Boosted Charge Transfer in SnS/SnO₂ Heterostructures: Toward High Rate Capability for Sodium‐Ion Batteries

Abstract

Constructing heterostructures can endow materials with fascinating performance in high-speed electronics, optoelectronics, and other applications owing to the built-in charge-transfer driving force, which is of benefit to the specific charge-transfer kinetics. Rational design and controllable synthesis of nano-heterostructure anode materials with high-rate performance, however, still remains a great challenge. Herein, ultrafine SnS/SnO2 heterostructures were successfully fabricated and showed enhanced charge-transfer capability. The mobility enhancement is attributed to the interface effect of heterostructures, which induces an electric field within the nanocrystals, giving them much lower ion-diffusion resistance and facilitating interfacial electron transport.

A Ternary Fe1−xS@Porous Carbon Nanowires/Reduced Graphene Oxide Hybrid Film Electrode with Superior Volumetric and Gravimetric Capacities for Flexible Sodium Ion Batteries

“…[3,46] Meanwhile, compared with these samples, the Fe 1−x S@ PCNWs/rGO paper electrode also exhibits higher gravimetric capacities ( Figure S14, Supporting Information). [47,48] The pseudocapacitive contribution of the Fe 1−x S@PCNWs/ rGO paper anode is analyzed in detail to understand its high rate performance. In order to further confirm the rate capability and cycling stability, the long-term cycling performance of the Fe 1−x S@PCNWs/rGO electrode at different current densities is measured.…”

3D Cube‐Maze‐Like Li‐Rich Layered Cathodes Assembled from 2D Porous Nanosheets for Enhanced Cycle Stability and Rate Capability of Lithium‐Ion Batteries

“…Recently, Li-rich cathode materials (LMNCO), x Li 2 MnO 3 ·(1 − x) LiTMO 2 (0 < x < 1, TM = Mn, Ni, Co, etc. [5][6][7][8][9] On the basis of this, extensive efforts have been devoted to develop nanometersized materials and great progresses have been achieved over the past several years, such as construction of nanoplates, [5] nanowires, [10] nanoparticles, [11] and nanorods, [12] which possess a short Li + diffusion pathway thanks to their diminished dimensions. [3] Nevertheless, the sluggish diffusion of electrons and lithium ions within LMNCO results in electrode polarization and inferior rate capability.…”

Electrochemical Reduction of Carbon Dioxide to Methanol on Hierarchical Pd/SnO2 Nanosheets with Abundant Pd–O–Sn Interfaces

“…As shown in Figure S20, XPS peaks at 336.8 eV (Pd 3d 5/2 )a nd 342.4 eV (Pd 3d 3/2 )a re assigned to Pd II . [15] As for Sn in Pd/SnO 2 NSs,the electronic structure is close to that of pure SnO 2 NPs from the EXAFS and XANES spectra ( Figure S22 and S23), but has al ower coordination number than SnO 2 NPs (Table S3). [15] As for Sn in Pd/SnO 2 NSs,the electronic structure is close to that of pure SnO 2 NPs from the EXAFS and XANES spectra ( Figure S22 and S23), but has al ower coordination number than SnO 2 NPs (Table S3).…”