Journal
NANO RESEARCH
Volume 14, Issue 4, Pages 1061-1068Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-020-3150-9
Keywords
interspace-confined; MoS2-intercalated graphite; hetero-layers; Li+ storage; potassium ion battery
Categories
Funding
- National Natural Science Foundation of China [21701163, 21671181, 21831006, 22075268]
- Anhui Provincial Natural Science Foundation [1808085QB25]
Ask authors/readers for more resources
A two-dimensional interspace-confined synthetic strategy was developed to produce MoS2-intercalated graphite hetero-layers composite, showing high reversible Li+ and K+ storage capacities. The existence of hetero-layers was found to enhance ion diffusion rates, providing new ideas for function-integrated materials in energy storage and conversion fields.
Herein, a two-dimensional (2D) interspace-confined synthetic strategy is developed for producing MoS2-intercalated graphite (G-MoS2) hetero-layers composite through sulfuring the pre-synthesized stage-1 MoCl5-graphite intercalation compound (MoCl5-GIC). The in situ grown MoS2 nanosheets (3-7 layers) are evenly encapsulated in graphite layers with intimate interface thus forming layer-by-layer MoS2-intercalated graphite composite. In this structure, the unique merits of MoS2 and graphite components are integrated, such as high capacity contribution of MoS2 and the flexibility of graphite layers. Besides, the tight interfacial interaction between hetero-layers optimizes the potential of conductive graphite layers as matrix for MoS2. As a result, the G-MoS2 exhibits a high reversible Li+ storage of 344 mAh.g(-1) even at 10 A.g(-1) and a capacity of 539.9 mAh.g(-1) after 1,500 cycles at 5 A.g(-1). As for potassium ion battery, G-MoS2 delivers a reversible capacity of 377.0 mAh.g(-1) at 0.1 A.g(-1) and 141.2 mAh.g(-1) even at 2 A.g(-1). Detailed experiments and density functional theory calculation demonstrate the existence of hetero-layers enhances the diffusion rates of Li+ and K+. This graphite interspace-confined synthetic methodology would provide new ideas for preparing function-integrated materials in energy storage and conversion, catalysis or other fields.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available