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Ouyang K, Chen S, Ling W, Cui M, Ma Q, Zhang K, Zhang P, Huang Y. Synergistic Modulation of In-Situ Hybrid Interface Construction and pH Buffering Enabled Ultra-Stable Zinc Anode at High Current Density and Areal Capacity. Angew Chem Int Ed Engl 2023; 62:e202311988. [PMID: 37743256 DOI: 10.1002/anie.202311988] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/20/2023] [Accepted: 09/21/2023] [Indexed: 09/26/2023]
Abstract
In aqueous electrolytes, the uncontrollable interfacial evolution caused by a series of factors such as pH variation and unregulated Zn2+ diffusion would usually result in the rapid failure of metallic Zn anode. Considering the high correlation among various triggers that induce the anode deterioration, a synergistic modulation strategy based on electrolyte modification is developed. Benefitting from the unique pH buffer mechanism of the electrolyte additive and its capability to in situ construct a zincophilic solid interface, this synergistic effect can comprehensively manage the thermodynamic and kinetic properties of Zn anode by inhibiting the pH variation and parasitic side reactions, accelerating de-solvation of hydrated Zn2+ , and regulating the diffusion behavior of Zn2+ to realize uniform Zn deposition. Thus, the modified Zn anode can achieve an impressive lifespan at ultra-high current density and areal capacity, operating stably for 609 and 209 hours at 20 mA cm-2 , 20 mAh cm-2 and 40 mA cm-2 , 20 mAh cm-2 , respectively. Based on this exceptional performance, high loading Zn||NH4 V4 O10 batteries can achieve excellent cycle stability and rate performance. Compared with those previously reported single pH buffer strategies, the synergistic modulation concept is expected to provide a new approach for highly stable Zn anode in aqueous zinc-ion batteries.
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Affiliation(s)
- Kefeng Ouyang
- Sauvage Laboratory for Smart Materials, State Key Laboratory of Advanced Welding and Joining, Shenzhen Key Laboratory of Flexible Printed Electronics Technology, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Sheng Chen
- Key Laboratory of Radiation Physics and Technology of Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, China
| | - Wei Ling
- Sauvage Laboratory for Smart Materials, State Key Laboratory of Advanced Welding and Joining, Shenzhen Key Laboratory of Flexible Printed Electronics Technology, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Mangwei Cui
- Sauvage Laboratory for Smart Materials, State Key Laboratory of Advanced Welding and Joining, Shenzhen Key Laboratory of Flexible Printed Electronics Technology, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Qing Ma
- Education Center of Experiments and Innovation, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Kun Zhang
- Key Laboratory of Radiation Physics and Technology of Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, China
| | - Peixin Zhang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Yan Huang
- Sauvage Laboratory for Smart Materials, State Key Laboratory of Advanced Welding and Joining, Shenzhen Key Laboratory of Flexible Printed Electronics Technology, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
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Zhang SJ, Hao J, Zhu Y, Li H, Lin Z, Qiao SZ. pH-Triggered Molecular Switch Toward Texture-Regulated Zn Anode. Angew Chem Int Ed Engl 2023; 62:e202301570. [PMID: 36850048 DOI: 10.1002/anie.202301570] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 02/26/2023] [Accepted: 02/27/2023] [Indexed: 03/01/2023]
Abstract
Zn electrodes in aqueous media exhibit an unstable Zn/electrolyte interface due to severe parasitic reactions and dendrite formation. Here, a dynamic Zn interface modulation based on the molecular switch strategy is reported by hiring γ-butyrolactone (GBL) in ZnCl2 /H2 O electrolyte. During Zn plating, the increased interfacial alkalinity triggers molecular switch from GBL to γ-hydroxybutyrate (GHB). GHB strongly anchors on Zn surface via triple Zn-O bonding, leading to suppressive hydrogen evolution and texture-regulated Zn morphology. Upon Zn stripping, the fluctuant pH turns the molecular switch reaction off through the cyclization of GHB to GBL. This dynamic molecular switch strategy enables high Zn reversibility with Coulombic efficiency of 99.8 % and Zn||iodine batteries with high-cyclability under high Zn depth of discharge (50 %). This study demonstrates the importance of dynamic modulation for Zn electrode and realizes the reversible molecular switch strategy to enhance its reversibility.
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Affiliation(s)
- Shao-Jian Zhang
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA-5005, Australia
| | - Junnan Hao
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA-5005, Australia
| | - Yilong Zhu
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA-5005, Australia
| | - Huan Li
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA-5005, Australia
| | - Zhan Lin
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Shi-Zhang Qiao
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA-5005, Australia
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