Lyu Fucong, Zeng Shanshan, Sun Zhifang, Qin Ning, Cao Lujie, Wang Zhenyu, Jia Zhe, Wu Shaofei, Ma Fei-Xiang, Li Minchan, Wang Wenxi, Li Yang Yang, Lu Jian, Lu Zhouguang
Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China.
Department of Mechanical Engineering, Hong Kong Branch of National Precious Metals Material Engineering Research Centre, City University of Hong Kong, Kowloon, Hong Kong, China.
Small. 2019 Feb;15(8):e1805022. doi: 10.1002/smll.201805022. Epub 2019 Jan 30.
Layered stacking and highly porous N, P co-doped Mo C/C nanosheets are prepared from a stable Mo-enhanced hydrogel. The hydrogel is formed through the ultrafast cross-linking of phosphomolybdic acid and chitosan. During the reduction of the composite hydrogel framework under inert gas protection, highly porous N and P co-doped carbon nanosheets are produced with the in situ formation of ultrafine Mo C nanoparticles highly distributed throughout the nanosheets which are entangled via a hierarchical lamellar infrastructure. This unique architecture of the N, P co-doped Mo C/C nanosheets tremendously promote the electrochemical activity and operate stability with high specific capacity and extremely stable cycling. In particular, this versatile synthetic strategy can also be extended to other polyoxometalate (such as phosphotungstic acid) to provide greater opportunities for the controlled fabrication of novel hierarchical nanostructures for next-generation high performance energy storage applications.
层状堆叠且具有高度多孔性的氮、磷共掺杂碳化钼/碳纳米片由一种稳定的钼增强水凝胶制备而成。该水凝胶通过磷钼酸和壳聚糖的超快交联形成。在惰性气体保护下对复合水凝胶骨架进行还原过程中，会生成高度多孔的氮、磷共掺杂碳纳米片，同时原位形成高度分布于整个纳米片中的超细碳化钼纳米颗粒，这些纳米片通过分级层状结构相互缠结。氮、磷共掺杂碳化钼/碳纳米片的这种独特结构极大地促进了电化学活性，并以高比容量和极其稳定的循环性能实现了操作稳定性。特别是，这种通用的合成策略还可以扩展到其他多金属氧酸盐（如磷钨酸），为下一代高性能储能应用中新型分级纳米结构的可控制造提供更多机会。
