Hollow twin shell nanocomposite of ultrafine Fe3(PO4)2 embedded N, P, S-doped hierarchical carbon as bifunctional oxygen electrocatalyst for Zn-air batteries. Issue 3 (June 2022)

• Record Type: Journal Article
• Authors: Luan, Xiujuan; Song, Qian; Bian, Weiwei; Li, Xinxuan; Guo, Wenxue; Luo, Haotian; Li, Jing; Sun, Peng; Zheng, Aili; Zhou, Baolong
• Is Part Of: Journal of environmental chemical engineering. Volume 10:Issue 3(2022)
• Publication Date: 2022-06
• Subjects: Hollow dual core-shell nanocomposite -- Fe3(PO4)2 -- N, P, S-doping -- Bifunctional oxygen electrocatalyst -- Rechargeable Zn-air battery; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2022.107693
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: Here, a Fe3 (PO4 )2 encapsulated N, P, S-doped hollow dual shell structured carbon-based nanocomposite (H-PZS-Fe-850), with fully open super-macropores, was developed via a simple but efficient coating-activation synthesis strategy. The incorporation of Fe3 (PO4 )2 in the nanoshell of the composite endowed a fast electron and mass transport activity with the resultant catalyst. As a result, H-PZS-Fe-850 exhibited excellent electrocatalytic activity for both the oxygen reduction (ORR) and oxygen evolution reaction (OER) under alkaline conditions, coupled with excellent selectivity and durability, compared to the commercial benchmark catalyst ( i. e. Pt/C and IrO2 ). Meanwhile, H-PZS-Fe-850 also presented acceptable ORR performance in the acidic and neutral media. It could be translated to a high-performance rechargeable Zn-air battery (ZAB), as evidenced by the prominent charge/discharge performance with long time charging-discharging cycles (>320 h), high specific energy density (827 Wh g −1 Zn ) and superior discharge power density (211 mW cm −2 ), exceeding those of Pt/C-IrO2 catalyzed battery. This work provides an attractive guide for the rational preparation of highly performance oxygen electrocatalysts with controlled composition and morphology, accelerating the real applications of ZABs. Graphical Abstract: A Fe3 (PO4 )2 encapsulated N, P, S-doped hollow dual core-shell structured carbon-based nanocomposite (H-PZS-850), with fully open and 3D interconnected super-macropores, was developed via a simple but efficient coating-activation synthesis strategy. H-PZS-850 exhibited excellent electrocatalytic activity for both the oxygen reduction (ORR) and oxygen evolution reaction (OER) under alkaline conditions, which can translate to high performance breathing ZABs. ga1 Highlights: Fe3 (PO4 )2 implanted hollow twin shell composite (H-PZS-Fe-850) was prepared. H-PZS-Fe-850 showed excellent bifunctional oxygen electrocatalytic activity. H-PZS-Fe-850 showed excellent selectivity and durability as O2 catalyst. H-PZS-Fe-850 showed good performance in a rechargeable Zn-air battery.