The synthesis of two-dimensional (2D) porous carbon materials has attracted much attention due to their widespread applications. In this work, a high-performance Fe/N doped hierarchical porous carbon nanosheets is developed through thermal activation step ...

A dual-layer gradient electrode structure is provided for optimizing power and energy density in batteries. In use, for an electrode of a lithium-based battery, the electrode includes a first layer above an electrically conductive substrate, the first laye...