What is Germanene

It has become urgently necessary to develop energy storage technologies and materials due to the rising need for advanced sustainable energies. Among the emerging advances in materials chemistry is the research and development of new electrode materials for rechargeable batteries and supercapacitors. To increase their energy density, service life, specific power, charge and/or discharge capacity, and environmental friendliness, electroactive electrode materials with high surface areas and redox-active mediators are essential. Two-dimensional materials such as MXenes, Xenes, phosphorene, silicene, siloxane, stanene, arsenene, plumbene, bismuthene, antimonene, metallenes, metal-organic frameworks (MOFs), and other materials are being investigated to optimize their performance for various implementations of rechargeable batteries and supercapacitors. This chapter discusses recent progress and future challenges in the design of two-dimensional materials for electrodes of electrochemical energy storage devices.