Related Experiment Video
Updated: Feb 11, 2026

Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries
Published on: May 22, 2018
Transformation of sludge Si to nano-Si/SiOx structure by oxygen inward diffusion as precursor for high performance
Qiqi Hua1, Dongyang Dai1, Chengzhi Zhang1
1College of Materials Science and Engineering, Hunan University, Changsha, 410082, Hunan, China.
Abstract:
Although several Si/C composite structures have been proposed for high-performance lithium-ion batteries (LIBs), they have still suffered from expensive and complex processes of nano-Si production. Herein, a simple, controllable oxygen inward diffusion was utilized to transform Si sludge obtained from the photovoltaic (PV) industry into the nano-Si/SiOx structure as a result of the high diffusion efficiency of O inside Si and high surface area of the sludge. After further process, a yolk/shell Si/C structure was obtained as an anode material for LIBs. This composite demonstrated an excellent cycling stability, with a high reversible capacity (∼ 1250 mAh/g for 500 cycles), by void space originally left by the SiOx accommodate inner Si expansion. We believe this is a rather simple way to convert the waste Si into a valuable nano-Si for LIB applications.
Related Concept Videos
Batteries and Fuel Cells
Lewis Structures of Molecular Compounds and Polyatomic Ions
Diffusion
Ion Channels
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
Trends in Lattice Energy: Ion Size and Charge
Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...

