How can we enhance the electrochemical properties of nano-silicon anode material?
All over the world, countries have a great deal of faith in the strategic direction of research which focuses on the development and applying new energy. The performance of the battery is a crucial factor in the progress of the emerging energy sector. There are various kinds of batteries as energy storage elements. One of the most prominent research directions is lithium-ion batteries, which can be utilized to power batteries and as energy storage batteries. There are numerous applications. It is crucial to understand the cycle retention, efficiency rates, capacity, and rate of lithium-ion battery batteries.
Lithium-ion battery components include positive electrodes, negative electrodes separators, electrolytes , and other packaging components. The improvement of lithium-ion battery performance is closely linked to the development of materials that are positive and negative. There are three kinds of cathode substances: lithium iron phosphate and cobalt dioxide. Their capacity for cycling is lower than 200mAh/g. The anode materials that are available include silicon-carbon and graphite. They also have different cycles. It is less than 420mAh/g. This is why it is vital to increase the specific capacity of anode material. Nano-silicon theoretically has a capacity of 4200mAh/g. The low efficiency of its primary function and poor cycle retention are the main factors that limit its application.
The following strategies are used mostly to improve the electrochemical capabilities and efficiency of the silicon-based anode material:
(1) Nano silicon materials:
Nanometerization in the zero-dimension may limit the absolute volume change in silicon. One-dimensional nanometerization decreases change in volume radially during charging and discharging. Two-dimensional nanometerization can reduce the volume change perpendicularly to the film.
(2) Silicon alloy materials:
One type is inert metals (Cu, Fe, Mn, Ti, etc.) They do not react with Li+. Inert metal has excellent conductivity and speeds up the spread of Li+. Additionally, it acts as a buffer while the other can react with lithium. The active metals (Al. Mg. Sn. Sb. etc.).) of the deintercalation reaction, the lithium-intercalation potential platforms of the active metals and silicon are quite different, and the lithium compound generated by the active metal intercalation can be used as a buffer matrix.
(3) Silicon carbon anode material:
The excellent electrical conductivity of nanosilicon materials and the exceptional robustness of carbon materials can be completely utilized by Nano Silicon. The low cycle retention rate of nano silicon anode materials remains one of the main issues that prevent its application. The retention rate of the nano silicon anode material could be enhanced by coating silicon particles with carbon or converting some silicon into silicon carbide. The current use of silicon-carbon anode material shows that silicon anode materials should be utilized with graphite anodes, and the proportion of silicon in anode materials must generally be less than 15 15%.
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