About this Research Topic
The development of high-performance electric vehicles (EVs) with an extended range has motivated tremendous efforts to new battery technologies that can offer high energy density. Reversible ion intercalation and alloying anode materials for energy storage are the cornerstones of high-performance rocking-chair type batteries. Typically, the graphite-based insertion materials and the silicon-based alloying materials have been extensively utilized as anodes for rechargeable commercialized batteries. In the pursuit of energy storage with higher energy densities and longer cycling life, development of new ion or hybrid multi-valence ions insertion anode materials with large insertion capacity, and new stable alloying anodes with suppression of volume change as well as aggregation are of great significance.
Firstly, although graphite may also host Li or K to generate a stage-I structure, the intercalation of Na+ into graphite is difficult, and the generation of a stage-I structure is inaccessible. This has hampered severely the commercial application of sodium-ion batteries. New solvated ion cointercalation chemistry towards Na+ inserted graphite with a high capacity and without exfoliation is a great challenge.
Secondly, electrolyte additives and new electrolyte design are very important to build up the solid electrolyte interface (SEI) for enhanced solid-liquid interfacial compatibility and cycling stability. Besides, some electrolyte additives can play a role as redox mediators or change the solvent properties. Development of new electrolyte or electrolyte additives is also very important for intercalation and alloying electrode reactions.
Therefore, the aim of this Research Topic is to provide a forum for scientists with different research backgrounds to discuss and develop new insertion/alloying anode materials with larger capacity or better cycling stability for state-of-art and next-generation energy-storage technologies including lithium metal batteries; Si, Sb, Sn, Ge, Bi, P based alloyed anodes; sodium-ion, potassium-ion, magnesium, zinc and aluminium anode materials. The highlight to understand in this topic includes but not limited to:
• New intercalation chemistries for anode materials of rechargeable metal-ion batteries
• Multi-valence insertion anode materials with suppression of stress
• New alloying chemistries including composite and structure engineering for high-performance anode materials
• New electrolyte design including additives and SEI engineering for stable anodes
• Kinetics and mechanisms for interface/surface reaction and conversion
• Characterization at the atomic level for interfacial/phase /morphology evolution
• Calculation or simulation to predict and design new insertion/alloying anode materials
Keywords: Energy Storage, Intercalation, Alloy, Conversion, Interstitial, Interfacial and Surface Chemistry
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