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Facile Preparation of MoS~2~ Nanocomposites for Efficient Potassium‐Ion Batteries by Grinding‐Promoted Intercalation Exfoliation by Honglei Wang; Jiazheng Niu; Jun Shi; Wenzhen Lv; Hongguang Wang; Peter A. van Aken; Zhonghua Zhang; Runfeng Chen; Wei Huang is a Engineering article available to read on EtoBox.

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## Abstract Efficient exfoliations of bulk molybdenum disulfide (MoS~2~) into few‐layered nanosheets in pure phase are highly attractive because of the promising applications of the resulted 2D materials in diversified optoelectronic devices. Here, a new exfoliation method is presented to prepare semiconductive 2D hexagonal phase (2H phase) MoS~2~–cellulose nanocrystal (CNC) nanocomposites using grinding‐promoted intercalation exfoliation (GPIE). This method with facile grinding of the bulk MoS~2~ and CNC powder followed by conventional liquid‐phase exfoliation in water can not only efficiently exfoliate 2H‐MoS~2~ nanosheets, but also produce the 2H‐MoS~2~/CNC 2D nanocomposites simultaneously. Interestingly, the intercalated CNC sandwiched in MoS~2~ nanosheets increases the interlayer spacing of 2H‐MoS~2~, providing perfect conditions to accommodate the large‐sized ions. Therefore, these nanocomposites are good anode materials of potassium‐ion batteries (KIBs), showing a high reversible capacity of 203 mAh g^−1^ at 200 mA g^−1^ after 300 cycles, a good reversible capacity of 114 mAh g^−1^ at 500 mA g^−1^, and a low decay of 0.02% per cycle over 1500 cycles. With these impressive KI

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Author

Honglei Wang; Jiazheng Niu; Jun Shi; Wenzhen Lv; Hongguang Wang; Peter A. van Aken; Zhonghua Zhang; Runfeng Chen; Wei Huang

Publisher

Wiley

Published

2021

Language

EN

Field

Engineering (Physical Sciences)