Lamellarly Stacking Porous N, P Co-Doped Mo2 C/C Nanosheets as High Performance Anode for Lithium-Ion Batteries

Fucong Lyu; Shanshan Zeng; Zhifang Sun; Ning Qin; Lujie Cao; Zhenyu Wang; Zhe Jia; Shaofei Wu; Fei-Xiang Ma; Minchan Li; Wenxi Wang; Yang Yang Li; Jian Lu; Zhouguang Lu

doi:10.1002/smll.201805022

Lamellarly Stacking Porous N, P Co-Doped Mo₂ C/C Nanosheets as High Performance Anode for Lithium-Ion Batteries

Small. 2019 Feb;15(8):e1805022. doi: 10.1002/smll.201805022. Epub 2019 Jan 30.

Authors

Fucong Lyu^{1

2

3

4}, Shanshan Zeng^{3

5}, Zhifang Sun¹, Ning Qin¹, Lujie Cao¹, Zhenyu Wang¹, Zhe Jia², Shaofei Wu¹, Fei-Xiang Ma², Minchan Li¹, Wenxi Wang¹, Yang Yang Li^{3

5}, Jian Lu^{2

4}, Zhouguang Lu¹

Affiliations

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.

PMID: 30698915
DOI: 10.1002/smll.201805022

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.

Keywords: N, P co-doped Mo2C/C nanosheets; lithium-ion batteries; porous structure; stacking nanosheets.

Abstract

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