Hierarchically Porous FeP Nanospindles Wrapped with Nitrogen–Phosphorus-Codoped Carbon for Enhanced Lithium Storage Performance

Abstract

The hierarchically porous iron phosphide nanospindles with nitrogen–phosphorus-codoped carbon coatings (FeP@NPC) are fabricated via a combination of hydrothermal synthesis and subsequent phosphating treatment, which is extensively researched for elevating the outstanding performance of lithium-ion batteries (LIBs). The as-prepared FeP@NPC nanocomposite manifests a distinguished specific capacity of 1100 mA h g–1 after 200 cycles at 0.2 A g–1, a ranking rate performance with a high capacity of ∼600 mA h g–1 at 5 A g–1, and a reversible long cycling capacity of 951.7 mA h g–1 after 800 cycles at 1 A g–1. The superior properties can be ascribed to the joint contribution of the well-designed porous nanostructure and conductive N, P-codoped carbon coating, which simultaneously facilitates efficient transmission of lithium ions and electrons, contributes to mild volume expansion, and elevates structural stability during the reversible charge–discharge process.

Sn0.1-Li4Ti5O12/C as a promising cathode material with a large capacity and high rate performance for Mg–Li hybrid batteries

“…[1][2][3][4][5] However, Li resources are limited, and the actual energy density of Li-ion batteries is approaching the technological limit, making the development prospects of traditional Li-ion batteries indistinct. [6][7][8][9][10] Mg is considered one of the options for the generation of energy storage technologies because of its abundance, low price, dendrite-free nature, and higher theoretical volumespecific capacity (3833 mA h cm −3 ) than that of Li (2046 mA h cm −3 ). [11][12][13] However, Mg 2+ has two positive charges, which creates an intense coulombic force between Mg 2+ and the cathode material, resulting in the slow diffusion of Mg 2+ in the cathode material and easy polarization.…”

“…1–5 However, Li resources are limited, and the actual energy density of Li-ion batteries is approaching the technological limit, making the development prospects of traditional Li-ion batteries indistinct. 6–10…”

Novel Ni–Ge–P anodes for lithium-ion batteries with enhanced reversibility and reduced redox potential

“…[5][6][7] Therefore, designing novel electrode materials, especially anode materials, with superior electrochemical performance to replace the capacity-limited graphite and Li 4 Ti 5 O 12 anodes is significant. [8][9][10] Among various anode materials, transitionmetal phosphides (M x P y ), such as Ni 2−x Co x P, 11 FeP, 12,13 MnP 4 , 14 VP 2 , 15 TiP 2 , etc., 16 have been extensively studied due to their great phase diversity, large theoretical specific capacities, and high electronic conductivity. 17,18 However, these M x P y anodes also face challenges, such as large volume expansions, sluggish Li diffusion kinetics, and poor reversibility, which inevitably hinder their practical applications.…”