Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6609996 | Electrochimica Acta | 2015 | 8 Pages |
Abstract
Human hair is a cheap and easily available source of carbon to be used as high performance electrode for electrochemical energy storage devices. In the present work, human hair is pre-treated and then activated using NaOH before being employed as electrode. The resulted activated carbon (ACHH) exhibits a high specific surface area of 1116 m2 gâ1 which is one of the pre-requisite for it to be used as an electrode for supercapacitor applications. ACHH delivered a specific capacitance of â¼115 F gâ1 at a current density of 100 mA gâ1 in single electrode configuration with Li in the presence of organic medium. This result was followed by the fabrication of symmetric supercapacitor and delivered an energy density of 19.2 Wh kgâ1. The energy density has been further improved by introducing an insertion type electrode, Li4Ti5O12 in Li-ion hybrid electrochemical capacitor (Li-HEC) assembly. The combined battery-supercapacitor type reactions in Li-HEC recorded the maximum energy density of 23 Wh kgâ1. An excellent cycleability is noted for both symmetric and Li-HEC in an organic medium.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Rohit Satish, Vanchiappan Aravindan, Wong Chui Ling, Ng Kee Woei, Srinivasan Madhavi,