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Organic Positive Materials for Magnesium Batteries: A review.

Magnesium batteries, like lithium-ion batteries, with higher abundance and similar efficiency, have drawn great interest to large-scale applications such as electric vehicles, grid energy storage etc. On the other hand, the use of organic electrode materials allows high energy-performance, metal-free, environmentally friendly, versatile, lightweight, and economic-efficient magnesium storage devices. In particular, the structural diversity and the simple activity of organic molecules make redox properties and hence battery efficiency easy to monitor. While organic magnesium batteries still in their infancy, this field become more and more promising because significant results were reported in this field. To summarize the achievements in studies on organic cathodes for magnesium systems, we discuss the molecular development, and the combination with electrode design provides the basis for controlling the electrochemical properties. Moreover, the techniques to synthesize organic materials with high-yield are mentioned. Finally, potential problems and prospects are explored to further improve organic cathodes.