Single‐Atom Fe‐Nx‐C as an Efficient Electrocatalyst for Zinc–Air Batteries

Advanced Functional Materials - Tập 29 Số 41 - 2019
Junxing Han1,2, Xiaoyi Meng1,2, Liang Lu1, Juanjuan Bian1,2, Zhipeng Li3, Chunwen Sun1,4,2
1CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P. R. China
2School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
3Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083 P. R. China
4Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning Shi, Guangxi, 530004 P. R. China

Tóm tắt

AbstractHighly efficient non‐noble metal electrocatalysts are vital for metal–air batteries and fuel cells. Herein, a noble‐metal–free single‐atom Fe‐N x‐C electrocatalyst is synthesized by incorporating Fe‐Phen complexes into the nanocages in situ during the growth of ZIF‐8, followed by pyrolysis at 900 °C under inert atmosphere. Fe‐Phen species provide both Fe2+ and the organic ligand (Phen) simultaneously, which play significant roles in preparing single‐atom catalysts. The obtained Fe‐Nx‐C exhibits a half‐wave potential of 0.91 V for the oxygen reduction reaction, higher than that of commercial Pt/C (0.82 V). As a cathode catalyst for primary zinc–air batteries (ZABs), the battery shows excellent electrochemical performances in terms of the high open‐circuit voltage (OCV) of 1.51 V and a high power density of 96.4 mW cm−2. The rechargeable ZAB with Fe‐Nx‐C catalyst and the alkaline electrolyte shows a remarkable cycling performance for 300 h with an initial round‐trip efficiency of 59.6%. Furthermore, the rechargeable all‐solid‐state ZABs with the Fe‐Nx‐C catalyst show high OCV of 1.49 V, long cycle life for 120 h, and foldability. The single‐atom Fe‐Nx‐C electrocatalyst may function as a promising catalyst for various metal–air batteries and fuel cells.

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Tài liệu tham khảo

10.1126/science.1258307

10.1038/nchem.1069

10.1002/ange.201702430

10.1002/adma.201601781

10.1021/ja501877e

10.1038/ncomms2812

10.1002/adfm.201702300

10.1002/adfm.201701833

10.1002/adfm.201705048

10.1002/adfm.201802596

10.1016/j.nanoen.2018.06.023

10.1002/ange.201804349

10.1002/anie.201610119

10.1021/acsnano.7b09064

10.1126/science.aan6245

10.1021/jacs.7b06514

10.1002/anie.201702473

10.1016/j.nanoen.2016.04.042

10.1126/science.1242005

10.1038/nchem.1645

10.1021/jacs.7b10385

10.1038/ncomms5973

10.1039/C7NR04349J

10.1002/adfm.201705094

10.1002/aenm.201601172

10.1002/adma.201704609

10.1002/adma.201703185

10.1002/adfm.201704638

10.1021/acsnano.7b08721

10.1002/advs.201700691

10.1002/aenm.201602420

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Advanced Functional Materials

Tập 29 Số 41

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