Kumar Deivasigamani Ranjith, Kanagaraj Inthumathi, Sukanya Ramaraj, Karthik Raj, Hasan Mahmudul, Thalji Mohammad R, Dhakal Ganesh, Milton Ahamed, Prakash Annigere S, Shim Jae-Jin
School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea.
Centre for Organic and Nanohybrid Electronics, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland.
ACS Appl Mater Interfaces. 2024 Jul 3;16(26):33294-33306. doi: 10.1021/acsami.4c00835. Epub 2024 Apr 26.
Zinc-ion batteries (ZIBs) are promising candidates for safe energy storage applications. However, undesirable parasitic reactions such as dendrite growth, gas evaluation, anode corrosion, and structural damage to the cathode under an acidic microenvironment severely affected cell performance. To resolve these issues, an MXene entrapped in an ionic liquid semi-solid gel polymer electrolyte (GPE) composite was explored. The molecular-level mixing of poly(vinylidene fluoride--hexafluoropropylene) (PVHF), zinc trifluoromethanesulfonate (Zn(OTF)), 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF) ionic liquid, and TiCT MXene provided a controlled Zn shuttle toward the anode/cathode. TiCT/EMIBF/Zn(OTF)/PVHF exhibited a breaking strength of 0.36 MPa with an associated extension of 23%. The Zn//TiCT/EMIBF/Zn(OTF)/PVHF//Zn symmetric cell with continuous zinc plating/stripping exhibited excellent Zn ion mobility toward the anode and cathode without undesired reactions. This was confirmed by post-mortem analysis after a symmetric cell compatibility test. The as-prepared GPE with a NaV(PO) (NVP) cathode exhibited a high chemical diffusion coefficient of 1.14 × 10. It also showed an outstanding reversible capacity of 89 mAh g at C/10 with an average discharge plateau voltage of 1.45 V, cycle durability, and controlled self-discharge. These results suggested that the Zn ions in the TiCT/EMIBF/Zn(OTF)/PVHF composite are reversibly labile in the anode and cathode directions.
锌离子电池（ZIBs）是安全储能应用中很有前景的候选者。然而，诸如枝晶生长、气体析出、阳极腐蚀以及在酸性微环境下阴极的结构损伤等不良寄生反应严重影响了电池性能。为了解决这些问题，人们探索了一种包裹在离子液体半固态凝胶聚合物电解质（GPE）复合材料中的MXene。聚（偏二氟乙烯 - 六氟丙烯）（PVHF）、三氟甲磺酸锌（Zn(OTF)）、1 - 乙基 - 3 - 甲基咪唑四氟硼酸盐（EMIBF）离子液体和TiCT MXene的分子级混合提供了一种可控的锌穿梭，使其向阳极/阴极移动。TiCT/EMIBF/Zn(OTF)/PVHF的断裂强度为0.36 MPa，相关延伸率为23%。具有连续锌电镀/剥离的Zn//TiCT/EMIBF/Zn(OTF)/PVHF//Zn对称电池在阳极和阴极方向上表现出优异的锌离子迁移率，且没有不期望的反应。这在对称电池兼容性测试后的尸检分析中得到了证实。所制备的含有NaV(PO)（NVP）阴极的GPE表现出1.14×10的高化学扩散系数。它在C/10下还显示出89 mAh g的出色可逆容量，平均放电平台电压为1.45 V，具有循环耐久性和可控的自放电。这些结果表明，TiCT/EMIBF/Zn(OTF)/PVHF复合材料中的锌离子在阳极和阴极方向上是可逆不稳定的。
