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http://hdl.handle.net/1942/41710
Title: | Polyanionic hydrogel electrolyte enables reversible and durable Zn anode for efficient Zn-based energy storage | Authors: | Jin, CJ Yang, CC Mi, HY Ji, CC Guo, FJ Liu, CZ Liu, ZQ YANG, Nianjun |
Issue Date: | 2023 | Publisher: | ELSEVIER | Source: | Journal of Energy Chemistry, 86 , p. 373 -381 | Abstract: | Aqueous Zn-ion energy storage systems, which are expected to be integrated into intelligent electronics as a secure power supply, suffer poor reversibility of Zn anodes, predominantly associated with dendritic growth and side reactions. This study introduces a polyanionic strategy to address these formidable issues by developing a hydrogel electrolyte (PACXHE) with carboxyl groups. Notably, the carboxyl groups within the hydrogel structure establish favorable channels to promote the transport of Zn2+ ions. They also expedite the desolvation of hydrated Zn2+ ions, leading to enhanced deposition kinetics. Additionally, these functional groups confine interfacial planar diffusion and promote preferential deposition along the (002) plane of Zn, enabling a smooth surface texture of the Zn anode. This multifaceted regulation successfully achieves the suppression of Zn dendrites and side reactions, thereby enhancing the electrochemical reversibility and service life during plating/stripping cycles. Therefore, such an electrolyte demonstrates a high average Coulombic efficiency of 97.7% for 500 cycles in the Zn||Cu cell and exceptional cyclability with a duration of 480 hat 1 mA cmz/1 mA h cm-2 in the Zn||Zn cell. Beyond that, the Zn-ion hybrid micro-capacitor employing PACXHE exhibits satisfactory cycling stability, energy density, and practicality for energy storage in flexible, intelligent electronics. The present polyanionic-based hydrogel strategy and the development of PACXHE represent significant advancements in the design of hydrogel electrolytes, paving the way for a more sustainable and efficient future in the energy storage field.(c) 2023 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. | Keywords: | Polyanionic hydrogel electrolyte;Zinc anode issues;Dendrite suppression;Electrochemical performance;Zinc-ion hybrid micro-capacitor | Document URI: | http://hdl.handle.net/1942/41710 | ISSN: | 2095-4956 | e-ISSN: | 2095-4956 | DOI: | 10.1016/j.jechem.2023.08.008 | ISI #: | WOS:001075854300001 | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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File | Description | Size | Format | |
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1-s2.0-S2095495623004461-main.pdf Restricted Access | Published version | 3.61 MB | Adobe PDF | View/Open Request a copy |
Manuscript_JEC.pdf | Peer-reviewed author version | 5.17 MB | Adobe PDF | View/Open |
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