Premium
Integrated Photo‐supercapacitor Based on Bi‐polar TiO 2 Nanotube Arrays with Selective One‐Side Plasma‐Assisted Hydrogenation
Author(s) -
Xu Jing,
Wu Hui,
Lu Linfeng,
Leung SiuFung,
Chen Di,
Chen Xiaoyuan,
Fan Zhiyong,
Shen Guozhen,
Li Dongdong
Publication year - 2014
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201303042
Subject(s) - materials science , supercapacitor , optoelectronics , electrode , capacitance , nanotube , anode , dye sensitized solar cell , tandem , nanotechnology , titanium oxide , energy conversion efficiency , chemical engineering , carbon nanotube , composite material , chemistry , electrolyte , engineering
One‐dimensional anodic titanium oxide (ATO) nanotube arrays hold great potential as electrode materials for both dye‐sensitized solar cells (DSSCs) and electrochemical supercapacitors (SCs). In this work, a novel stack‐integrated photo‐supercapacitor (PSC) thin‐film device is presented, composed of a DSSC and a SC built on bi‐polar ATO nanotube arrays, where an improved SC performance is achieved through selective plasma‐assisted hydrogenation treatment. At a high current density of 1 mA/cm 2 in charge/discharge measurements, the areal capacitance of selective hydrogenated ATO two‐electrode sub‐device is substantially increased ∼5.1 times, with the value as high as 1.100 mF/cm 2 . The optimized PSC exhibits a remarkable overall photoelectric conversion and storage efficiency up to 1.64%, with fast response and superior cycling capability for more than 100 photocharge/galvanostatic discharge cycles without any decay. To meet applicable demands with a larger output voltage, a tandem PSC system is constructed, serving as the self‐driven power source for an LED.