FeO -Based Materials for Electrochemical Energy Storage.

Iron oxides (FeO ), such as FeO and FeO materials, have attracted much attention because of their rich abundance, low cost, and environmental friendliness. However, FeO , which is similar to most transition metal oxides, possesses a poor rate capability and cycling life. Thus, FeO -based materials consisting of FeO , carbon, and metal-based materials have been widely explored. This article mainly discusses FeO -based materials (FeO and FeO) for electrochemical energy storage applications, including supercapacitors and rechargeable batteries (e.g., lithium-ion batteries and sodium-ion batteries). Furthermore, future perspectives and challenges of FeO -based materials for electrochemical energy storage are briefly discussed.