Commercial-level mass-loading MnO2 with ion diffusion channels for high-performance aqueous energy storage devices
| العنوان: | Commercial-level mass-loading MnO2 with ion diffusion channels for high-performance aqueous energy storage devices |
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| المؤلفون: | Yaxiong Zhang, Yupeng Liu, Erqing Xie, Yin Wu, Jiecai Fu, Jinyuan Zhou, Xiaosha Cui, Zhenxing Zhang |
| المصدر: | Journal of Materials Chemistry A. 9:17945-17954 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Supercapacitor, Aqueous solution, Materials science, Renewable Energy, Sustainability and the Environment, General Chemistry, Electrolyte, Electrochemistry, Energy storage, Cathode, law.invention, Ion, Chemical engineering, law, Electrode, General Materials Science |
| الوصف: | Transition metal oxides have shown renewed interest as promising electrode materials for high-performance electrochemical energy storage devices. However, their cycle stability deteriorates significantly with increasing mass loading due to the sluggish electrolyte ion diffusion kinetics and limited accessible surface area. Herein, commercial-level mass-loading MnO2 up to 9.14 mg cm−2 with rational ion diffusion channels was fabricated by a gassing-assisted electrodeposition route, in which MnO2 was deposited at an over-potential with an obvious oxygen evolution reaction. The robust channels in MnO2 not only facilitate the electrolyte ion diffusion process but also increase the accessible area for the insertion/extraction of electrolyte ions during electrochemical reactions. The resultant MnO2-based electrode exhibits the highest areal capacitance of 1.57 F cm−2 (in a Na+-based aqueous electrolyte), with a rate retention percentage of 76% when the current density increases by 20-fold. More impressively, the configured hybrid ion supercapacitor device with the fabricated MnO2 as a cathode delivers excellent cycle stability (in ion electrolytes Na+, Zn2+, and Mg2+), superior to most reported state-of-the-art energy storage devices. The proposed strategy here will provide a new opportunity for promoting the further development and practical application of aqueous energy storage devices by enhancing the true performance under a commercial-level mass-loading. |
| تدمد: | 2050-7496 2050-7488 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::e3fb32d55eb8f3e48c6a1156c635d810 https://doi.org/10.1039/d1ta04850c |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........e3fb32d55eb8f3e48c6a1156c635d810 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20507496 20507488 |
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