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dc.contributor.authorZhao, Ruopengen_US
dc.contributor.authorLi, Qinghuaen_US
dc.contributor.authorChen, Zhijingen_US
dc.contributor.authorJose, Vishalen_US
dc.contributor.authorJiang, Xianen_US
dc.contributor.authorFu, Gengtaoen_US
dc.contributor.authorLee, Jong-Minen_US
dc.contributor.authorHuang, Shaomingen_US
dc.identifier.citationZhao, R., Li, Q., Chen, Z., Jose, V., Jiang, X., Fu, G., Lee, J. & Huang, S. (2020). B, N-doped ultrathin carbon nanosheet superstructure for high-performance oxygen reduction reaction in rechargeable zinc-air battery. Carbon, 164, 398-406.
dc.description.abstractRational structure design, composition control and heteroatom doping are efficient strategies to achieve excellent electrocatalysts for the oxygen reduction reaction (ORR) in fuel cells or metal-air batteries. Herein, a facile and efficient approach to prepare ultrathin carbon nanosheet superstructure (BN/C) with high B, N-doping level by using sodium chloride (NaCl)-assisted pyrolysis method is proposed. The developed BN/C catalyst exhibits good catalytic activity for ORR in alkaline medium with a half-wave potential (E½) of 0.8 V, which is comparable to that of commercial Pt/C. The BN/C catalyst also shows much better long-term stability and satisfactory tolerance for the methanol crossover effect. This excellent performance is attributed to the structure and composition characteristics of BN/C, including the large surface area (1085 m² g⁻¹), hierarchically porous structure, the synergistic effect of the B, N co-doping and high content of ORR active species. Significantly, the B element with electron-deficient property in BN/C can create more charged sites favorite for O₂ adsorption and thus accelerate reaction kinetics in ORR. Furthermore, a rechargeable Zn-air battery device comprising BN/C catalyst and RuO₂ with a liquid electrolyte shows superior performance with an open-circuit potential of ∼1.36 V, a peak power density of ∼115 mW cm⁻², as well as excellent durability (1000 cycles for 14 days of operation). Moreover, a flexible solid-state Zn-air battery containing BN/C catalyst and RuO₂ shows good cycling durability under different bending states, indicating the excellent practicability in wearable devices.en_US
dc.rights© 2020 Elsevier Ltd. All rights reserved.en_US
dc.subjectEngineering::Chemical engineeringen_US
dc.titleB, N-doped ultrathin carbon nanosheet superstructure for high-performance oxygen reduction reaction in rechargeable zinc-air batteryen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen_US
dc.subject.keywordsB, N-doped Carbonen_US
dc.subject.keywordsNanosheet Superstructureen_US
dc.description.acknowledgementThis work was financially supported by National Natural Science Foundation of China (51672193, 51420105002 and 51920105004), Natural Science Foundation of Zhejiang Province (LQ18B030001). Ruopeng Zhao thanks China Scholarship Council(Grant No.201908440514) for the award of a fellowship.en_US
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