High temperature adaptive/multicomponent crosslinked hydrogel electrolyte zinc ion battery

2022-05-11 0 By

Rechargeable water zinc ion batteries (ZIBs) have been considered as a promising energy storage device because of their high safety and durability.However, the dendrite growth of zinc anode in electrolyte and the freezing of aqueous solvent at low temperature have become the main problems in the practical application of ZIBs.In order to overcome these challenges, a new strategy, multi-component crosslinked hydrogel electrolyte, has been proposed to inhibit zinc dendrites and achieve low temperature adaptation of ZIBs.Thanks to the excellent inhibition of zinc dendrites by polyacrylamide and dimethyl sulphoxide (DMSO), the coulomb efficiency of the symmetrical cell is about 99.5% during the plating/dezinc process of more than 1 300 hours. The assembled whole cell exhibits large specific capacity and high cycle stability of 265.2 mAh G-1.The capacity retention rate was 95.27% after 3 000 cycles.In addition, due to the introduction of additive DMSO, the full battery can operate stably over a wide temperature range of 60 to -40°C.This work provides an inspiring strategy and a new opportunity for the realization of dendrite-free and wide-temperature rechargeable water zinc ion storage systems.Figure 1 a) Schematic diagram of pdZ-H electrolyte synthesis process.B) SEM image of PDZ-H electrolyte.Optical photographs of raw, twisted and strained PDZ-H electrolytes (C) and various patterns (D) of PDZ-H electrolytes.E-i) digital photographs of the PDZ-H electrolyte at different temperatures from 60 to -40 °C.J) Raman spectra of PDZ-H, PZ-H and P-H electrolytes.K) stress-strain curves of pdZ-H, PZ-H and P-H electrolytes.L) Ionic conductivity of PDZ-H electrolyte at different temperatures.Figure 3a) Schematic diagram of zinc galvanization on Zn/Z-AE and Zn/PDZ-H.LCSM images of Zn/Z-AE anode in Zn/Z-AE//Zn/Z-AE symmetrical battery after different cycle times of B) 0, C) 50 and D) 200 h,And Zn/PDZ-H anode in the Zn/PDZ-H//Zn/PDZ-H symmetric battery at e) 0, F) 50 and G) 1350 H, respectively.High-power SEM images of Zn/Z-AE in Zn/Z-AE//Zn/Z-AE symmetrical batteries after different cycle times of H) 0, I) 50 and J) 200 h,And Zn/PDZ-H//Zn/PDZ-H symmetrical battery anode after k) 0, L) 50 and M) 1350 H, respectively.FIG. 5 Electrochemical performance and application of Zn3V2O8//Zn/PDZ-H full battery in a wide temperature range.A) Schematic diagram of PDZ-H electrolyte with environmental adaptability.B) CV curves at different operating temperatures.C) GCD curves at different temperatures from 60 to -40 °C.D) Long-term cycle stability of Zn3V2O8//Zn/PDZ-H full battery.E-h) a photo of a button battery placed in a clear tank filled with ice to power an electronic watch at varying temperatures from 20 to -40°C.I) photographs of tandem battery units placed in an ice bath for lighting fibre model lights and j) to power leds with the “HIT” logo.K) photos of tandem battery units placed in an ice bath filled with a liquid nitrogen-powered electric windmill.FIG. 6 Reaction mechanism of Zn3V2O8//Zn/PDZ-H full battery.Multi-component Crosslinked Hydrogel radial toward Dendrite-Free Aqueous Zn Ion Batteries with HighTemperature Conversion was published in Advanced Functional Materials.Corresponding authors are Prof. Jingxin Zhao and Prof. Bingang Xu of the Hong Kong Polytechnic University and Prof. Yujie Li of Harbin Institute of Technology.Reference: doi.org/10.1002/adfm.202112540