Heterostructured Bi₂S₃–Bi₂O₃ Nanosheets with a Built-In Electric Field for Improved Sodium Storage

Abstract

Constructing novel heterostructures has great potential in tuning the physical/chemical properties of functional materials for electronics, catalysis, as well as energy conversion and storage. In this work, heterostructured BiS-BiO nanosheets (BS-BO) have been prepared through an easy water-bath approach. The formation of such unique BS-BO heterostructures was achieved through a controllable thioacetamide-directed surfactant-assisted reaction process. BiO sheets and BiS sheets can be also prepared through simply modifying the synthetic recipe. When employed as the sodium-ion battery anode material, the resultant BS-BO displays a reversible capacity of ∼630 mA h g at 100 mA g. In addition, the BS-BO demonstrates improved rate capability and enhanced cycle stability compared to its BiO sheets and BiS sheets counterparts. The improved electrochemical performance can be ascribed to the built-in electric field in the BS-BO heterostructure, which effectively facilitates the charge transport. This work would shed light on the construction of novel heterostructures for high-performance sodium-ion batteries and other energy-related devices.

Realization of Efficient Field Emitter Based on Reduced Graphene Oxide‐Bi2S3 Heterostructures

“…A doublet, due to spin–orbital interaction, observed at 158.55 and 163.88 eV (red line) corresponds to Bi—S bonding with spin–orbital energy splitting of 5.3 eV assigned to Bi 3+ state in Bi 2 S 3 . The second doublet observed at slightly higher energies at 159.45 and 164.90 eV (violet line) asserts the presence of Bi—O bonds possibly due to the interaction of Bi 2 S 3 nanorods with rGO sheets .…”

Sulfur‐Doped Carbon‐Wrapped Heterogeneous Fe3O4/Fe7S8/C Nanoplates as Stable Anode for Lithium‐Ion Batteries

“…The superiority of the heterogeneous Fe 3 O 4 /Fe 7 S 8 /C electrode would be attributed to the formation of stable solid electrolyte interphase layer, which is important to obtain good cycling performances. The construction of heterogeneous phases can improve the diffusion kinetics of lithium ions, thereby, accelerating the lithium insertion/delithiation process . On the other hand, the defects formed during cycling provide more active sites and promote reaction kinetics, which is also helpful for the lithium ions intercalation/deintercalation .…”

“…The construction of heterogeneous phases can improve the diffusion kinetics of lithium ions, thereby, accelerating the lithium insertion/delithiation process. [40][41] On the other hand, the defects formed during cycling provide more active sites and promote reaction kinetics, which is also helpful for the lithium ions intercalation/ deintercalation. [42] Figure 4d shows the rate performance of the as-prepared Fe 3 O 4 /C, Fe 3 O 4 /Fe 7 S 8 /C and Fe 7 S 8 /C nanoplates.…”

Recent Advances in the Rational Design and Synthesis of Two‐Dimensional Materials for Multivalent Ion Batteries

“…Duet o the existence of built-in electric fields, the transport of charges in materials will be effectively promoted. [33] It can be anticipated that the layered structure of 2D materials in heterostruc- tures can still be maintained, which will contributet ot he transport of multivalent cations.…”