hindered by poor specific capacity and low initial Coulombic efficiency. The design of porous structure and doping with heteroatoms are two simple and effective methods to promote the sodium storage performance. Herein, the N, P co-doped porous carbon materials are fabricated using renewable and biodegradable gelatin as carbon and nitrogen resource, phosphoric acid as phosphorus precursor and polystyrene nanospheres as a template. The product can deliver a reversible capacity of 230 mA h g at a current density of 0.2 A g , and even a high capacity of 113 mA h g at 10 Ag . The enhanced sodium storage performance is attributed to the synergistic effect of the porosity and the dual-doping of nitrogen and phosphorus.
碳质材料因其储量丰富、稳定性好且使用安全，是钠离子电池最具潜力的负极材料之一。然而，碳材料的实际应用受到比容量低和初始库仑效率低的阻碍。设计多孔结构和用杂原子掺杂是提高储钠性能的两种简单有效的方法。在此，以可再生且可生物降解的明胶作为碳源和氮源、磷酸作为磷前驱体、聚苯乙烯纳米球作为模板，制备了氮、磷共掺杂的多孔碳材料。该产物在电流密度为0.2 A g 时可提供230 mA h g 的可逆容量，在10 A g 时甚至具有113 mA h g 的高容量。储钠性能的增强归因于孔隙率以及氮和磷的双掺杂的协同效应。
