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http://hdl.handle.net/10397/95681
Title: | Synergistic regulation of nickel doping/hierarchical structure in cobalt sulfide for high performance zinc-air battery | Authors: | Wang, J Xu, J Guo, X Shen, T Xuan, C Tian, B Wen, Z Zhu, Y Wang, D |
Issue Date: | 5-Dec-2021 | Source: | Applied catalysis B : environmental, 5 Dec. 2021, v. 298, 120539 | Abstract: | Reduced-graphene-nanoribbon supported nickel doped Co9S8 spheres (Ni-Co9S8/rGN) have been successfully constructed. The hierarchical structured sphere assembles by spindle-type nanorods features high surface area and good hydrophilicity property. Excellent OER/ORR activities and long-term stabilities are obtained on Ni-Co9S8/rGN relative to Pt/C and RuO2. Density functional theory calculations demonstrate that nickel dopants in Co9S8 structure effectively optimizes the adsorption properties at the rate-determining steps. Therefore, the synergistic regulation between the rGN covered hierarchical structure and nickel dopants by promoting the intrinsic ORR/OER properties, electrical conductivity, and mass transfer is responsible to the superior catalytic performance. Moreover, as a bi-functional catalyst for liquid and flexible Zn–air batteries, Ni-Co9S8/rGN based battery exhibits excellent battery performance, especially high power density, superior rate performance and long-term cycling stability, providing a new vision for the preparation of high-efficiency catalysts in energy conversion. | Keywords: | Hierarchical porous structure Nickel doped Co9S8 Oxygen reduction/evolution reaction Synergistic regulation Zn-air battery |
Publisher: | Elsevier | Journal: | Applied catalysis B : environmental | ISSN: | 0926-3373 | EISSN: | 1873-3883 | DOI: | 10.1016/j.apcatb.2021.120539 | Rights: | © 2021 Elsevier B.V. All rights reserved. © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Wang, J., Xu, J., Guo, X., Shen, T., Xuan, C., Tian, B., Wen, Z., Zhu, Y., & Wang, D. (2021). Synergistic regulation of nickel doping/hierarchical structure in cobalt sulfide for high performance zinc-air battery. Applied Catalysis B: Environmental, 298, 120539 is available at https://dx.doi.org/10.1016/j.apcatb.2021.120539. |
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