Original 2D Transition Metal Selenides/Borides Devoting to Enhanced Energy Conversion and Storage

Energy conversion and storage devices (ECSD), such as catalysis, rechargeable batteries, and supercapacitors, have triggered numerous attentions over past decades. Particularly, rechargeable batteries, responsible for fast growing intelligent electronic device and electric vehicle, is highly recommended. Till now, extensive efforts have been dedicated into developing advanced batteries with large capacity, high energy and power density, high safety, long cycle life, fast response, and low cost. Lithium ion (Li-ion) battery, with desirable energy density and long cycle span, lays the foundation of existing and future electrochemical energy storage. However, the limited and uneven geographical distribution of lithium resources restricts their further application in large-scale energy storage.