Performances of MnWO4@AC mixed oxide composite materials as Pt-free counter electrodes for high efficiently dye sensitized solar cells,New Journal of Chemistry

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Performances of MnWO4@AC mixed oxide composite materials as Pt-free counter electrodes for high efficiently dye sensitized solar cells
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2021-1-11 , DOI: 10.1039/d0nj05541g
Kezhong Wu _{1,

2,

3,

4,

5} , Pengyuan Fu _{1,

2,

3,

4,

5} , Bei Ruan _{1,

2,

3,

4,

5} , Mengmeng Wu _{1,

2,

3,

4,

5} , Mingxing Wu _{1,

2,

3,

4,

5} , Ruitao Wu _{1,

2,

3,

4,

5}

Affiliation

Replacing the expensive Pt catalyst of counter electrodes (CEs) with a low-cost Pt-free catalyst has been regarded as one of the crucial steps for cost effectiveness of dye-sensitized solar cells (DSSCs). Herein, MnWO₄ as a binary mixed oxide (MnO–WO₃) has been prepared with (NH₄)₁₀H₂(W₂O₇)₆·xH₂O and Mn(NO₃)₂·4H₂O via a facile hydrothermal method. DSSCs using MnWO₄ CEs show power conversion efficiency (PCE) of 4.93%. To improve the catalytic activity of MnWO₄ CEs further, three proportions of MnWO₄@AC mixed oxide composite catalysts have been fabricated via simple physical mixing MnWO₄ with activated carbon (AC) by ball-milling. Moreover, the DSSCs with the MnWO₄@AC composites CEs generate high PCE of 6.50, 6.45 and 6.12%, respectively, from MnWO₄ : AC mass ratios of 1 : 2, 1 : 1 and 2 : 1 for the regeneration of traditional iodide/triiodide (I₃⁻/I⁻) redox couples, which were superior to the pristine MnWO₄, Pt- and AC-based counterpart 4.93%, 4.54% and 2.10% CEs under the same test conditions and method. The favorable performances make MnWO₄@AC composites act as a new resource of electro-catalytic Pt-free materials for high-performance CEs in the encapsulation of DSSCs.

中文翻译：

MnWO4 @ AC复合氧化物复合材料作为高效无铅对电极的高效染料敏化太阳能电池的性能

用低成本的无Pt催化剂代替对电极（CEs）的昂贵Pt催化剂已被视为提高染料敏化太阳能电池（DSSC）成本效益的关键步骤之一。在此，通过（NH ₄）₁₀ H ₂（W ₂ O ₇）₆ · x H ₂ O和Mn（NO ₃）₂ ·4H ₂ O制备了作为二元混合氧化物（MnO–WO ₃）的MnWO ₄。一种简便的水热法。使用MnWO _4的DSSCCE的功率转换效率（PCE）为4.93％。为了进一步提高MnWO ₄ CEs的催化活性，通过球磨将MnWO ₄与活性炭（AC）进行简单的物理混合，制备了三部分MnWO ₄ @AC混合氧化物复合催化剂。此外，具有MnWO ₄ @AC复合材料CE的DSSC从MnWO ₄ ：AC质量比为1：2、1：1和2：1的再生中分别产生6.50％，6.45％和6.12％的高PCE。/三碘化物（I ₃^- / I ^-）的氧化还原对，这是优于原始MnWO ₄，Pt和AC基的CE在相同的测试条件和方法下分别为4.93％，4.54％和2.10％。良好的性能使MnWO ₄ @AC复合材料成为DSSC封装中高性能CE的无电催化Pt材料的新资源。

更新日期：2021-01-11

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