A polymer-direct-intercalation strategy for MoS2/carbon-derived heteroaerogels with ultrahigh pseudocapacitance

Nan Feng, Ruijin Meng, Lianhai Zu, Yutong Feng, Chengxin Peng, Jimei Huang, Guanglei Liu, Bingjie Chen and Jinhu Yang ()
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Nan Feng: Tongji University
Ruijin Meng: Tongji University
Lianhai Zu: Tongji University
Yutong Feng: Tongji University
Chengxin Peng: University of Shanghai for Science and Technology
Jimei Huang: Tongji University
Guanglei Liu: Tongji University
Bingjie Chen: Tongji University
Jinhu Yang: Tongji University

Nature Communications, 2019, vol. 10, issue 1, 1-11

Abstract: Abstract The intercalation strategy has become crucial for 2D layered materials to achieve desirable properties, however, the intercalated guests are often limited to metal ions or small molecules. Here, we develop a simple, mild and efficient polymer-direct-intercalation strategy that different polymers (polyethyleneimine and polyethylene glycol) can directly intercalate into the MoS2 interlayers, forming MoS2-polymer composites and interlayer-expanded MoS2/carbon heteroaerogels after carbonization. The polymer-direct-intercalation behavior has been investigated by substantial characterizations and molecular dynamic calculations. The resulting composite heteroaerogels possess 3D conductive MoS2/C frameworks, expanded MoS2 interlayers (0.98 nm), high MoS2 contents (up to 74%) and high Mo valence (+6), beneficial to fast and stable charge transport and enhanced pseudocapacitive energy storage. Consequently, the typical MoS2/N-doped carbon heteroaerogels exhibit outstanding supercapacitor performance, such as ultrahigh capacitance, remarkable rate capability and excellent cycling stability. This study offers a new intercalation strategy which may be generally applicable to 2D materials for promising energy applications.

Date: 2019
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DOI: 10.1038/s41467-019-09384-7

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