研究目的
Investigating the synthesis of hollow/porous-walled SnO2 nanoparticles via nanoscale Kirkendall diffusion effect and their application as anode materials in lithium-ion batteries to enhance electrochemical performance.
研究成果
The synthesis of hollow/porous-walled SnO2 nanoparticles via nanoscale Kirkendall diffusion effect significantly improves the electrochemical performance of lithium-ion batteries, demonstrating superior cycle stability and rate capability.
研究不足
The study is limited to the synthesis and application of SnO2 nanoparticles as anode materials in lithium-ion batteries, focusing on the effects of hollow/porous structures on electrochemical performance.
1：Experimental Design and Method Selection
The study utilized a mechanochemical method for synthesizing tin chalcogenide nanoparticles and a thermal oxidation process to transform them into hollow/porous-walled SnO2 nanoparticles via nanoscale Kirkendall diffusion effect.
2：Sample Selection and Data Sources
Tin chalcogenide nanoparticles (SnS and SnSe) were synthesized from elemental precursors of tin, sulfur, and selenium using a planetary ball-mill machine.
3：List of Experimental Equipment and Materials
Planetary ball-mill machine (Fritsch GmBH, pulverisette 5 classic line), X-ray diffractometry (XRD; Bruker D3 Advance), scanning electron microscopy (SEM; FEI Inspect F50), energy-dispersive X-ray spectroscopy (EDS; EDAX PV97-61850-ME), scanning transmission electron microscope (STEM; FEI Talos F200X).
4：Experimental Procedures and Operational Workflow
The mechanochemical synthesis was followed by thermal oxidation at various temperatures to study the transformation mechanism. Electrochemical properties were evaluated using 2032-type coin cells.
5：Data Analysis Methods
Morphological, crystallographic, and elemental analyses were performed using SEM, XRD, TEM, and EDX. Electrochemical performance was evaluated through galvanostatic charge-discharge processes and cyclic voltammetry.
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