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3D Crumpled Ultrathin 1T MoS2 for Inkjet Printing of Mg-Ion Asymmetric Micro-supercapacitors.


ABSTRACT: Metallic molybdenum disulfide (MoS2), e.g., 1T phase, is touted as a highly promising material for energy storage that already displays a great capacitive performance. However, due to its tendency to aggregate and restack, it remains a formidable challenge to assemble a high-performance electrode without scrambling the intrinsic structure. Here, we report an electrohydrodynamic-assisted fabrication of 3D crumpled MoS2 (c-MoS2) and its formation of an additive-free stable ink for scalable inkjet printing. The 3D c-MoS2 powders exhibited a high concentration of metallic 1T phase and an ultrathin structure. The aggregation-resistant properties of the 3D crumpled particles endow the electrodes with open space for electrolyte ion transport. Importantly, we experimentally discovered and theoretically validated that 3D 1T c-MoS2 enables an extended electrochemical stable working potential range and enhanced capacitive performance in a bivalent magnesium-ion aqueous electrolyte. With reduced graphene oxide (rGO) as the positive electrode material, we inkjet-printed 96 rigid asymmetric micro-supercapacitors (AMSCs) on a 4-in. Si/SiO2 wafer and 100 flexible AMSCs on photo paper. These AMSCs exhibited a wide stable working voltage of 1.75 V and excellent capacitance retention of 96% over 20?000 cycles for a single device. Our work highlights the promise of 3D layered materials as well-dispersed functional materials for large-scale printed flexible energy storage devices.

SUBMITTER: Shao Y 

PROVIDER: S-EPMC7467814 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature

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3D Crumpled Ultrathin 1T MoS<sub>2</sub> for Inkjet Printing of Mg-Ion Asymmetric Micro-supercapacitors.

Shao Yuanlong Y   Fu Jui-Han JH   Cao Zhen Z   Song Kepeng K   Sun Ruofan R   Wan Yi Y   Shamim Atif A   Cavallo Luigi L   Han Yu Y   Kaner Richard B RB   Tung Vincent C VC  

ACS nano 20200608 6


Metallic molybdenum disulfide (MoS<sub>2</sub>), <i>e</i>.<i>g</i>., 1T phase, is touted as a highly promising material for energy storage that already displays a great capacitive performance. However, due to its tendency to aggregate and restack, it remains a formidable challenge to assemble a high-performance electrode without scrambling the intrinsic structure. Here, we report an electrohydrodynamic-assisted fabrication of 3D crumpled MoS<sub>2</sub> (c-MoS<sub>2</sub>) and its formation of a  ...[more]

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