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- W4304693981 abstract "• The bifunctional electrocatalyst, Ni(OH) 2 -CNT-Co 3 O 4 /NC, with good ORR and OER performance was prepared by thermal processes of ZIF-67@ZIF-8 and CBD. • The synergistic effect of the Ni(OH) 2 , Co 3 O 4 , N-doping in the catalyst showed high activities compared to the Pt/C and Ir/C catalyst. • The porous and graphitized carbon framework and CNTs in the catalyst are important for the electron conductivity and ion diffusion. • The Zn-air battery with the electrocatalyst demonstrated a high specific capacity of 805.4 mAh g −1 and energy density of 1021.7 Wh Kg −1 . • The charge-discharge tests showed a very stable potential gap (0.65 V) with an excellent retention of 94.5% after 4500 cycles at 10 mA cm −2 . A rechargeable zinc-air battery (RZAB) is a hopeful alternative battery solution to meet the world's ever-increasing energy storage need. Developing a high-performance electrocatalyst is one of the most critical challenges that need to be addressed for the RZAB to fulfill that role. A Ni(OH) 2 -CNT-Co 3 O 4 /NC catalyst consisting of carbon nanotube (CNT), cobalt oxide, and nitrogen-doped functionalities embedded in a porous carbon framework with two-dimensional Ni(OH) 2 nanosheets is reported. The prepared catalytic material, Ni(OH) 2 -CNT-Co 3 O 4 /NC, showed a high limit current density of -6.409 mA cm −2 during the oxygen reduction reaction (ORR), surpassing that of the commercial Pt/C (-5.625 mA cm −2 ). The oxygen evolution reaction (OER) potential for this electrocatalyst also reached 1.653 V at a current density of 10 mA cm −2 , which is close to that of the commercial RuO 2 and thus showed excellent catalytic activity for the OER. As a bifunctional catalyst in the RZAB, the Ni(OH) 2 -CNT-Co 3 O 4 /NC electrocatalyst exhibited a high power density of 244.5 mW cm −2 , and cycled 4500 times at a current density of 10 mA cm −2 while displaying good charge and discharge stability. Based upon these performances, we believe that the Ni(OH) 2 -CNT-Co 3 O 4 /NC catalyst can serve as an excellent bifunctional catalyst in the next-generation RZAB." @default.
- W4304693981 created "2022-10-12" @default.
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- W4304693981 date "2022-11-01" @default.
- W4304693981 modified "2023-10-16" @default.
- W4304693981 title "Nickel hydroxide anchored CNT-Co3O4-N-carbon bifunctional catalyst for rechargeable zinc-air batteries" @default.
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- W4304693981 doi "https://doi.org/10.1016/j.jtice.2022.104559" @default.
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