Nitrogen‐Doped Carbon Nano‐Onions Decorated on Graphene Network: A Novel All‐Carbon Composite Counter Electrode for Dye‐Sensitized Solar Cell with a 10.28% Power Conversion Efficiency,Solar RRL

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Nitrogen‐Doped Carbon Nano‐Onions Decorated on Graphene Network: A Novel All‐Carbon Composite Counter Electrode for Dye‐Sensitized Solar Cell with a 10.28% Power Conversion Efficiency
Solar RRL ( IF 6.0 ) Pub Date : 2020-07-01 , DOI: 10.1002/solr.202000263
Beili Pang ₁ , Meili Zhang ₁ , Cheng Zhou ₁ , Hongzhou Dong ₁ , Shuai Ma ₂ , Yongtang Shi ₁ , Qiong Sun ₁ , Fang Li ₁ , Liyan Yu ₁ , Lifeng Dong _{1,

3}

Affiliation

A desirable counter electrode material for dye‐sensitized solar cells (DSSCs) needs to have superior electrocatalytic activity, low charge‐transfer resistance, and long‐term stability. Herein, the development of a composite of nitrogen‐doped carbon nano‐onions with modified reduced graphene (N‐CNOs/mGr) to achieve these merits is reported. The mGr network has high electrical conductivity to improve charge transfer; the N‐CNOs with pyridinic and graphitic N provide more electrocatalytic active sites for the reduction of I₃⁻ to I⁻, and the carbon composite demonstrates excellent electrochemical stability. The constructed DSSC with the N‐CNOs/mGr electrode presents better long‐term stability and a higher power conversion efficiency of 10.28% than those devices with conventional Pt (6.54%) and mGr (5.11%) electrodes. Therefore, the all carbon‐based composite will open up new opportunities for a variety of electrochemical device applications.

中文翻译：

石墨烯网络上装饰的氮掺杂碳纳米洋葱：一种用于染料敏化太阳能电池的新型全碳复合对电极，功率转换效率为10.28％

染料敏化太阳能电池（DSSC）的理想对电极材料需要具有出色的电催化活性，低电荷转移电阻和长期稳定性。在此，据报道开发了具有改性的还原石墨烯（N-CNOs / mGr）的氮掺杂碳纳米洋葱复合材料，以实现这些优点。mGr网络具有高电导率，可改善电荷转移；在N与CNOS吡啶和石墨型氮提供的还原更电活性位点我₃^-至我^-，并且碳复合材料显示出优异的电化学稳定性。与带有传统Pt（6.54％）和mGr（5.11％）电极的设备相比，带有N-CNOs / mGr电极的DSSC具有更好的长期稳定性和10.28％的更高功率转换效率。因此，全碳基复合材料将为各种电化学装置应用提供新的机会。

更新日期：2020-07-01

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