Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Wet Transfer of Inkjet Printed Graphene for Microsupercapacitors on Arbitrary Substrates
KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik, Integrerade komponenter och kretsar.ORCID-id: 0000-0001-9329-9088
KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik, Integrerade komponenter och kretsar.ORCID-id: 0000-0002-5845-3032
KTH, Skolan för elektroteknik och datavetenskap (EECS).ORCID-id: 0000-0002-6430-6135
2019 (Engelska)Ingår i: ACS Applied Energy Materials, ISSN 2574-0962, Vol. 2, nr 1, s. 158-163Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Significant research interest is being devoted to exploiting the properties of graphene but the difficult integration on various substrates limits its use. In this regard, we developed a transfer technique that allows the direct deposition of inkjet printed graphene devices on arbitrary substrates, even 3D objects and living plants. With this technique, we fabricated micro-supercapacitors, which exhibited good adhesion on almost all substrates and no performance degradation induced by the process. Specifically, the microsupercapacitor on an orchid leaf showed an areal capacitance as high as 441 mu F cm(-2) and a volumetric capacitance of 1.16 F cm(-3). This technique can boost the use of graphene in key technological applications, such as self powered epidermal electronics and environmental monitoring systems.

Ort, förlag, år, upplaga, sidor
American Chemical Society (ACS), 2019. Vol. 2, nr 1, s. 158-163
Nyckelord [en]
graphene, wet transfer, inkjet printing, microsupercapacitors, arbitrary substrates
Nationell ämneskategori
Annan elektroteknik och elektronik
Identifikatorer
URN: urn:nbn:se:kth:diva-245956DOI: 10.1021/acsaem.8b01225ISI: 000458706900019OAI: oai:DiVA.org:kth-245956DiVA, id: diva2:1296024
Anmärkning

QC 20190313

Tillgänglig från: 2019-03-13 Skapad: 2019-03-13 Senast uppdaterad: 2019-08-16Bibliografiskt granskad
Ingår i avhandling
1. Inkjet Printing of Graphene-based Microsupercapacitors for Miniaturized Energy Storage Applications
Öppna denna publikation i ny flik eller fönster >>Inkjet Printing of Graphene-based Microsupercapacitors for Miniaturized Energy Storage Applications
2019 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Printing technologies are becoming increasingly popular because they enable the large-scale and low-cost production of functional devices with various designs, functions, mechanical properties and materials. Among these technologies, inkjet printing is promising thanks to its direct (mask-free) patterning, non-contact nature, low material waste, resolution down to 10 µm, and compatibility with a broad range of materials and substrates. As a result, inkjet printing has applications in several fields like wearables, opto-electronics, thin-film transistors, displays, photovoltaic devices, and in energy storage. It's in energy storage that the technique shows its full potential by allowing the production of miniaturized devices with a compact form factor, high power density and long cycle life, called microsupercapacitors (MSCs). To this end, graphene has a number of remarkable properties like high electrical conductivity, large surface area, elasticity and transparency, making it a top candidate as an electrode material for MSCs.

Some key drawbacks limit the use of inkjet printing for the production of graphene-based MSCs. This thesis aims at improving its scalability by producing fully inkjet printed devices, and extending its applications through the integration of inkjet printing with other fabrication techniques.

MSCs typically rely on the deposition by hand of gel electrolyte that is not printable or by submerging the whole structure into liquid electrolyte. Because of this, so far large-scale production of more than 10 interconnected devices has not been attempted. In this thesis, a printable gel electrolyte ink based on poly(4-styrene sulfonic acid) was developed, allowing the production of large arrays of more than 100 fully inkjet printed devices connected in series and parallel that can be reliably charged up to 12 V. Also, a second electrolyte ink based on nano-graphene oxide, a solid-state material with high ionic conductivity, was formulated to optimize the volumetric performance of these devices. The resulting MSCs were also fully inkjet printed and exhibited an overall device thickness of around 1 µm, yielding a power density of 80 mW cm-3.

Next, the use of inkjet printing of graphene was explored for the fabrication of transparent MSCs. This application is typically hindered by the so-called coffee-ring effect, which creates dark deposits on the edges of the drying patterns and depletes material from the inside area. In light of this issue, inkjet printing was combined with etching to remove the dark deposits thus leaving uniform and thin films of graphene with vertical sidewalls. The resulting devices showed a transmittance of up to 90%.

Finally, the issue of the substrate compatibility of inkjet printed graphene was addressed. Although inkjet printing is considered to have broad substrate versatility, it is unreliable on hydrophilic or porous substrates and most inks (including graphene inks) require thermal annealing that damages substrates that are not resistant to heat. Accordingly, a technique based on inkjet printing and wet transfer was developed to reliably deposit graphene-based MSCs on a number of substrates, including flat, 3D, porous, plastics and biological (plants and fruits) with adverse surfaces.

The contributions of this thesis have the potential to boost the use of inkjet printed MSCs in applications requiring scalability and resolution (e.g. on-chip integration) as well as applications requiring conformability and versatility (e.g. wearable electronics).

Ort, förlag, år, upplaga, sidor
KTH Royal Institute of Technology, 2019. s. 73
Serie
TRITA-EECS-AVL ; 2019:61
Nyckelord
Inkjet printing, graphene, supercapacitor, microsupercapacitor, energy storage, printed electronics, printing technologies
Nationell ämneskategori
Elektroteknik och elektronik
Forskningsämne
Informations- och kommunikationsteknik
Identifikatorer
urn:nbn:se:kth:diva-256035 (URN)978-91-7873-255-5 (ISBN)
Disputation
2019-09-13, Sal B, Electrum, Kistagången 16, Kungliga tekniska högskolan, Kista, 13:00 (Engelska)
Opponent
Handledare
Forskningsfinansiär
Vetenskapsrådet
Anmärkning

QC 20190816

Tillgänglig från: 2019-08-16 Skapad: 2019-08-16 Senast uppdaterad: 2019-08-16Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltext

Personposter BETA

Östling, MikaelLi, Jiantong

Sök vidare i DiVA

Av författaren/redaktören
Delekta, Szymon SollamiÖstling, MikaelLi, Jiantong
Av organisationen
Integrerade komponenter och kretsarSkolan för elektroteknik och datavetenskap (EECS)
Annan elektroteknik och elektronik

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 273 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf