| Title |
Enhanced Methane Gas Sensors Utilizing Lithium-ion Decorated SWCNTs Networks |
| Authors |
(Lae Kim) ; (Myung-Hyun Baek) |
| DOI |
https://doi.org/10.5573/JSTS.2025.25.6.696 |
| Keywords |
Methane gas; SWCNTs; lithium-ion decoration; gas sensors; nanomaterials |
| Abstract |
Methane (CH4) is a colorless, odorless, and highly flammable gas, posing significant health and environmental risks due to its asphyxiant properties and increasing annual emissions. Accurate CH4 monitoring is essential, especially in confined environments, yet current detection solutions remain limited by sensitivity and recovery issues. We fabricated an effective and simple methane gas sensor based on lithium-ion (Li+) decorated single-walled carbon nanotube (SWCNTs) networks. By leveraging the unique interaction between Li+ ions and CH4 molecules, as well as the exceptional conductivity and surface area of SWCNTs, the proposed sensor demonstrates a 157% improvement in sensitivity and a substantial increase in recovery compared to undecorated SWCNT-based devices.
The device demonstrated improved sensitivity and recovery across a range of methane concentrations and humidity levels, suggesting potential for further development toward industrial, environmental, and IoT methane detection applications. |