To design the lithium battery silicon-based solar power new anode pulverization problem

Silicon is the most important semiconductor materials, but its application range is far more than that. The department of energy's Pacific northwest national laboratory, the researchers designed a novel nanostructures, to a silicon extraordinary strength, which is expected to become the lithium ion battery anode materials, solar power, become the upgrade version of graphite. The researchers report in the natural & middot; Communication published research report, their work is the development of lithium ion battery silicon-based anode a leap, for other types of battery materials design provides a new train of thought.

for a long time, graphite has been a key component of lithium-ion batteries. This kind of carbon conductive and stable, very suitable for charging to fill of lithium ion battery anode. But with the increasing demand for higher energy density batteries, graphite electrode also need to upgrade, and silicon is considered to be a good upgrade version of the material. Compared with graphite, silicon absorbs more lithium, but the problem is that the silicon in lithium will significantly expand, may lead to lithium battery anode burst pulverization.

in order to overcome the problem of silicon-based anode pulverization, Pacific northwest national laboratory researchers have devised a novel nanostructures. They will fine silicon particles gathered in microspheres about 8 microns in diameter, form a hierarchical structure of porous silicon roughly the size of red blood cells. This kind of structure is like a sponge, solar net, internal space to absorb the expansion pressure. Research has shown that this kind of hierarchical porous structure have excellent electrochemical performance, mechanical strength and structural integrity, can be used for high performance lithium ion battery anode, it can accommodate charge is typical of graphite anode twice.

, the researchers said they designed nano structure not only can meet the performance requirements for silicon anode in all aspects, also applies to standard industrial processing procedures, including rolling, can provide the new train of thought for other types of battery materials design. Next, solar photovoltaic (pv) network, they will try to develop more scalability and efficiency of manufacturing methods silica microspheres, China solar energy network, for commercial applications, ultimately help to improve the electric car, electronic equipment and other equipment in the performance of lithium ion batteries.

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