Fast Energy Storage of SnS₂ Anode Nanoconfined in Hollow Porous Carbon Nanofibers for Lithium‐Ion Batteries

Abstract

The development of conversion‐typed anodes with ultrafast charging and large energy storage is quite challenging due to the sluggish ions/electrons transfer kinetics in bulk materials and fracture of the active materials. Herein, the design of porous carbon nanofibers/SnS2 composite (SnS2@N‐HPCNFs) for high‐rate energy storage, where the ultrathin SnS2 nanosheets are nanoconfined in N‐doped carbon nanofibers with tunable void spaces, is reported. The highly interconnected carbon nanofibers in three‐dimensional (3D) architecture provide a fast electron transfer pathway and alleviate the volume expansion of SnS2, while their hierarchical porous structure facilitates rapid ion diffusion. Specifically, the anode delivers a remarkable specific capacity of 1935.50 mAh g−1 at 0.1 C and excellent rate capability up to 30 C with a specific capacity of 289.60 mAh g−1. Meanwhile, at a high rate of 20 C, the electrode displays a high capacity retention of 84% after 3000 cycles and a long cycle life of 10 000 cycles. This work provides a deep insight into the construction of electrodes with high ionic/electronic conductivity for fast‐charging energy storage devices.

N-Doped Hollow Multichannel Carbon Nanofibers Encased in Fe3C for Lithium-Ion Storage

“…During the initial charging scan, the peak at 0.2 V is attributed to the release of Li + ions from carbon, while the anodic peak at 1.1 V signifies the extraction of Li + ions from the SEI film. From the second scan onward, there is no significant alteration in the area under the curve, indicating that the SEI layer is established during the first cycle, and the microstructure remains unchanged. , …”

An interface engineering strategy of MoS2/perovskite oxide as a bifunctional catalyst to boost overall water splitting

“…7b shows the HER and OER LSV curves of LSC/MoS 2 in 1 M KOH electrolyte. 56–59 It can be found that the HER and OER overpotentials of LSC/MoS 2 are 470 and 346 mV, respectively at 100 mA cm −2 . In order to achieve the current density of 10 mA cm −2 , LSC/MoS 2 ‖LSC/MoS 2 requires a corresponding voltage of 1.48 V, which is lower than that of Pt/C‖RuO 2 (1.58 V) in Fig.…”

Heterostructured Mn–Sn Bimetallic Sulfide Nanocubes Confined in N, S-co-Doped Carbon Framework as High-Performance Anodes for Sodium-Ion Batteries

“…23-0677). 38,39 Besides, no other extra diffraction peaks can be observed, showcasing a high purity of the MSS@NSC and the amorphous nature of the NSC. The surface textures and pore characteristics for the MSS@NSC and MSS are studied through the N 2 sorption measurements.…”