journal article·2022-12-09

Simultaneous Dangling Bond and Zincophilic Site Engineering of SiNx Protective Coatings toward Stable Zinc Anodes

Jiaxian Zheng, Guoyin Zhu, Xin Liu, Hongxing Xie, Yangduo Lin, Ye Zeng, Yizhou Zhang, Appala Naidu Gandi, Zhengbing Qi, Zhoucheng Wang, Hanfeng Liang

ACS Energy Letters· Volume 7· Issue 12
Publisher page

Abstract

Metallic Zn is an appealing anode for aqueous Zn-ion batteries, but it suffers from corrosion and Zn dendrites. In this work, we develop a nonstoichiometric silicon nitride (SiNx) film with specific defect sites, i.e., Si dangling bonds (Si DBs), to modify the surface property and thus to enhance the stability of Zn anodes. The Si DBs, together with zincophilic N sites with strong Zn affinity, are able to uniformly distribute Zn2+ ions on the anodes, enabling an even Zn deposition. Meanwhile, the electrochemically inert SiNx films can also suppress the side reactions to achieve a high Coulombic efficiency. As a result, the SiNx@Zn symmetrical battery possesses a long lifespan of more than 4600 h at 1 mA cm–2. Our work highlights the importance of defect engineering of protective layers in inhibiting the uncontrollable growth of Zn dendrites for constructing high-performance Zn anodes.
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Research context

OpenAlex topics: Advanced battery technologies research · Advanced Battery Materials and Technologies · Advancements in Battery Materials

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Affiliations

State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China

School of Chemistry and Materials Science, Institute of Advanced Materials and Flexible Electronics (IAMFE), Nanjing University of Information Science and Technology, Nanjing, 210044, People’s Republic of China

Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Jodhpur, Jodhpur 342030, Rajasthan, India

Key Laboratory of Functional Materials and Applications of Fujian Province, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, People’s Republic of China

Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361005, People’s Republic of China

Funding

National Natural Science Foundation of China · Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province

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