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Lithium-sulfur batteries, University of Michigan guarantees life of 1,000 cycles

Lithium-sulfur batteries, University of Michigan guarantees life of 1,000 cycles

Creating a battery is very important Electric cars in advance. We know how much companies associated with the automobile sector invest in this sector. Thanks to this work, current lithium accumulators have achieved good performance. Apparently, research is ongoing and new solutions are constantly being tested that can move batteries forward, which will significantly improve the autonomy of vehicles and support the proliferation of electric cars.

Very interesting technology Lithium-sulfur batteries (Li-S). Not to mention the fact that on paper, in fact, sulfur is an easily detectable substance, it promises to significantly improve the autonomy of cars. Therefore, these concentrators may be cheaper than current ones. However, lithium-sulfur batteries have a problem They can easily decompose.

The most common cause of reduced life cycles in lithium-sulfur batteries formation of dendrites Significantly shortening the life of cells. Another problem is commonly called “Efetto spacecraft“This leads to continuous loss of active material from the electrode, thus shortening the life of the cell. Lithium polysulfides migrate from the cathode to the positive electrode and then repeat this reaction in a chain, thus reducing the life of the cells.

Professor at the head of the committee Nicholas Kodov of the University of Michigan It seems that a good solution has been found to solve the problems of this battery technology. Kotov points out that there are many reports that talk about lithium-sulfur batteries capable of withstanding hundreds of charge / discharge cycles at a cost, however, the most important parameters being efficiency, charging speed and safety.

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Therefore, researchers have developed New separator for cells called np-ANF It uses aramid nanofibers Lithium inhibits polysulfides Let the lithium ions pass through instead. That being said, under real conditions, lithium-sulfur cells produced with this technology can last up to about 1,000 charge / discharge cycles, equivalent to 10 years of life.