Evaluation of Graphene Oxide as a protective Coating for Fiber Optic Sensors in Corrosive Environments
2023 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE credits
Student thesis
Abstract [sv]
För att veta om ett batteri behöver ersättas är det viktigt att kunna mäta temperaturen i det. Denna studie testar om en fiberoptisk sensor täckt med grafenoxid kan stå emot de skadliga kemikalier som finns i ett batteri. En surface plasmon resonance-sensor täcktes med grafenoxid och sedan mättes transmissionen och absorptionen av ljus för att se om känsligheten förändrades när fler lager lades till. Därefter doppades fibrerna i ett etsmedel för att se ifall grafenoxidlagren kunde skydda sensorn. Resultaten visade att känsligheten inte påverkas av upp till tio lager grafenoxid och att fem till tio lager ger bäst skydd mot etsmedlet.
Abstract [en]
Measuring the temperature inside a lithium-ion battery gives valuable information about its health. This investigation tests if a fiber optic surface plasmon resonance sensor can be protected from the harsh chemical environment inside a battery using graphene oxide. Gold covered surface plasmon resonance sensors were dip coated in different amounts of graphene oxide. Transmission and absorption measurements were then made to see if the sensitivity was affected by the coating. The fibers were then dipped in a gold etchant to evaluate how long the graphene oxide could protect the gold. Results showed that adding graphene oxide to the sensors did not affect sensitivity or sensor function. It was also showed that five to ten layers provided the best protection against the etchant.
Place, publisher, year, edition, pages
2023. , p. 34
Keywords [en]
Fiber optic sensors, surface plasmon resonance, graphene oxide, lithium-ion batteries, spectroscopy
Keywords [sv]
Fiberoptiska sensorer, ytplasmonresonans, grafenoxid, litiumjonbatterier, spektroskopi
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-48769OAI: oai:DiVA.org:miun-48769DiVA, id: diva2:1777784
Subject / course
Electrical Engineering ET2
Educational program
Civilingenjör i elektroteknik TELTA 300 hp
Supervisors
Examiners
2023-06-302023-06-302023-06-30Bibliographically approved