3D Nickel Scaffolded MoS₂ Nanoflakes as Sodium Battery Anode with Improved Cycling Life and Rate Capability

Abstract

We report the design and fabrication of 3D nickel inverse opals scaffolded MoS2 nanoflakes (MoS2@Ni IO) by a combination of colloid spheres template, electrochemical deposition, and hydrothermal growth routes. The MoS2@Ni IO is further evaluated as sodium ion battery anode, which exhibits a high specific capacity (696.9 mAh/g of the second cycle), long cycling life stability (620.1 mAh/g after 200 cycles at 200 mA/g) and excellent rate capability. The excellent electrochemical performance of the electrode can be attributed to the unique 3D electrode design, in which the 3D ordered Ni scaffold shortens the ion diffusion paths, improves the electronic conductivity and mechanical stability, while the ultrathin MoS2 nanoflakes are involving in the Na+ insertion/extraction.

Template‐Free Synthesis of Hierarchical Composite Nanotubes with Superior Lithium and Sodium Storage Performance

“…Molybdenum disulfide (MoS 2 ) is a graphite‐like inorganic compound, in which one layer of Mo atoms is covalently bonded to two layers of S atoms, and the S–Mo–S structure layer is superimposed by weak van der Waals forces . Because of its lamellar structure and large interlayer spacing, MoS 2 has received much attention in many fields such as catalysis, sensing, transistors, and LIBs/SIBs in the past few decades. However, the complex preparation process, the poor electrical conductivity, as well as the excessive structural changes in the cycle still restrict its further commercial application.…”

Space‐Confined Fabrication of MoS2@Carbon Tubes with Semienclosed Architecture Achieving Superior Cycling Capability for Sodium Ion Storage

“…[28][29][30][31] For enhancing the stability and integrity of MoS 2 -based electrodes, encapsulating MoS 2 in hollow carbon architectures is a feasible approach. [32][33][34] Such kinds of enclosed or semienclosed architectures can not only alleviate the aggregation or exfoliation of MoS 2 effectively, but also provide enough space for buffering volume expansion and more access for charge diffusion. Nowadays, the related study is just beginning, and more attempts are required.…”