Efficient interface engineering on the NiO/FeCo2O4 electrode for boosting photo-assisted supercapacitor performance
Efficient interface engineering on the NiO/FeCo2O4 electrode for boosting photo-assisted supercapacitor performance
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NiO/FeCo2O4 电极的高效界面工程可提高光辅助超级电容器性能
DOI:
10.1016/j.jpowsour.2022.231741
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发表时间:
2022-09
影响因子:
9.2
通讯作者:
Yang Wu
中科院分区:
文献类型:
--
作者:
Yunbo Zhang;Yu Zhang;Xueyan Wang;Hui Li;Yang Wu
Photo-assisted energy storage devices provide an appropriate way to recognize the utilization of the unlimited solar energy. Herein, we construct the photoresponsive heterogeneous interfaces between NiO and FeCo2O4to improve the performance for photo-assisted supercapacitor. As expected, the NiO/FeCo2O4electrodes exhibit ultrahigh energy storage capacity of 7933 F g−1at 1 A g−1irradiating by simulated sunlight. In addition, a NiO/FeCo2O4//AC asymmetric supercapacitor is assembled, whose energy density is enhanced from 35.6 Wh kg−1to 61.9 Wh kg−1at the power density of 1.5 kW kg−1under light. Combining with density functional theory (DFT) calculations, it is discovered that the photo-generated electrons would transfer from NiO to FeCo2O4, and then inject into the external circuit. Meanwhile, the photo-generated holes participate the charging process. This work provides a theoretical basis for effectively building heterogeneous interfaces to storage the abundant solar energy.
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