期刊
ADVANCED FUNCTIONAL MATERIALS
卷 29, 期 30, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201806584
关键词
energy-storage electrodes; flexible electrodes; layer-by-layer assembly; room-temperature metallic fusion; tetraoctylammonium thiosulfate-stabilized silver nanoparticles
类别
资金
- National Research Foundation of Korea (NRF) - the Korea government (MSIP
- Ministry of Science, ICT & Future Planning) [2018R1A2A1A05019452]
- National Research Foundation of Korea [2018R1A2A1A05019452] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
To fabricate flexible electrodes, conventional silver (Ag) nanomaterials have been deposited onto flexible substrates, but the formed electrodes display limited electrical conductivity due to residual bulky organic ligands, and thus postsintering processes are required to improve the electrical conductivity. Herein, an entirely different approach is introduced to produce highly flexible electrodes with bulk metal-like electrical conductivity: the room-temperature metallic fusion of multilayered silver nanoparticles (NPs). Synthesized tetraoctylammonium thiosulfate (TOAS)-stabilized Ag NPs are deposited onto flexible substrates by layer-by-layer assembly involving a perfect ligand-exchange reaction between bulky TOAS ligands and small tris(2-aminoethyl) amine linkers. The introduced small linkers substantially reduce the separation distance between neighboring Ag NPs. This shortened interparticle distance, combined with the low cohesive energy of Ag NPs, strongly induces metallic fusion between the close-packed Ag NPs at room temperature without additional treatments, resulting in a high electrical conductivity of approximate to 1.60 x 10(5) S cm(-1) (bulk Ag: approximate to 6.30 x 10(5) S cm(-1)). Furthermore, depositing the TOAS-Ag NPs onto cellulose papers through this approach can convert the insulating substrates into highly flexible and conductive papers that can be used as 3D current collectors for energy-storage devices.
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