The present disclosure provides an electroactive material for an electrochemical cell that cycles lithium ions. The electroactive material includes a plurality of electroactive particles having an average diameter greater than or equal to about 100 nm to less than or equal to about 50 μm. Each electroactive particle includes a layered anode material defined by a two-dimensional allotrope. The two-dimensional allotrope includes a plurality of atomic layers that include a negative electroactive material selected from the group consisting of: silicon (Si), germanium (Ge), boron (B), and combinations thereof. In certain variations, the layered anode material may be prelithiated. For example, lithium ions may be dispersed between the atomic layers of the two-dimensional allotrope to pre-lithiate the layered anode material.