A5070248413- Advanced battery technologies research
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Advanced Battery Technologies Research
- Perovskite Materials and Applications
- Electrocatalysts for Energy Conversion
- X-ray Diffraction in Crystallography
- Crystallography and molecular interactions
- Crystallization and Solubility Studies
- Transition Metal Oxide Nanomaterials
- Advancements in Battery Materials
- Conducting polymers and applications
- Polyoxometalates: Synthesis and Applications
- Electrochemical Analysis and Applications
Northeastern University
2018-2024
Universidad del Noreste
2019-2022
Shenyang University
2019
Abstract Rechargeable aqueous zinc batteries are promising energy‐storage systems for grid applications. Highly conductive polyaniline (PANI) is a potential cathode, but it tends to deactivate in electrolytes with low acidity (i.e. pH >1) owing deprotonation of the polymer. In this study, we synthesized sulfo‐self‐doped PANI electrode by facile electrochemical copolymerization process. The −SO 3 − self‐dopant functions as an internal proton reservoir ensure highly acidic local environment...
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...
VOPO4 ⋅x H2 O has been proposed as a cathode for rechargeable aqueous zinc batteries. However, it undergoes significant voltage decay in conventional Zn(OTf)2 electrolyte. Investigations show the decomposition of into VOx electrolyte and drops after losing inductive effect from polyanions.PO43- was thus added to shift equilibrium. A high concentration cheap, highly soluble ZnCl2 salt further prevents dissolution. The shows stable capacity retentions 13 m /0.8 H3 PO4 electrolyte, direct...
A dual mediator is introduced in aqueous Zn–S batteries to regulate the reaction paths of S cathodes and enhance their electrochemical performance.
The degradation or dendrite formation of zinc metal electrodes has shown to limit the cycle life rechargeable aqueous batteries, and a few anode protection methods are proposed. We herein demonstrate that, except for external protections, simple design an electrolyte can effectively promote stable facile Zn stripping/plating from/on electrodes. By using Zn(ClO4)2 in electrolyte, reversible is achieved over 3000 h at 1 mA cm–2 current density capacity, superior conventional ZnSO4 electrolyte....
Abstract Rechargeable aqueous zinc batteries are promising energy‐storage systems for grid applications. Highly conductive polyaniline (PANI) is a potential cathode, but it tends to deactivate in electrolytes with low acidity (i.e. pH >1) owing deprotonation of the polymer. In this study, we synthesized sulfo‐self‐doped PANI electrode by facile electrochemical copolymerization process. The −SO 3 − self‐dopant functions as an internal proton reservoir ensure highly acidic local environment...
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,...
An <italic>in situ</italic> electrochemical deposition method is demonstrated as an efficient strategy to build high-quality vanadium oxide heterostructures with enhanced performance.
Aqueous rechargeable Zn-manganese dioxide (Zn-MnO2) hybrid batteries based on dissolution-deposition mechanisms exhibit ultrahigh capacities and energy densities due to the two-electron transformation between MnO2/Mn2+. However, reported Zn-MnO2 usually use strongly acidic and/or alkaline electrolytes, which may lead environmental hazards corrosion issues of Zn anodes. Herein, we propose a new battery by adding Al3+ into sulfate-based electrolyte. The undergoes reversible MnO2/Mn2+ exhibits...
Aqueous zinc batteries are expected to be applicable for large-scale energy storage. The polyanion cathode materials provide high voltage, but they experience fast voltage fade in the aqueous system. Herein, we uncover electrolyte-depending degradation mechanisms and propose corresponding solutions with a representative layered hydrated VOPO4 (VOP) material. of VOP 10 m ZnCl2 electrolyte is caused by transition VOx, which loses inductive effect from phosphate. With further suppressed water...
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...
Abstract VOPO 4 ⋅x H 2 O has been proposed as a cathode for rechargeable aqueous zinc batteries. However, it undergoes significant voltage decay in conventional Zn(OTf) electrolyte. Investigations show the decomposition of into VO x electrolyte and drops after losing inductive effect from polyanions.PO 3− was thus added to shift equilibrium. A high concentration cheap, highly soluble ZnCl salt further prevents dissolution. The shows stable capacity retentions 13 m /0.8 3 PO electrolyte,...