Multifunctional water-organic hybrid electrolyte for rechargeable zinc ions batteries

A Double-Functional Additive Containing Nucleophilic Groups for High-Performance Zn-Ion Batteries

“…Furthermore, the wettability of different electrolytes on the Zn foil was examined by contact angle measurements, since the wettability of the Zn anode will directly influence the uniform flow of Zn 2+ and guide a uniform Zn 2+ plating. , As shown in Figure e, Zn metal exhibits a high contact angle of 79.8° in 1MZS after 30 s. In a contrast, the contact angle of modified electrolytes has an obvious decreasing trend. In detail, the contact angle of 48.7° with 0.01TA-Na/1ZS is significantly smaller than that of other modified electrolytes.…”

“…From a 3D model and corresponding sliced 2D contour map representing electron density statistics (Figure g,h), it is apparent that electrons tend to transfer from tartrate anions to the Zn surface, which implies strong chemisorption between tartrate anions and Zn (002). The highest occupied molecular orbital (HOMO) energy level of tartrate anions (−8.137 eV) is higher that of H 2 O (−8.796 eV), thus be easier for tartrate anions to lose electron when absorbing on Zn surface. , …”

“…Up to now, diverse strategies have been proposed to enhance electrochemical performances and reversibility of AZIBs, including Zn anode modification , and electrolyte system optimization. , Among them, electrolyte optimization has been considered as a simple yet practical solution to stabilize Zn anodes . Generally, electrolyte optimization is mainly divided into “water-in-salt” electrolytes (WISE) and introduction of additives to the original electrolytes. , Designing a highly concentrated WISE (e.g., Zn­(TFSI) 2 /LiTFSI) can break the H-bond network and reduce water activity, thus significantly suppressing the hydrogen evolution and side reactions induced by the activity of water .…”

“…Up to now, diverse strategies have been proposed to enhance electrochemical performances and reversibility of AZIBs, including Zn anode modification 22,23 and electrolyte system optimization. 24,25 Among them, electrolyte optimization has been considered as a simple yet practical solution to stabilize Zn anodes. 26 Generally, electrolyte optimization is mainly divided into "water-in-salt" electrolytes (WISE) and introduction of additives to the original electrolytes.…”

Manipulating OH−‐Mediated Anode‐Cathode Cross‐Communication Toward Long‐Life Aqueous Zinc‐Vanadium Batteries

“…To manifest the superior advantages of the ASO additive, we compare the electrochemical performance of our Zn j 2.5 + 0.2 j NVO cathode to that of recently reported V-based AZIBs. [9,19,23,[32][33][34][35][36] As depicted in Figure 3d & Table S1 in the supporting information, for the sake of minimizing the negative impact brought by the cathode dissolution, the mass loadings of V-based materials for AZIBs assembly in most recently reported literatures are generally set at relatively low values ( � 1-2 mg cm À 2 ) to achieve satisfactory energy storage properties. In our case, the mass loading of NVO attains up to 4 mg cm À 2 and still displays outstanding…”