About this Research Topic
In the quest for green alternatives to lithium ion batteries, hybrid metal ion batteries (HMIBs) have been proposed, since they combine the advantages of two different charge carriers in terms of energy density and safety. Further enhancement in the energy density can be achieved with hybrid supercapacitors (HSs) that store the energy via two dissimilar mechanisms (i.e. capacitive and faradaic). Notwithstanding the attractiveness of the HMIBs and HSs as energy storage systems, their performance is still far from the desired. Based on the previous experience on lithium ion batteries, several experimental and theoretical approaches have been undertaken to improve the performance of the HMIBs and HSs, but none of them is sufficient to make a breakthrough.
The effectiveness of both HMIBs and HSs depends critically on the rational selection of electrode and electrolyte materials, as well as the compatibility between them. Therefore, this special issue will focus on hybrid materials and systems for green energy storage. The physicochemical characterization of electrode and electrolyte materials upon cycling is an important step to understand the mechanism of energy storage by both HMIBs and HSs. The computational techniques can unveil the nature of the processes occurring in the devices and the factors they depend on, thus allowing control and tuning of the performance of the existing materials, as well as the modelling of novel ones.
The submission of original research articles, short communications and review articles are encouraged. The Research Topic covers the following themes:
• Hybrid metal ion batteries: electrode materials, aqueous and non-aqueous electrolytes;
• Dual-Ion intercalation reactions for energy storage;
• Hybrid supercapacitors: electrochemical reactions for energy storage;
• Electrode/electrolyte interface in hybrid energy storage systems;
• Hybrid energy storage systems: in-situ, ex-situ and/or post-mortem analysis;
• Modelling of hybrid metal ion batteries: design of electrode and electrolyte materials and simulation of processes they participate in.
Keywords: post-lithium ion batteries, supercapacitors, intercalation, electrode/electrolyte interface, modelling
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