Future renewable energy integrated grid systems require rechargeable batteries with low cost, high safety and long cycle life. The much higher abundance and fair distribution of potassium compared to lithium in Earth crust indicates that rechargeable potassium batteries can represent an attractive replacement for lithium-ion counterparts. Rechargeable potassium batteries have gained tremendous attention during the past decade. However, the development of rechargeable potassium batteries is still in its infancy. Due to the large atomic radius of potassium, some electrode materials that are commonly used in Li‐ion systems are not suitable for potassium batteries. Thus, new anode materials for these energy storage systems have been developed. The most performing are mainly based on carbon materials, metal alloys, metal dichalcogenides and potassium metal. On the other hand, cathode materials can be divided into three categories: Prussian blue and its analogues, layered metal oxides and polyanion oxides. Among transition metal dichalcogenides, layered MoS2 offers a suitable 2D diffusion pathway for K+ ions, since the layered are stacked together by van der Waals interactions and the interlayer distance can be modulated. Herein, we reported a preliminary study on MoS2 as anode material in potassium batteries. When deposited on copper as current collector, it ensured, at 0.1 A/g, an initial charge and discharge specific capacity of 102.7 and 106.7 mAh/g, respectively and Coulombic efficiency of 96.3%. After 100 cycle, it exhibited 94% capacity retention, with a Coulombic efficiency approaching 100%.

A preliminary investigation on MoS2 as an anode for potassium batteries / Fagiolari, L.; Di Berardino, F.; Versaci, D.; Amici, J.; Francia, C.; Bodoardo, S.; Bella, F.. - ELETTRONICO. - (2021), pp. IND OR036-IND OR036. ((Intervento presentato al convegno XXVII Congresso Nazionale della Società Chimica Italiana tenutosi a Virtual meeting nel 14-23 settembre 2021.

A preliminary investigation on MoS2 as an anode for potassium batteries

L. Fagiolari;F. Di Berardino;D. Versaci;J. Amici;C. Francia;S. Bodoardo;F. Bella
2021

Abstract

Future renewable energy integrated grid systems require rechargeable batteries with low cost, high safety and long cycle life. The much higher abundance and fair distribution of potassium compared to lithium in Earth crust indicates that rechargeable potassium batteries can represent an attractive replacement for lithium-ion counterparts. Rechargeable potassium batteries have gained tremendous attention during the past decade. However, the development of rechargeable potassium batteries is still in its infancy. Due to the large atomic radius of potassium, some electrode materials that are commonly used in Li‐ion systems are not suitable for potassium batteries. Thus, new anode materials for these energy storage systems have been developed. The most performing are mainly based on carbon materials, metal alloys, metal dichalcogenides and potassium metal. On the other hand, cathode materials can be divided into three categories: Prussian blue and its analogues, layered metal oxides and polyanion oxides. Among transition metal dichalcogenides, layered MoS2 offers a suitable 2D diffusion pathway for K+ ions, since the layered are stacked together by van der Waals interactions and the interlayer distance can be modulated. Herein, we reported a preliminary study on MoS2 as anode material in potassium batteries. When deposited on copper as current collector, it ensured, at 0.1 A/g, an initial charge and discharge specific capacity of 102.7 and 106.7 mAh/g, respectively and Coulombic efficiency of 96.3%. After 100 cycle, it exhibited 94% capacity retention, with a Coulombic efficiency approaching 100%.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2951997