Confined Metal Sulfides Nanoparticles into Porous Carbon Nanosheets with Surface‐Controlled Reactions for Fast and Stable Lithium‐Ion Batteries

Abstract

To achieve high‐performance lithium‐ion batteries (LIBs), the ion diffusion behavior in electrode materials is a challenging issue. Herein, 2D FeS/porous carbon nanosheets (FeS@PCSs) hybrids were successfully prepared by a facile, low‐cost strategy involving metal salt‐assisted chemical vapor deposition (CVD) and in situsulfuration process. The unique 2D structure is conducive to shorten the ion diffusion distance, buffer the volume change of FeS nanoparticles, as well as provide abundant sites for Li+ storage. Benefiting from the unique structure, the FeS@PCSs electrode exhibits high surface reaction contributions. When investigated as an anode for lithium‐ion batteries, the as‐prepared FeS@PCSs electrode exhibits a high reversible capacity (1026.2 mAh g−1 at 0.1 A g−1), excellent rate capability (647.2 mAh g−1 at 5 A g−1 and 561.1 mAh g−1 at 10 A g−1), and outstanding cycling stability (888.7 mAh g−1 at 1.0 A g−1 over 800 cycles). This work provides a cost‐effective and scalable route to synthesis the 2D carbon‐based transition metal compounds as high‐performance LIBs anodes.

Sulfur-Rich Graphene Nanoboxes with Ultra-High Potassiation Capacity at Fast Charge: Storage Mechanisms and Device Performance

“…where k 1 v and k 2 v 1/2 represent the reaction-controlled contribution and the solid-state diffusion-controlled contribution. 112 At a set voltage, a given charge storage mechanism is either reaction controlled or diffusion controlled but not both. However, as the voltage is swept from its maximum to its minimum, the same mechanism may change in its rate limiting step.…”

“…The relative contribution to the total capacity from the reaction-controlled versus the diffusion-controlled ion storage process can be further evaluated according to eq : where k 1 v and k 2 v 1/2 represent the reaction-controlled contribution and the solid-state diffusion-controlled contribution . At a set voltage, a given charge storage mechanism is either reaction controlled or diffusion controlled but not both.…”

Review of Transition Metal Chalcogenides and Halides as Electrode Materials for Thermal Batteries and Secondary Energy Storage Systems

“…These materials maintain a capacity of 782 mAh g −1 at high current densities (up to 10 A g −1 ) and are stable up to 800 cycles for LIBs. 70,71 In the context of sodium ion batteries (SIBs), MoS 2 -like layered materials experience sodium ion intercalation during charging (0.4−3 V) and deintercalation during discharging (below 0.4 V) 59 Na ion intercalation reaction:…”

Salt-assisted synthesis of advanced carbon-based materials for energy-related applications

“…Sun et al 202 provided a salt-assisted chemical vapor deposition accompanied by in situ sulfurization to synthesize 2D FeS@porous carbon nanosheet composites, which demon- strated excellent capacity, high rate performance, and long cycle-life in lithium-ion batteries. Shi et al prepared a FeS@GQDs composite using FeSO 4 and coal tar pitch (CTP) as iron and GQD resource, respectively.…”