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Zhang Y, Li L, Wang F, Wang H, Jiang Z, Lin Z, Bai Z, Jiang Y, Zhang Y, Chen B, Tang Y. Achieving High Initial Coulombic Efficiency and Capacity in a Surface Chemical Grafting Layer of Plateau-type Sodium Titanate. ChemSusChem 2024:e202301598. [PMID: 38264796 DOI: 10.1002/cssc.202301598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 01/14/2024] [Accepted: 01/22/2024] [Indexed: 01/25/2024]
Abstract
The plateau-type sodium titanate with suitable sodiation potential is a promising anode candidate for high safe and high energy density of sodium-ion batteries (SIBs). However, the poor initial Coulombic efficiency (ICE) and cyclic instability of sodium titanate are attributed to the unstable interfacial structure along with the decomposition of electrolytes, resulting in the continuous formation of solid electrolyte interface (SEI) film. To address this issue, a chemical grafting method is developed to fabricate a highly stable interface layer of inert Al2 O3 on the sodium titanate anode, rendering the high ICE and excellent cycling stability. Based on theoretical calculations, NaPF6 are more likely adsorption on the Al2 O3 surface and produce sodium fluoride. The formation of a thin and dense SEI film with rich sodium fluoride achieves the low interfacial resistances and charge-transfer resistances. Benefitting from our design, the obtained sodium titanate exhibits a high ICE from 67.7 % to 79.4 % and an enhanced reversible capacity from 151 mAh g-1 to 181 mAh g-1 at 20 mA g-1 , along with an increase in capacity retention from 56.5 % to 80.6 % after 500 cycles. This work heralds a promising paradigm for rational regulation of interfacial stability to achieve high-performance anodes for SIBs.
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Affiliation(s)
- Yanlei Zhang
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
| | - Linwei Li
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
| | - Feng Wang
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
- Institute of Applied Physics and Materials Engineering, University of Macau, Macau, 999078, China
| | - Huicai Wang
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
| | - Zhenming Jiang
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
| | - Zhimin Lin
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
| | - Zhengshuai Bai
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
| | - Yinzhu Jiang
- School of Materials Science and Engineering, State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
| | - Yanyan Zhang
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
| | - Binmeng Chen
- Institute of Applied Physics and Materials Engineering, University of Macau, Macau, 999078, China
| | - Yuxin Tang
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
- Qingyuan Innovation Laboratory, Quanzhou, 362801, China
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