Submicrospherical and Porous Bi₂S₃ Protected by Nitrogen‐Doped Carbon for Practical Anode Fabrication of Li‐Ion Batteries

Abstract

Research on alloy‐type anode materials with micro/submicrospherical morphology is of great significance for the development of high energy‐density Li‐ion batteries. A facile and cost‐effective route is adopted to prepare homogeneous submicrospherical and porous Bi2S3@nitrogen‐doped carbon (NC) nanocomposites, which exhibit considerably better Li‐storage performance than pure Bi2S3 and Bi2O3 submicrospheres. Analyses on the electrochemical behavior and morphology of the electrode show that the good performance of Bi2S3@NC can be correlated with its stable submicrospherical structure and decreased charge‐transfer resistance, for which the NC coating layer and porous interior of Bi2S3 are supposed to be the two main contributors. The submicrospherical structure and facile synthesis of Bi2S3@NC will be very suitable for practical electrode fabrication technology of Li‐ion batteries.

Bismuth‐based Nanomaterials for Aqueous Alkaline Batteries: Recent Progress and Perspectives

“…[61] However, Bi based electrode materials suffer from unsatisfactory cycling stability and capacity, which hinders their actual application. [62] In this regard, great efforts have been devoted to design nanostructured Bi based electrode materials including Bi, [62] Bi 2 O3, [63] Bi 2 S 3 [64] and BiO 4 Co 3 (OH) 2 [65] exhibit impressive performance.…”

Bi‐Based Electrode Materials for Alkali Metal‐Ion Batteries

“…However, the poor electrical conductivity, huge volume expansion and polysulfides dissolution compromise the cycle performance. To mitigate these difficulties, a series of strategies have been utilized, such as fabricating nanostructured Bi 2 S 3 , [ 118–120 ] forming hybrid composite with conductive matrix [ 57–59,121–131 ] and engineering hollow space, [ 132–135 ] etc.…”

Yolk‐Shell Sb2S3@C Hollow Microspheres with Controllable Interiors for High Space Utilization and Structural Stability of Na‐Storage

“…[20] Theoretically speaking, for the purpose of achieving a high volumetric energy density in practical application, microspheres or micron-scale particles are the most ideal structures because a densely stacked manner for electrode fabrication, namely high space utilization, can be easily realized. [21] Meanwhile, from the viewpoint of electrode structural stability, hollow microspheres/ particles are interesting structures because the hollow void space can buffer the volume expansion/contraction of Sb 2 S 3 from the inside. Nonetheless, it should be noted that simple hollow Sb 2 S 3 structures especially those composed of thin shells undoubtedly will sacrifice the space utilization when the hollow voids are not fully utilized during electrochemical cycling of Sb 2 S 3 .…”