2020
DOI: 10.1007/s40820-020-00468-4
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A Porous Nano-Micro-Composite as a High-Performance Bi-Functional Air Electrode with Remarkable Stability for Rechargeable Zinc–Air Batteries

Abstract: The development of bi-functional electrocatalyst with high catalytic activity and stable performance for both oxygen evolution/reduction reactions (OER/ORR) in aqueous alkaline solution is key to realize practical application of zinc–air batteries (ZABs). In this study, we reported a new porous nano-micro-composite as a bi-functional electrocatalyst for ZABs, devised by the in situ growth of metal–organic framework (MOF) nanocrystals onto the micrometer-sized Ba0.5Sr0.5Co0.8Fe0.2O3 (BSCF) perovskite oxide. Upo… Show more

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Cited by 61 publications
(32 citation statements)
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“…In comparison, pristine PBMNC‐0.1 NS cathode degrades within an hour whereas Pt/C‐RuO 2 couple lasts up to 15 h. Moreover, the long‐term cyclic stability test for PBMNC/LDH‐20 cathode shows only 0.46 V increase in charge‐discharge voltage gap after 100 h (Figure 4d). The cathodic performance of PBMNC/LDH‐20 is at par with the recent reports on similar composite systems (Table S5) [14,20,34,37–40] …”
Section: Resultssupporting
confidence: 75%
“…In comparison, pristine PBMNC‐0.1 NS cathode degrades within an hour whereas Pt/C‐RuO 2 couple lasts up to 15 h. Moreover, the long‐term cyclic stability test for PBMNC/LDH‐20 cathode shows only 0.46 V increase in charge‐discharge voltage gap after 100 h (Figure 4d). The cathodic performance of PBMNC/LDH‐20 is at par with the recent reports on similar composite systems (Table S5) [14,20,34,37–40] …”
Section: Resultssupporting
confidence: 75%
“…The Co−MnO 2 also presented an electron transfer number ( n ) of 3.96, which is close to 4 (Figure S3). This result indicates that most of the oxygen undergoes a four‐electron reduction process, which leads to a high selectivity for the OH − production [57–59] . In Figure 2b, Co−MnO 2 and Ni‐MnO 2 presented improved OER catalysis, which could be highly associated with the introduced Co and Ni and the oxygen defects.…”
Section: Resultsmentioning
confidence: 88%
“…The transfer number of ≈4 indicates the predominant 4‐electron transfer process for OH − yielding. [ 51–53 ] MnS also shows a fair OER activity with a potential of 1.813 V at 10 mA cm −2 ( E j =10 ). While the ORR activity of Ni x Co 1− x S 2 ( E 1/2 = 0.710 V) is inferior to MnS, Ni x Co 1− x S 2 material shows a more favorable OER activity indicated by a E j =10 of 1.610 V. It suggests that the introduction of Ni x Co 1− x S 2 into the MnS will realize a significant improvement of the OER activity.…”
Section: Resultsmentioning
confidence: 99%