Abstract ▼ AI-Helper

With increasing demand of high-performance energy source suitable for multi-functional portable electronic devices and transportation systems, however, the development of new active materials with utmost energy density is highly accelerated. Si is one of the most promising options to substitute for ...

With increasing demand of high-performance energy source suitable for multi-functional portable electronic devices and transportation systems, however, the development of new active materials with utmost energy density is highly accelerated. Si is one of the most promising options to substitute for the carbonaceous anode materials due to its exceptional capability for alloying with lithium and the resulting large theoretical specific capacity.

The electrochemical deposition process is considered as a quite facile and useful preparation technique for producing electrode materials. In particular, it offers a simple way to make thin films with a variety of macroscopic structures ranged from fairly dense to porous. Si can be electrochemically deposited in non-aqueous solvents and under the inert atmosphere due to its considerably negative reduction potential and high reactivity with water. Although a couple of research groups have reported the fabrication of Si-based electro-deposits, main factors affecting film morphology, composition, and impurity have not been clearly understood and their possible applications to anode materials in rechargeable lithium battery has not been discussed.

In this work, the Si film electrodes for high capacity lithium battery are well prepared by electrochemical deposition in organic solvent. Because the deposit oxidized rapidly on contact with the atmosphere, we attempt to prevent the oxidation on the surface of deposit and analyze the compounds below the surface from depth profile studies.

Also its electrochemical properties for anode material of advanced lithium batteries are characterized by specific capacity, cycling stability and measure cyclic vomltammograms.

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