标题: A Bioinspired Gradient Hydrogel Electrolyte Network with Optimized Interfacial Chemistry toward Robust Aqueous Zinc-Ion Batteries
作者: Wang, QH (Wang, Qunhao); Huang, J (Huang, Jing); Qi, LH (Qi, Luhe); Li, M (Li, Mei); Wang, SJ (Wang, Sijun); Chen, JQ (Chen, Junqing); Sui, ZY (Sui, Zengyan); Bi, TT (Bi, Tingting); Tang, QC (Tang, Qicai); Yu, L (Yu, Le); Hu, P (Hu, Pei); Zhang, W (Zhang, Wei); Lu, CH (Lu, Canhui); Chen, CJ (Chen, Chaoji)
来源出版物: ACS NANO 卷: 19 期: 29 页: 26770-26781 DOI: 10.1021/acsnano.5c06914 Early Access Date: JUL 2025 Published Date: 2025 JUL 29
摘要: Hydrogel electrolytes are regarded as a promising option for high-performance aqueous zinc-ion batteries (ZIBs), but they frequently fail to balance the reaction kinetics and Zn2+ deposition stability. Inspired by articular cartilage, here we develop a gradient-networked hydrogel electrolyte comprising poly(vinyl alcohol) (PVA), cellulose nanofiber (CNF), and graphene oxide (GO) for ZIBs. The low-network-density PVA/CNF (PC) hydrogel layer (cathode side) with extensive channels and a higher water content ensures the rapid transport of ions, while the interfacial hydrogel layer in contact with the Zn anode exhibits a high-density PVA/CNF/GO (PCG) network with enriched carboxyl and hydroxyl groups, which facilitates the desolvation of Zn2+, decreases the activity of water, and homogenizes the Zn2+ flux. Moreover, the polar oxygen-containing groups in GO endow it with dielectric and electronegative properties, collectively enhancing the Zn2+ transference numbers and ionic conductivity of the hydrogel electrolyte. Benefiting from such a gradient-networked structure and modulated interfacial chemistry, the hydrogel electrolyte can effectively stabilize Zn anodes while simultaneously accelerating reaction kinetics. Consequently, the hydrogel electrolyte enables Zn-symmetric cells to exhibit excellent stability over a duration exceeding 2200 h at 1 mA cm-2, and Zn-MnO2 full cells demonstrate enhanced rate capability and safety under various external damages. Overall, this work provides a reliable nature-inspired design strategy of hydrogel electrolytes toward high-performing ZIBs.
作者关键词: hydrogel electrolyte; cellulose nanofiber; zinc-ion batteries; gradient-networkedstructure; synergistic effect
地址: [Wang, Qunhao; Huang, Jing; Qi, Luhe; Wang, Sijun; Chen, Junqing; Bi, Tingting; Tang, Qicai; Yu, Le; Chen, Chaoji] Wuhan Univ, Hubei Prov Engn Res Ctr Emerging Funct Coating Mat, Sch Resource & Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.
[Wang, Qunhao; Li, Mei; Sui, Zengyan; Zhang, Wei; Lu, Canhui] Sichuan Univ, Polymer Res Inst, Natl Key Lab Adv Polymer Mat, Chengdu 610065, Peoples R China.
[Hu, Pei] Wuhan Univ Technol, Sch Sci, Wuhan 430070, Peoples R China.
通讯作者地址: Chen, CJ (通讯作者)，Wuhan Univ, Hubei Prov Engn Res Ctr Emerging Funct Coating Mat, Sch Resource & Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.
Zhang, W (通讯作者)，Sichuan Univ, Polymer Res Inst, Natl Key Lab Adv Polymer Mat, Chengdu 610065, Peoples R China.
电子邮件地址: [email protected]; [email protected]
影响因子：16
