In this section, you can access to the latest technical information related to the FUTURE project topic.

Iron-modulated nickel cobalt phosphide embedded in carbon to boost power density of hybrid sodium?air battery

Nickel cobalt phosphide (NiCoP) is emerging as a potential electrocatalyst towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). However, its ORR/OER activities are sluggish. Here, we investigated the roles of iron dopants in the Fe-doped NiCoP (Fe?NiCoP) in order to boost its ORR/OER kinetics. The density functional theory (DFT) calculations reveal that the Fe dopant effectively modulates the electron conductivity of NiCoP and reduces binding energies of the reaction intermediates towards rate-determining steps of ORR and OER. A binder-free 3D microflowers morphology of the Fe?NiCoP embedded in the amorphous carbon layer (Fe?[email protected]) catalyst on the nickel foam was prepared as the air cathode for the hybrid sodium-air battery (HSAB). The HSAB displays a discharge voltage of 2.74 V at 0.01 mA cm?2 with excellent round trip efficiency of 93.26 % at the 500th cycle and state-of-the-art power density of 621 mW g?1.

» Author: Yao Kang, Shuo Wang, Siqi Zhu, Haixing Gao, Kwan San Hui, Cheng-Zong Yuan, Hong Yin, Feng Bin, Xi-Lin Wu, Wenjie Mai, Ling Zhu, Maocong Hu, Feng Liang, Fuming Chen, Kwun Nam Hui

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