A Hierarchical Carbon/Metal Nanostructure with Combination of 0D Nanoparticles, 1D Nanofibers, and 2D Nanosheets as an Efficient Bifunctional Catalyst for Zn‐Air Battery

2021 ◽  
Author(s):  
Ximeng Yin ◽  
Qian Liu ◽  
Yichun Ding ◽  
Kai Chen ◽  
Pingwei Cai ◽  
...  
Keyword(s):  
Bifunctional Catalyst ◽  
Metal Nanostructure ◽  
Air Battery ◽  
2D Nanosheets ◽  
Hierarchical Carbon

Facile method of selective dissolution for preparation of Co3O4/LaCoO3 as bifunctional catalyst for Al/Zn-air battery

2021 ◽  
Author(s):  
Shanshan Yan ◽  
Liyang Wan ◽  
Yejian Xue ◽  
Yan Wang ◽  
Guangjie Shao ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Surface Defects ◽  
Selective Dissolution ◽  
Bifunctional Catalyst ◽  
Catalytic Activities ◽  
Air Battery

Perovskites are promising catalysts for metal-air batteries because of their excellent intrinsic catalytic activities. However, the low specific surface area and less surface defects lead to low catalytic activities regarding...

Coordinated Co-NC/CoFe Dual Active Centre Embedded Three-dimensional Ordered Macroporous Framework as Bifunctional Catalyst for Efficient and Stable Zinc-Air Batteries

2021 ◽  
Author(s):  
Tongtao Wan ◽  
Chenhui Yang ◽  
Ximeng Zhao ◽  
Qinglin Han ◽  
Zisheng Zhang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Bifunctional Catalyst ◽  
Reduction Reaction ◽  
Active Centre ◽  
Half Wave ◽  
Air Battery ◽  
Ordered Macroporous ◽  
Spinel Cufe2o4 ◽  
A Current ◽  
Zinc Air Batteries

Abstract Developing efficient and stable multifunctional electrocatalyst is very important for zinc-air batteries in practical. Herein, semiconductive spinel CuFe2O4 supported Co-N co-doped carbon (Co-NC) and CoFe alloy nanoparticles were proposed. In this strategy, the three-dimensional ordered macroporous CuFe2O4 support provides rich channels for mass transmission, revealling good corrosion resistance and durability at the same time. ZIF-67 derived Co-NC decoration improves the conductivity of the catalyst. Further, the uniformlydistributed Co-NC and CoFe nanoparticles (C/CF) dramatically promote the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) performance. Accordingly, C/CF@CuFe2O4 catalyst shows remarkable bifunctional electrocatalytic activity, with an ORR half-wave potential of 0.86 V, and an OER over-potential of 0.46 V at 10 mA cm-2. The zinc-air battery using this catalyst exhibits a power density of 95.5 mW cm-2 and a durable cyclability for over 170 h at a current density of 10 mA cm-2, which implies a great potential in practical application.

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