A5101418219- Advanced battery technologies research
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Electrocatalysts for Energy Conversion
- Perovskite Materials and Applications
- Membrane-based Ion Separation Techniques
- Catalytic Processes in Materials Science
Northeastern University
2021-2023
Universidad del Noreste
2021
Qingdao University of Science and Technology
2019
Chimie Biologique pour le Vivant
2019
Abstract Rechargeable aqueous zinc-organic batteries are promising energy storage systems with low-cost electrolyte and zinc metal anode. The electrochemical properties can be systematically adjusted molecular design on organic cathode materials. Herein, we use a symmetric small molecule quinone cathode, tetraamino-p-benzoquinone (TABQ), desirable functional groups to protonate accomplish dominated proton insertion from weakly acidic electrolyte. hydrogen bonding network formed carbonyl...
MnO2 cathodes typically undergo one-electron transfer in aqueous zinc batteries. The two-electron MnO2/Mn2+ reaction provides double capacity and higher voltage. However, this requires a highly acidic environment, which challenges the Zn metal anode. Herein, we present proton reservoir for reaction. Zinc hydrophosphate is codeposited with at cathode. former deprotonates to release protons enhances reduction of Mn2+. resulting phosphate further interacts realizes spontaneous water desorption...
MnO2 is a promising cathode for aqueous Zn batteries. However, the cycling stability seriously hindered by active material dissolution, and pre-addition of Mn2+ salts in electrolytes widely required. Herein, we propose structural engineering strategy to enhance capacity contribution from reversible two-electron transfer reaction MnO2/Mn2+ realize stable Mn2+-free electrolytes. By compositing with MoO3, exhibits weakened Mn-O bonds, more oxygen vacancies, spontaneous generation water, thus...
Porous β-Ni(OH)<sub>2</sub> nanosheets with ultrathin thickness are prepared through a microwave-assisted synthesis strategy and used as platform to promote the electrocatalytic urea oxidation reaction.
Abstract Manganese oxide is a promising cathode material for rechargeable aqueous zinc batteries. However, the cycling stability seriously limited by Mn dissolution. Herein, negatively charged porous carbon host proposed manganese to ensure stable cycling. It derived from metal–organic framework with Zn and centers. The organic ligands transform into upon calcination, vaporizes generate surface. provides abundant reaction sites, electron transport network, most importantly, strong...
Covalent organic frameworks (COFs) are promising cathode candidates with high structural stability. However, they contain redox inactive linkages and experience low potential. Herein, a full anti-aromatic microporous COF material of TAQ-BQ is designed for aqueous zinc batteries. The conjugation effectively lowers the energy level lowest unoccupied molecular orbital as revealed by theoretical calculations, which corresponds to an elevated Besides, structure contains imino active sites at...
Abstract Primary alkaline aqueous batteries with Zn metal anodes have been commercialized and show great promise for secondary batteries. However, undergoes a solid–liquid–solid reaction among Zn, Zn(OH) 4 2− , ZnO in electrolytes, the insulating formed on surface easily passivates underneath. Herein, complexing agent of Br − is added into KOH electrolyte. oxidized to Zn–Br complexes instead during discharge, former which exhibits higher solubility. Therefore, solid–liquid reaction,...
The corrosion and dendritic growth of the Zn anode limit its electrochemical performance in aqueous batteries. Here, we present an amphoteric betaine additive for 5 m ZnCl2 electrolyte. carboxyl group on forms hydrogen bonds with water reduces activity. molecule also experiences preferential adsorption surface separates interactions between water. Side reactions at electrode are thus inhibited. regulated interface ensures uniform deposition. As a result, electrolyte allows reversible...
Li<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> transforms into a VOPO<sub>4</sub> type structure and delivers high electrochemical activity as well stability with water–acetonitrile zinc electrolyte.
The transformation of polyanion cathodes into oxides in aqueous Zn batteries results voltage decay. Herein, we uncover a dissolution and oxide re-electrodeposition process for this transformation. Accordingly, the is inhibited by reducing water activity electrolyte with hydrogen bond regulator glucose (Glu). In 4 m Zn(OTf)2/5.5 Glu electrolyte, VOPO4·2H2O cathode maintains redox reactions at high 1.6 V/1.5 V stable capacity retention during cycling different rates. It also shows promising...
The Mn2+ dissolution of MnO2 cathode materials causes rapid capacity decay in aqueous zinc batteries. We herein show that the dissolved can be deposited back to with aid a suitable conductive agent. active material is thus retained for energy storage, and this MnO2/Mn2+ redox process also provides capacity. In free ZnSO4 electrolyte, delivers 325 mA h g-1 at 0.1 A g-1, 90.4% retention achieved after 3000 cycles 5 g-1. Our work demonstrates an effective strategy realize stable cycling...