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Ultrathin Zn-free anode based on Ti_(3)C_(2)T_(x) and nanocellulose enabling high-durability aqueous hybrid Zn-Na battery with Zn2+/Na+co-intercalation mechanism

查看全文 作　　者：Hao [1]Chen;Weijun [1]Zhou;Minfeng [1]Chen;Qinghua [2]Tian;Xiang [1,3]Han;Jizhang [1,3]Chen 高影响力作者 机构地区：[1]College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China;[2]Key Laboratory of Surface&Interface Science of Polymer Materials of Zhejiang Province,Department of Chemistry,Zhejiang Sci-Tech University,Hangzhou 310018,China;[3]Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing 210037,China高影响力机构 出　　处：《Nano Research》索引2023年第16卷第1期,共9页高影响力期刊 基　　金：We acknowledge the financial support from the National Natural Science Foundation of China(No.51902165);the Program of High-Level Talents in Six Industries of Jiangsu Province(No.XCL-040);the Jiangsu Specially-Appointed Professor Program. 摘　　要：With low cost and high safety,aqueous zinc-based batteries have received considerable interest.Nevertheless,the excess utilization of zinc metal in the anodes of these batteries reduces energy density and increases costs.Herein,an ultrathin electrode of approximately 6.2μm thick is constructed by coating Ti_(3)C_(2)T_(x)/nanocellulose hybrid onto a stainless steel foil.This electrode is used as the Zn-free anode for aqueous hybrid Zn-Na battery,in which,a concentrated electrolyte is used to improve electrochemical reversibility.The Ti_(3)C_(2)T_(x)/nanocellulose coating is found to improve the electrolyte wettability,facilitate desolvation process of hydrated Zn^(2+) ions,lower nucleation overpotential,improve zinc plating kinetics,guide horizontal zinc plating along the Zn(002)facet,and inhibit parasitic side reactions.It is also found that the Na_(3)V_(2)(PO_(4))_(3) cathode material adopts a highly reversible Zn^(2+)/Na^(+)co-intercalation charge storage mechanism in this system.Thanks to these benefits,the assembled hybrid Zn-Na battery exhibits excellent rate capability,superior cyclability,and good anti-freezing ability.This work provides a new concept of electrode design for electrochemical energy storage. 关 键 词：MXene-based composites ultrathin electrodes electrode surface coatings aqueous hybrid batteries co-intercalation charge storage mechanisms
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