- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Reagentless fabrication of a porous graphene-like electrochemical device from phenolic paper using laser-scribing
摘要： This study fabricated a portable, high-performance, and reagentless electrochemical devices using CO2 laser-scribing process, which allowed localized carbonization of a non-conductive and low-cost polymer platform, i.e., phenolic-paper. The carbonized material was extensively characterized by Raman spectroscopy, XPS, XRD, SEM, and electrochemical impedance spectroscopy. The carbon-based electrodes were obtained from the photothermal process induced by CO2 laser radiation and subsequently subjected to electrochemical treatment to fabricate a functional material with excellent conductivity and low charge-transfer resistance. Additionally, the laser-scribed electrodes presented a porous structure with graphene-like domains, thus indicating both potential for on-site electroanalytical applications and better performance than conventional carbon electrodes.
关键词： Graphene domains,Electrochemical sensors,Disposable devices,Porous material,Laser pyrolysis
更新于2025-09-12 10:27:22
-
Industrial Applications of Nanomaterials || Laser-driven nanomaterials and laser-enabled nanofabrication for industrial applications
摘要： Laser is one of the most important technologies invented in the 20th century. Nowadays, the applications of laser have stretched over a vast spectrum including information technology, optoelectronics, quantum computing, materials characterization, materials processing, advanced three-dimensional (3D) printing, biology, biomedical, etc. In the nanotechnology domain, laser can be used for synthesis, processing, and characterization. In this chapter, we will focus on applying laser for synthesis and processing of nanomaterials as well as nanofabrication.
关键词： nanofabrication,nanomaterials,laser ablation,laser pyrolysis,Laser,carbon-based nanomaterials,industrial applications
更新于2025-09-11 14:15:04
-
Simultaneous densification and nitrogen doping of laser-induced graphene by duplicated pyrolysis for supercapacitor applications
摘要： Laser pyrolysis of polyimide is a facile and cost-effective method to fabricate high performance supercapacitor electrodes. This study proposes a duplicated laser pyrolysis method to densify pyrolyzed carbon electrodes and hence improve electrochemical performance. The initial laser pyrolysis of polyimide generates a graphene-like carbon, called laser-induced graphene (LIG). This LIG is then coated with an additional polyimide layer, and the second laser pyrolysis is applied, producing densified LIG. Laser power effects on densified LIG morphology and electrochemical characteristics are investigated, confirming remarkable density increase. Increased nitrogen content is also observed, signifying significant nitrogen doping. The densified electrode achieves 49.0 mF cm?2 specific capacitance at 0.2 mA cm?2 current density in a standard three-electrode system, approximately 6-fold that for singly pyrolyzed LIG electrodes. A solid-state flexible supercapacitor with densified LIG electrodes is fabricated using a gel electrolyte (PVA-H2SO4), achieving 19.8 mF cm?2 capacitance at 0.05 mA cm?2 current density, with outstanding cyclic charge-discharge stability and mechanical flexibility.
关键词： Nitrogen-doped carbon,Laser pyrolysis,Densification,Laser-induced graphene,Flexible supercapacitors
更新于2025-09-11 14:15:04