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Bagheri A, Bellani S, Beydaghi H, Eredia M, Najafi L, Bianca G, Zappia MI, Safarpour M, Najafi M, Mantero E, Sofer Z, Hou G, Pellegrini V, Feng X, Bonaccorso F. Functionalized Metallic 2D Transition Metal Dichalcogenide-Based Solid-State Electrolyte for Flexible All-Solid-State Supercapacitors. ACS NANO 2022; 16:16426-16442. [PMID: 36194759 PMCID: PMC9620411 DOI: 10.1021/acsnano.2c05640] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
Highly efficient and durable flexible solid-state supercapacitors (FSSSCs) are emerging as low-cost devices for portable and wearable electronics due to the elimination of leakage of toxic/corrosive liquid electrolytes and their capability to withstand elevated mechanical stresses. Nevertheless, the spread of FSSSCs requires the development of durable and highly conductive solid-state electrolytes, whose electrochemical characteristics must be competitive with those of traditional liquid electrolytes. Here, we propose an innovative composite solid-state electrolyte prepared by incorporating metallic two-dimensional group-5 transition metal dichalcogenides, namely, liquid-phase exfoliated functionalized niobium disulfide (f-NbS2) nanoflakes, into a sulfonated poly(ether ether ketone) (SPEEK) polymeric matrix. The terminal sulfonate groups in f-NbS2 nanoflakes interact with the sulfonic acid groups of SPEEK by forming a robust hydrogen bonding network. Consequently, the composite solid-state electrolyte is mechanically/dimensionally stable even at a degree of sulfonation of SPEEK as high as 70.2%. At this degree of sulfonation, the mechanical strength is 38.3 MPa, and thanks to an efficient proton transport through the Grotthuss mechanism, the proton conductivity is as high as 94.4 mS cm-1 at room temperature. To elucidate the importance of the interaction between the electrode materials (including active materials and binders) and the solid-state electrolyte, solid-state supercapacitors were produced using SPEEK and poly(vinylidene fluoride) as proton conducting and nonconducting binders, respectively. The use of our solid-state electrolyte in combination with proton-conducting SPEEK binder and carbonaceous electrode materials (mixture of activated carbon, single/few-layer graphene, and carbon black) results in a solid-state supercapacitor with a specific capacitance of 116 F g-1 at 0.02 A g-1, optimal rate capability (76 F g-1 at 10 A g-1), and electrochemical stability during galvanostatic charge/discharge cycling and folding/bending stresses.
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Affiliation(s)
- Ahmad Bagheri
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
- Center
for Advancing Electronics Dresden (CFAED) & Faculty of Chemistry
and Food Chemistry, Technische Universität
Dresden, 01062 Dresden, Germany
| | | | | | - Matilde Eredia
- BeDimensional
SpA, Lungotorrente Secca
30R, 16163 Genoa, Italy
| | - Leyla Najafi
- BeDimensional
SpA, Lungotorrente Secca
30R, 16163 Genoa, Italy
| | - Gabriele Bianca
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, via Dodecaneso 31, 16146 Genoa, Italy
| | | | - Milad Safarpour
- Smart
Materials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Informatica Bioingegneria, Robotica e Ingegneria dei Sistemi (DIBRIS), Universita Degli Studi di Genova, Via All’Opera Pia 13, 16145 Genova, Italy
| | - Maedeh Najafi
- Smart
Materials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Informatica Bioingegneria, Robotica e Ingegneria dei Sistemi (DIBRIS), Universita Degli Studi di Genova, Via All’Opera Pia 13, 16145 Genova, Italy
| | - Elisa Mantero
- BeDimensional
SpA, Lungotorrente Secca
30R, 16163 Genoa, Italy
| | - Zdenek Sofer
- Department
of Inorganic Chemistry, University of Chemistry
and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
| | - Guorong Hou
- Department
of Inorganic Chemistry, University of Chemistry
and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
| | - Vittorio Pellegrini
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
- BeDimensional
SpA, Lungotorrente Secca
30R, 16163 Genoa, Italy
| | - Xinliang Feng
- Center
for Advancing Electronics Dresden (CFAED) & Faculty of Chemistry
and Food Chemistry, Technische Universität
Dresden, 01062 Dresden, Germany
- Max
Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany
| | - Francesco Bonaccorso
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy
- BeDimensional
SpA, Lungotorrente Secca
30R, 16163 Genoa, Italy
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