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Chen J, Chen M, Chen H, Yang M, Han X, Ma D, Zhang P, Wong CP. Wood-inspired anisotropic hydrogel electrolyte with large modulus and low tortuosity realizing durable dendrite-free zinc-ion batteries. Proc Natl Acad Sci U S A 2024; 121:e2322944121. [PMID: 38748586 PMCID: PMC11126919 DOI: 10.1073/pnas.2322944121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 04/19/2024] [Indexed: 05/27/2024] Open
Abstract
While aqueous zinc-ion batteries exhibit great potential, their performance is impeded by zinc dendrites. Existing literature has proposed the use of hydrogel electrolytes to ameliorate this issue. Nevertheless, the mechanical attributes of hydrogel electrolytes, particularly their modulus, are suboptimal, primarily ascribed to the substantial water content. This drawback would severely restrict the dendrite-inhibiting efficacy, especially under large mass loadings of active materials. Inspired by the structural characteristics of wood, this study endeavors to fabricate the anisotropic carboxymethyl cellulose hydrogel electrolyte through directional freezing, salting-out effect, and compression reinforcement, aiming to maximize the modulus along the direction perpendicular to the electrode surface. The heightened modulus concurrently serves to suppress the vertical deposition of the intermediate product at the cathode. Meanwhile, the oriented channels with low tortuosity enabled by the anisotropic structure are beneficial to the ionic transport between the anode and cathode. Comparative analysis with an isotropic hydrogel sample reveals a marked enhancement in both modulus and ionic conductivity in the anisotropic hydrogel. This enhancement contributes to significantly improved zinc stripping/plating reversibility and mitigated electrochemical polarization. Additionally, a durable quasi-solid-state Zn//MnO2 battery with noteworthy volumetric energy density is realized. This study offers unique perspectives for designing hydrogel electrolytes and augmenting battery performance.
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Affiliation(s)
- Jizhang Chen
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing210037, China
| | - Minfeng Chen
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing210037, China
| | - Hongli Chen
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai200237, China
| | - Ming Yang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen518060, China
| | - Xiang Han
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing210037, China
| | - Dingtao Ma
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen518060, China
| | - Peixin Zhang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen518060, China
| | - Ching-Ping Wong
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA30332
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Wang Y, Niu S, Gong S, Ju N, Jiang T, Wang Y, Zhang X, Sun Q, Sun HB. Fused Functional Organic Material with the Alternating Conjugation of Quinone-Pyrazine as Cathode for Aqueous Zinc Ion Batteries. SMALL METHODS 2024:e2301301. [PMID: 38185796 DOI: 10.1002/smtd.202301301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/22/2023] [Indexed: 01/09/2024]
Abstract
Organic cathode materials for aqueous rechargeable zinc batteries (ARZBs) are rapidly gaining prominence, while the exploration of compounds with affordable synthesis, satisfactory electrochemical performance, and understandable mechanisms still remains challenging. In this study, 6,8,15,17-tetraaza-heptacene-5,7,9,14,16,18-hexaone (TAHQ) as an easily synthesized organic cathode material with novel quinone/pyrazine alternately conjugated molecule structure is presented. This organic electrode exhibits good capacity with highly reversible redox reactions, and the influence of multi-active structures on the Zn2+ /H+ loading behavior is systematically investigated by ex situ spectroscopy, electrochemical tests, and computation. Both experimental and theoretical studies effectively address the Zn2+ /H+ intercalation/deintercalation kinetics. Benefitting from the fused active functionalities, the assembled Zn//TAHQ battery displays a maximum discharge specific capacity of 254.3 mAh g-1 at 0.5 A g-1 , and it maintains remarkable cycle performance with 71% capacity retention after 1000 cycles under 5 A g-1 .
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Affiliation(s)
- Yao Wang
- Department of Chemistry, Northeastern University, Shenyang, 110819, P. R. China
| | - Suyan Niu
- Department of Chemistry, Northeastern University, Shenyang, 110819, P. R. China
| | - Shanshan Gong
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi, 330013, P. R. China
| | - Na Ju
- Department of Chemistry, Northeastern University, Shenyang, 110819, P. R. China
| | - Tong Jiang
- Department of Chemistry, Northeastern University, Shenyang, 110819, P. R. China
| | - Yiming Wang
- Department of Chemistry, Northeastern University, Shenyang, 110819, P. R. China
| | - Xinyue Zhang
- Department of Chemistry, Northeastern University, Shenyang, 110819, P. R. China
- Foshan (Southern China) Institute for New Materials, Foshan, 528200, P. R. China
| | - Qi Sun
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi, 330013, P. R. China
| | - Hong-Bin Sun
- Department of Chemistry, Northeastern University, Shenyang, 110819, P. R. China
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