Embedding Co₂P Nanoparticles in N-Doped Carbon Nanotubes Grown on Porous Carbon Polyhedra for High-Performance Lithium-Ion Batteries

Abstract

Development of high performance anode materials is of critical importance for advanced lithium-ion batteries. Herein, we report a novel 3D hybrid composed of well-dispersed Co 2 P nanoparticles embedded in N-doped carbon nanotubes grown on porous carbon polyhedral (Co 2 P/NCNTFs) as advanced electrode for lithium-ion batteries. The Co 2 P/NCNTF electrode is synthesized with a facile pyrolysis and phosphidation method derived from a cobalt-based zeolitic imidazolate framework. The resultant Co 2 P/NCNTFs hybrid demonstrates superior electrochemical performance in lithium-ion batteries, with a large discharge capacity of 906 mA h g −1 at 100 mA g −1 , excellent rate performance of 508 mA h g −1 at 6.4 A g −1 , high Coulombic efficiency of 99.4% after 300 cycles at 100 mA g −1 , and high cycling performance with a capacity retention of 94.7%, which is among the best obtained results for Co 2 P-based anode materials.

Empowering Metal Phosphides Anode with Catalytic Attribute toward Superior Cyclability for Lithium‐Ion Storage

“…These data imply that the good stability of the N‐C might also help to stabilize the supported Ni 2 P nanoparticles for long‐term cycling, apart from the catalysis of the N‐C material. Remarkably, the cycling life and stability for the Li‐ion storage demonstrated in this work reach the highest record compared with reported state‐of‐the‐art MP‐based anodes (Figure e) . Apart from the catalysis of the N‐C materials, the in situ formation of Ni (Figure S9c, Supporting Information) might also help in the decomposition of Li 3 P suggested by the DFT calculation (Figure S10, Supporting Information).…”

“…d) Long‐term cycling performance of N‐C, Ni 2 P@N‐C, and Ni 2 P electrodes at a current rate of 1 A g −1 . e) The cycle life and stability of this work are compared with other reported works: Ni 2 P⊂pGN, Ni 2 P/G, h‐Ni 2 P, MoP‐C, CoP/NC, (Fe) Ni 2 P/G, CuP 2 /C, Sn 4 P 3 /C, Ni 12 P 5 /CNTs, Ni 2 P/C, Sn 4 P 3 /G, CoP⊂NPPCS, H‐FeP@C@GR, GeP 5 @C‐NF, CuP 2 /C, Co 2 P/NCNTFs, and Ni 2 P/NPC …”

Nanostructured Carbon Based Heterogeneous Electrocatalysts for Oxygen Evolution Reaction in Alkaline Media

“…In addition to the high potentials causing serious stability concern, the OER requires larger overpotential to conquer the reaction energy barrier owing to its four‐electron transfer process . Moreover, the OER is also an important half‐reaction associated with various energy storage technologies, such as rechargeable metal‐air batteries and regenerative fuel cells …”

Integrated System of Solar Cells with Hierarchical NiCo2O4 Battery-Supercapacitor Hybrid Devices for Self-Driving Light-Emitting Diodes

“…Currently, electrochemical energy storage devices cover batteries and supercapacitors primarily [6][7][8][9][10][11][12]. Batteries are really a big family, including conventional lead-acid [13,14], nickel-cadmium [15,16], nickel-metal hydride [17][18][19], and lithium-ion batteries [20][21][22][23][24][25], as well as newly developed batteries such as lithium-sulfur [26][27][28], lithium-air [29][30][31], lithium-CO 2 [32][33][34], sodium/potassium/magnesium/aluminum/zinc ion [35][36][37][38][39][40][41][42][43][44], and aqueous metal ion batteries [45,46]. However, the batteries are unsuitable as energy storage devices in the frequently charge and discharge area, such as solar energy, wind energy, and tidal energy, due to the shortcomings of low cycling performance (usually in the order of hundreds of times) [47,48].…”