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https://hdl.handle.net/2440/126354
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Type: | Journal article |
Title: | Rational design of LaNiO₃/carbon composites as outstanding platinum-free photocathodes in dye-sensitized solar cells with enhanced catalysis for the triiodide reduction reaction |
Other Titles: | Rational design of LaNiO(3)/carbon composites as outstanding platinum-free photocathodes in dye-sensitized solar cells with enhanced catalysis for the triiodide reduction reaction |
Author: | Wang, W. Liu, Y. Zhong, Y. Wang, L. Zhou, W. Wang, S. Tade, M.O. Shao, Z. |
Citation: | Solar Rrl, 2017; 1(7):1700074-1-1700074-9 |
Publisher: | Wiley-Blackwell |
Issue Date: | 2017 |
ISSN: | 2367-198X 2367-198X |
Statement of Responsibility: | Wei Wang, Yu Liu, Yijun Zhong, Lianzhou Wang, Wei Zhou, Shaobin Wang, Moses O. Tadé, and Zongping Shao |
Abstract: | In many photovoltaics (PVs), including dye‐sensitized solar cells (DSSCs), triiodide/iodide (I₃⁻/I⁻) redox couple plays an important role, and an active and stable electrocatalyst is required for promoting I₃⁻ reduction reaction (IRR) to minimize efficiency losses. Platinum (Pt) is the state‐of‐the‐art electrocatalyst for IRR, which unfortunately suffers from high cost and poor stability. Herein, strongly coupled LaNiO₃ perovskite/carbon composites are developed for the first time as highly efficient, stable and low‐cost electrocatalysts for IRR to enable better DSSCs. High‐energy ball milling of crystallized LaNiO₃ with carbon material is applied for the facile synthesis of LaNiO₃/carbon composites. This ball‐milling process simultaneously leads to partial reduction of LaNiO₃ by carbon with the creation of oxygen vacancies inside the perovskite oxide lattice, a decrease in LaNiO₃ particle size and the creation of strong coupling between LaNiO₃ and carbon. Particularly, DSSC with LaNiO₃/multi‐walled carbon nanotubes photocathode delivers a high power conversion efficiency of 9.81% with an attractive enhancement of 21% compared with Pt electrocatalyst, superior to most state‐of‐the‐art highly efficient Pt‐free photocathodes in DSSCs. LaNiO₃ or carbon alone demonstrates a much poorer performance. Moreover, LaNiO₃/carbon composites demonstrate excellent operational stability. This study highlights the extended applications of perovskites in other I₃⁻/I⁻‐mediated PVs, electrochromic devices or batteries. |
Keywords: | dye-sensitized solar cells; electrocatalyst; perovskite/carbon composite; photocathode; triiodide reduction reaction |
Description: | Published online: June 20, 2017 |
Rights: | © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
DOI: | 10.1002/solr.201700074 |
Grant ID: | http://purl.org/au-research/grants/arc/DP150104365 http://purl.org/au-research/grants/arc/DP160104835 |
Published version: | http://dx.doi.org/10.1002/solr.201700074 |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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