MoSe/BiSe Heterostructure Immobilized in N-Doped Carbon Nanosheets Assembled Flower-Like Microspheres for High-Rate Sodium Storage.

A key challenge for sodium-ion batteries (SIBs) lies in identifying suitable host materials capable of accommodating large Na ions while addressing sluggish chemical kinetics. The unique interfacial effects of heterogeneous structures have emerged as a critical factor in accelerating charge transfer and enhancing reaction kinetics. Herein, MoSe/BiSe composites integrated with N-doped carbon nanosheets are synthesized, which spontaneously self-assemble into flower-like microspheres (MoSe/BiSe@N-C).

TiO -Based Heterostructures with Different Mechanism: A General Synergistic Effect toward High-Performance Sodium Storage.

The general synergistic effect of TiO -based heterostructures has been discovered to improve the sodium storage of anodes, involving conversion, alloying, and insertion mechanism materials. Herein, metal sulfides (MS , M = Sn , Co , Mo ), metallic Sb and Sn, as well as, carbon nanotubes (CNTs) are chosen as the model examples from the three kinds. The electrochemical testing demonstrates a better performance of heterostructrues involving TiO than the pristine anode components.

Systematic Study of Alkali Cations Intercalated Titanium Dioxide Effect on Sodium and Lithium Storage.

The fast development of electrochemical energy storage devices necessitates rational design of the high-performance electrode materials and systematic and deep understanding of the intrinsic energy storage processes. Herein, the preintercalation general strategy of alkali ions (A = Li , Na , K ) into titanium dioxide (A-TO, LTO, NTO, KTO) is proposed to improve the structural stability of anode materials for sodium and lithium storage. The different optimization effects of preintercalated alkali ions on electrochemical properties are studied systematically.

Hierarchical Octahedra Constructed by Cu S/MoS ⊂Carbon Framework with Enhanced Sodium Storage.

Metal sulfides have aroused considerable attention for efficient sodium storage because of their high capacity and decent redox reversibility. However, the poor rate capability and fast capacity decay greatly hinder their practical application in sodium-ion batteries. Herein, a self-template-based strategy is designed to controllably synthesize hierarchical microoctahedra assembled with Cu S/MoS heterojunction nanosheets in the porous carbon framework (Cu S/MoS ⊂PCF) via a facile coprecipitation method coupled with vulcanization treatment.

Boosting Na Storage Ability of Bimetallic Mo W Se with Expanded Interlayers.

In spite of the valuable advancements in the fabrication of transition-metal selenides (TMSs)-based hybrid structures, only single-metal selenides have been obtained through most of the present methods. Herein, a facile room-temperature self-polymerization and subsequent selenization strategy is proposed for the synthesis of bimetallic Mo W Se nanosheets with expanded interlayers decorated with N-doped carbon-matrix assembled flowerlike hierarchical microspheres (Mo W Se /NC). Depending on the excellent coordination ability of dopamine with metal ions, self-formed flowerlike single precursors are harvested.

Metal-Semiconductor Phase Twinned Hierarchical MoS Nanowires with Expanded Interlayers for Sodium-Ion Batteries with Ultralong Cycle Life.

Sodium-ion batteries (SIBs) are considered a prospective candidate for large-scale energy storage due to the merits of abundant sodium resources and low cost. However, a lack of suitable advanced anode materials has hindered further applications. Herein, metal-semiconductor mixed phase twinned hierarchical (MPTH) MoS nanowires with an expanded interlayer (9.

One-Step Construction of MoSSe/N-Doped Carbon Flower-like Hierarchical Microspheres with Enhanced Sodium Storage.

Despite the fulfilling advancement in preparing two-dimensional (2D) layered transition-metal dichalcogenide (TMD)-based hybrid architectures, most methods lie on additional template-based procedures for obtaining the expected structure. Here, we present a self-template and in situ synchronous selenization/vulcanization strategy for the synthesis of flower-like hierarchical MoSSe/N-doped carbon (MoSSe/NC) microspheres by morphology-preserved thermal transformation of a Mo-polydopamine precursor. Introducing element S into the MoSe crystal structure can enhance the electron and ion transportation and lift the ability of MoSe to store Na; the presence of Se can expand the interlayer spacing in contrast to MoS.