The lithium ions storage behavior of heteroatom-mediated echinus-like porous carbon spheres: From co-doping to multi-atom doping.

摘要: Abstract This study proposed a facile method to prepare echinus-like porous carbon spheres (PCS) with different heteroatom doping for lithium ions battery (LIBs). A metal-organophosphine framework (MOPF) was synthesized by employing riboflavin sodium phosphate as an organic ligand conjugate metal and then carbonized at mild temperature, leading the formation of doped PCS (H-PCS). As result, (N, P) co-, P, Ni) tri-, Co) tri- Ni, Co, tetra-doped were obtained examine insight into lithium-ion storage behavior H-PCS. It found that specific surface area, pore texture structural defects H-PCS dependent on heteroatoms well charge transfer resistance Li-ion diffusion coefficient. Significantly, redox reaction potential during charge/discharge could be mediated upon doping. Thus, when evaluated anode LIBs, exhibited highly reversible capacity 680 mAh g−1 0.1 g−1, excellent rate capability (115.9 1.0 g−1) superior cycling performance (399.6 g−1). Moreover, cyclic voltammogram measurements demonstrated atoms favorable improving capacitive contribution limited diffusion. this work highlighted importance HCP defined which considered one prominent candidates high-performance LIBs’ anode.