锌阳极氮掺杂多孔碳表面功能层设计及可逆性研究

doi:10.11896/cldb. 23040217

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Abstract Zinc anode has become a key factor limiting the cycling performance of zinc-air batteries due to challenges such as dendrite growth, hydrogen evolution, deformation, and passivation. In this study, carbon materials with abundant mesoporous structures were prepared using quaternary ammonium salts as carbon and nitrogen sources through a hard template method, and they were used as a surface functional layer for the zinc anode (N-MC@Zn). The N-MC@Zn material had a high specific surface area of 590.06 m²·g^-1 and an average pore size of 22 nm. The research showed that constructing a nitrogen-doped porous carbon functional layer on the surface of the zinc anode effectively mitigated the negative effects caused by the aforementioned challenges. In particular, the abundant pores in the porous carbon coating provided a buffer zone for zinc deposition/stripping, greatly accelerating the deposition kinetics and stabilizing the deposition/stripping process of zinc ions, thus alleviating hydrogen evolution corrosion of the zinc anode. Furthermore, the anisotropy within the porous carbon coating prevented the growth of dendrites by avoiding the tip effect. Based on these advantages, N-MC@Zn exhibited excellent discharge and charge stability (140 h, 700 cycles), rate capability (from 0.5C to 10C), and discharge capacity. These results demonstrate that porous carbon materials can serve as high-performance functional layer materials for zinc anodes and provide a new perspective for the design of zinc anode coatings.

Key words： zinc anode mesoporous carbon surface modification zinc dendrite zinc-air batteries

Published: 25 March 2024 Online: 2024-04-07

CLC number:

TM911

Fund:Fundamental Research Funds for the Central Universities (2232022D-18), Shanghai Sailing Program (22YF1400700), National Natural Science Foundation of China (21972017), the ‘Scientific and Technical Innovation Action Plan' Hong Kong, Macao and Taiwan Science & Technology Cooperation Project of Shanghai Science and Technology Committee (19160760600) and Shanghai ‘Science and Technology Innovation Action Plan' Key Funding Project (19JC1410500).

Corresponding Authors: ^*nengnengxu@dhu.edu.cn;qswei@dhu.edu.cn

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	CHEN Jingjian
	XU Nengneng
	LU Tuo
	WEI Qunshan

Cite this article:

CHEN Jingjian,XU Nengneng,LU Tuo, et al. Design and Reversibility Study of Nitrogen-doped Porous Carbon Surface Functional Layer for Zinc Anodes[J]. Materials Reports, 2024, 38(6): 23040217-6.

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https://www.mater-rep.com/EN/10.11896/cldb. 23040217 OR https://www.mater-rep.com/EN/Y2024/V38/I6/23040217

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