Geometry-enhanced ultra-long TiO2 nanobelts in an all-vanadium photoelectrochemical cell for efficient storage of solar energy

被引：27

作者：

Wei, Zi ^{[1
]}

Shen, Yi ^{[1
]}

Liu, Dong ^{[1
]}

Hsu, Chiajen ^{[1
]}

Sajjad, Syed D. ^{[1
]}

Rajeshwar, Krishnan ^{[2
]}

Liu, Fuqiang ^{[1
]}

机构：

[1] Univ Texas Arlington, Dept Mat Sci & Engn, Electrochem Energy Lab, Arlington, TX 76019 USA

[2] Univ Texas Arlington, Dept Chem & Biochem, Arlington, TX 76019 USA

来源：

NANO ENERGY | 2016年 / 26卷

基金：

美国国家科学基金会;

关键词：

Vanadium redox; Photoelectrochemical storage cell; TiO2; Solar energy; PHOTOCATALYTIC ACTIVITY; FLOW BATTERY; ANATASE; REDOX; CONVERSION; PERCENTAGE; SYNERGY; GROWTH; PHASE; WATER;

D O I：

10.1016/j.nanoen.2016.05.014

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Direct capture and storage of abundant but intermittent solar energy using storage devices are of paramount importance in development of sustainable energy, yet the daunting challenge is to enhance the conversion efficiency. Here we report an all-vanadium (all-V) photoelectrochemical storage cell (PESC) using geometry-enhanced ultra-long TiO2 nanobelts (TNBs) to significantly improve solar energy storage efficiency. The TNBs are synthesized using a simple stirring-assisted hydrothermal method, where the stirring speed is adopted to effectively tune the geometry and structure of the TNBs. We demonstrate that highly efficient solar energy storage is realized by ultra-quick oxidization and reduction reaction of vanadium ions with, respectively, holes and electrons produced on the TNB surface. The obtained incident photon-to-current efficiency (IPCE) is similar to 22% at 350 nm without any external bias, double that of commercial P25 TiO2 (similar to 11%). The observed improved efficiency results from enhanced photoactivity and charge separation in the semiconductor, and mass transport of vanadium ions in the photoelectrode. (C\) 2016 Elsevier Ltd. All rights reserved.

引用

页码：200 / 207

页数：8

共 39 条

[1] Electronic conductivity in nanostructured TiO2 films permeated with electrolyte [J].

Abayev, I ;

Zaban, A ;

Fabregat-Santiago, F ;

Bisquert, J .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 2003, 196 (01) :R4-R6

[2] Enhanced charge-discharge characteristics of RuO2 supercapacitors on heat-treated TiO2 nanorods [J].

Ahn, Young Rack ;

Park, Chong Rae ;

Jo, Seong Mu ;

Kim, Dong Young .

APPLIED PHYSICS LETTERS, 2007, 90 (12)

[3] Raman Microspectrometry Applied to the Study of Electrode Materials for Lithium Batteries [J].

Baddour-Hadjean, Rita ;

Pereira-Ramos, Jean-Pierre .

CHEMICAL REVIEWS, 2010, 110 (03) :1278-1319

[4] Prediction of TiO2 nanoparticle phase and shape transitions controlled by surface chemistry [J].

Barnard, AS ;

Curtiss, LA .

NANO LETTERS, 2005, 5 (07) :1261-1266

[5] Growth kinetics of ZnO nanorods: Capping-dependent mechanism and other interesting features [J].

Biswas, Kanishka ;

Das, Barun ;

Rao, C. N. R. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (07) :2404-2411

[6] An Integrated "Energy Wire" for both Photoelectric Conversion and Energy Storage [J].

Chen, Tao ;

Qiu, Longbin ;

Yang, Zhibin ;

Cai, Zhenbo ;

Ren, Jing ;

Li, Houpu ;

Lin, Huijuan ;

Sun, Xuemei ;

Peng, Huisheng .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2012, 51 (48) :11977-11980

[7]

Ding-Wen C., 2013, Modell. Simul. Mater. Sci. Eng, V21, P7, DOI [10.1088/0965-0393/21/7/074009, DOI 10.1088/0965-0393/21/7/074009]

[8]

Feng X., 2012, ANGEW CHEM, V124, P2781, DOI DOI 10.1002/ANGE.201108076

[9] ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE [J].

FUJISHIMA, A ;

HONDA, K .

NATURE, 1972, 238 (5358) :37-+

[10] An Integrated Power Pack of Dye-Sensitized Solar Cell and Li Battery Based on Double-Sided TiO2 Nanotube Arrays [J].

Guo, Wenxi ;

Xue, Xinyu ;

Wang, Sihong ;

Lin, Changjian ;

Wang, Zhong Lin .

NANO LETTERS, 2012, 12 (05) :2520-2523

← 1 2 3 4 →