Fucong Lyu1,2,3,4, Shanshan Zeng3,5, Zhifang Sun1, Ning Qin1, Lujie Cao1, Zhenyu Wang1, Zhe Jia2, Shaofei Wu1, Fei-Xiang Ma2, Minchan Li1, Wenxi Wang1, Yang Yang Li3,5, Jian Lu2,4, Zhouguang Lu1. 1. Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China. 2. Department of Mechanical Engineering, Hong Kong Branch of National Precious Metals Material Engineering Research Centre, City University of Hong Kong, Kowloon, Hong Kong, China. 3. Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Kowloon, Hong Kong, China. 4. Centre for Advanced Structural Materials, City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China. 5. Department of Material Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, China.
Abstract
Layered stacking and highly porous N, P co-doped Mo2 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 Mo2 C nanoparticles highly distributed throughout the nanosheets which are entangled via a hierarchical lamellar infrastructure. This unique architecture of the N, P co-doped Mo2 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.
Layered stacking and highly porous N, P co-doped n class="Chemical">Mo2 C/C nanpan>osheets are prepared from a stable Mo-enhanpan>ced hydrogel. The hydrogel is formed through the ultrafast cross-linking of pan> class="Chemical">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 Mo2 C nanoparticles highly distributed throughout the nanosheets which are entangled via a hierarchical lamellar infrastructure. This unique architecture of the N, P co-doped Mo2 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.