Organic‐Inorganic Coupling Strategy: Clamp Effect to Capture Mg 2+ for Aqueous Magnesium Ion Capacitor
Year: 2024
Type: article
Abstract: The rapid transport kinetics of divalent magnesium ions are crucial for achieving distinguished performance in aqueous magnesium‐ion battery‐based energy storage capacitors. However, the strong electrostatic interaction between Mg 2+ with double charges and the host material significantly restricts Mg 2+ diffusivity. In this study, a new composite material, EDA‐Mn 2 O 3, with double‐energy storage mechanisms comprising an organic phase (ethylenediamine, EDA) and an inorganic phase (manganese sesquioxide) was successfully synthesized via an organic–inorganic coupling strategy. Inorganic‐phase Mn 2 O 3 serves as a scaffold structure, enabling the stable and reversible intercalation/deintercalation of magnesium ions. The organic phase EDA adsorbed onto the surface of Mn 2 O 3 as an elastic matrix, works synergistically with Mn 2 O 3 , and utilizes bidentate chelating ligands to capture Mg 2+ . The robust coordination effect of terminal biprotonic amine in EDA enhances the structural diversity and specific capacity characteristics of the composite material, as further corroborated by density functional theory (DFT) calculations, ex situ XRD, XPS, and Raman spectroscopy. As expected, the EDA‐Mn 2 O 3 composite achieved an outstanding specific discharge capacity of 188.97 mAh/g at 0.1 A/g. Additionally, an aqueous magnesium ion capacitor with EDA‐Mn 2 O 3 serving as the cathode can reach 110.17 Wh/kg, which stands out among the aqueous magnesium ion capacitors that have been reported thus far. The abundant reversible redox sites are ensured by the strategic design concept based on the synergistic structure and composition advantages of organic and inorganic phases. This study aimed to explore the practical application value of organic‐inorganic composite electrodes with double‐energy storage mechanisms.
Language: English
Topic: Aqueous and Flow Batteries
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $5,510
Funders: Australian Government, European Commission, RMIT University, National Natural Science Foundation of China, Ministry of Education of the People's Republic of China, Cooperative Research Centres, Australian Government Department of Industry, Natural Science Foundation of Liaoning Province, Department of Education of Liaoning Province, Liaoning University, National Supercomputing Centre Singapore, Australian Research Council, Centre of Excellence in Future Low-Energy Electronics Technologies, Australian Research Council
Awards: 二维过渡金属硫化物中金属活性位的调控设计及其电催化二氧化碳还原反应研究, Rechargeable lithium carbon dioxide battery - catalyst design to prototype , G2983721056, Engineering vanadium oxide-based cathode for aqueous ammonium ion batteries, G392500250, Monolithic Solar Thermal Photocatalytic Membrane for Hydrogen Production, G5256435596, G5954968258, Sustainable Electrolysis via Functional Hybrids for Ammonia Production, ARC Research Hub for Intelligent Energy Efficiency in Future Protected Cropping, G7664159534, G7765776526, G8449502518, G879169496
OpenAlex ID: W4402012271