Synthesis and excellent performance of porous Ni ₂ P @C/ CNTs nanocomposite derived from Ni‐MOFs as an anode for lithium‐ion batteries

Abstract

Summary Here, carbon nanotubes (CNTs) growing on the Ni2P@carbon (Ni2P@C/CNTs) was prepared by Ni‐MOFs as a precursor through pyrolysis combined with phosphorization strategy. As lithium‐ion batteries (LIBs) anode, the as‐prepared Ni2P@C/CNTs presented an outstanding initial discharge capacity (652 mA h g−1) and reversible capacity (442 mA h g−1) after 300 cycles at 0.2 A g−1. The capacity still maintained 252 mA h g−1 at the current density of 1 A g−1. The porous carbon and CNTs growing on carbon spheres enhanced the electrochemical conductivity of the sample, restricted the volume and structural deformation of Ni2P during the discharge/charging process, provided more paths for the movements of Li+ ions/electrons and enlarged the area for electrolyte/Ni2P active materials contacting each other. The results demonstrated that the prominent performances of Ni2P@C/CNTs were ascribed to structural design and paved the way to design other transition metal phosphides‐based anode materials with desired electrochemical performance.

Facile Synthesis of Nickel Phosphide @ N-Doped Carbon Nanorods with Exceptional Cycling Stability as Li-Ion and Na-Ion Battery Anode Material

“…The following supporting information can be downloaded at https:// www.mdpi.com/article/10.3390/batteries9050267/s1. S4 for cutoff values); Table S1: Commonly reported synthesis methods for nickel phosphides [12,24,26,28,[51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66]; Table S2: Cycling performance of reported Ni 2 P as LIBs anode material [21,29,44,[67][68][69]; Table S3: Cycling performance of reported Ni 2 P as SIB anode material [13,70,71]; Table S4: Density of active materials in cells yielding maximum specific energy [72]; Table S5: Parameters for maximized energy of active materials.…”

Doping of high‐valence metals and their electrocatalytic oxygen evolution reaction in metal/porous carbon composites

“…The carbon nanostructure formed after high‐temperature carbonization wraps metal ions/metal compounds in it and plays a certain protective role . [22] Therefore, it can increase its corrosion resistance in the electrolyte and thus increase its durability [23] . In addition, the MOFs derivatives formed after carbonization can still maintain the porous structure of the MOFs precursor, which makes the effective contact area between the electrocatalyst and electrolyte remain large.…”

“…[22] Therefore, it can increase its corrosion resistance in the electrolyte and thus increase its durability. [23] In addition, the MOFs derivatives formed after carbonization can still maintain the porous structure of the MOFs precursor, which makes the effective contact area between the electrocatalyst and electrolyte remain large. In the electrocatalytic reaction process, the electrocatalytic reaction efficiency is high because of the higher number of active sites and the faster electron transport speed.…”