Egg albumen templated graphene foams for high-performance supercapacitor electrodes and electrochemical sensors
Artikel i vetenskaplig tidskrift, 2018
We demonstrate a simple and scalable strategy to obtain N, S and Si co-doped biocompatible graphene foams (GFs) with different shapes using egg albumen as the template. The unique porous structure and element doping endow the GFs with a high charge-discharge rate and good wettability, which largely improve the electrochemical performance of the electrodes, including ultrahigh specific capacitance (534 F g-1at 1 A g-1), and excellent rate capability (308 F g-1at 100 A g-1) and cycling performance (96.1% retention of the initial capacitance after 10000 cycles at a high current density of 10 A g-1). Besides, when used as an electrochemical sensor for dopamine, the GF exhibits a detection limit as low as 1.2 μM with a linear response up to 70 μM, due to the low equivalent series resistance. These reveal great potential for promoting the application of 3D graphene in energy storage and electrochemical sensors.
Författare
Ya Liu
Fudan University
Chalmers, Mikroteknologi och nanovetenskap
Xiaoli Zhao
Fudan University
Cancan Wang
Fudan University
Long Zhang
Fudan University
Mengxiong Li
Fudan University
Yunmei Pan
Fudan University
Yifeng Fu
Chalmers, Mikroteknologi och nanovetenskap, Elektronikmaterial
Johan Liu
Shanghai University
Chalmers, Mikroteknologi och nanovetenskap, Elektronikmaterial
Hongbin Lu
Fudan University
Journal of Materials Chemistry A
20507488 (ISSN) 20507496 (eISSN)
Vol. 6 37 18267-18275Ämneskategorier
Oorganisk kemi
Materialkemi
Annan kemiteknik
DOI
10.1039/c8ta04561e