Dispersive NiCoP/LDO heterostructure nanosheets scattered by CNTs enabling high-performance electrochemical energy storage

Towards High-Performance Supercapacitor Electrodes via Achieving 3D Cross-Network and Favorable Surface Chemistry

“…Energy density (E) and power density (P), two key indicators for the practical application of an asymmetric device, can be studied in Ragone plots (Figure f). To our delight, our device achieves a high-energy density of 48.5 Wh kg –1 at 737.1 W kg –1 and remains as high as 25 Wh kg –1 at 7500 W kg –1 , outperforming previously reported Ni–Co–P-based systems, ,,,− including the Ni–Co–P heterostructure (30.2 Wh kg –1 at 891.0 W kg –1 ), Zn–Ni–Co–P (37.6 Wh kg –1 at 856.5 W kg –1 ), NiCoP/NPC (26.8 Wh kg –1 at 7973 W kg –1 ), NiCoP/LDO-CNT (21.3 Wh kg –1 at 748.5 W kg –1 ), Ni 0.5 Co 0.5 P (45.2 Wh kg –1 at 800 W kg –1 ), NiCoP nanocubes (41.3 Wh kg –1 at 373.3 W kg –1 ), CoP@NiCoP (37.2 Wh kg –1 at 875 W kg –1 ), and NiCoP@CoS (35.8 Wh kg –1 at 748.9 W kg –1 ). Furthermore, for a practical device, the energy efficiency at a current density should be described.…”

Metal Phosphides as Promising Electrode Materials for Alkali Metal Ion Batteries and Supercapacitors: A Review

“…NiCophosphide/NiCo-layered double oxide-carbon nanotube (NCP/ LDO-CNT) composite was synthesized, reaching a high specific capacity of 901.2 mAh g −1 and high capacity retention after 200 cycles at 0.2 A g −1 (Table 2). [156]…”

“…[168] Various oxidation states of nickel phosphides have been studied as pseudocapacitive materials: Ni 2 P, [168][169][170][171][172] Ni 12 P 5 , [173,174] and Ni 5 P 4 . [175] The chemical properties of cobalt are [148,[154][155][156][157][158][159] Table 3. Nonexhaustive list of metallic and semiconducting metal phosphides.…”

Hierarchical Co1.4Ni0.6P@C hollow nanoflowers assembled from ultrathin nanosheets as an anode material for high-performance lithium-ion batteries

“…On the one hand, nanostructures can shorten the ion diffusion path, increase the contact area between the electrode and the electrolyte, buffer volume expansion caused by material strain, and improve the reaction kinetics; on the other hand, a composite with carbon matrix can improve the conductivity of the active material, enhance the structural stability, avoid electrode pulverization, and promote cycle stability. 24–27 For example, Qian et al 28 synthesized a nano-sized NiCo-phosphide/NiCo-layered double oxide-carbon nanotube (NCP/LDO-CNT) composite via low-temperature phosphorization of NiCo-LDO-CNT that is derived from nickel-cobalt glycolates-CNT (NiCo-EG-CNT). It exhibits excellent cycle stability as a LIB anode at low current densities.…”