New electrode increases battery capacity and can be charged quickly

Electric vehicles and other mobile devices can use fast-charging batteries to store large amounts of energy in a small space. According to foreign media reports, the Clarkson University research team plans to design electrodes for this battery. They used new synthesis techniques to make electrodes made of nano-selenium-carbon composite materials that have the electrical and mechanical properties required for rechargeable batteries. This is a new example of high energy density battery planning, using selenium-impregnated single carbon as an independent positive electrode for high-capacity lithium and sodium metal batteries. The new battery plan has three advantages: large-capacity energy can be stored in a small space, the battery can be used very quickly, and the battery can be charged very quickly. These are all important elements in the use of mobile batteries such as electric vehicles. At present, the scientific literature focuses on the unit energy of the battery. However, for automobiles and other mobile applications, the first thing you should consider is energy density (energy per unit volume). This research proposes a new battery data planning method that solves this underestimated key factor, which is completely different from the existing advanced technology. Unlike traditional nano-structured porous electrodes with high specific surface area, this work uses the opposite method to create a thin, non-porous single electrode sheet. The film is mechanically self-supporting, and the positive electrode collector may not be required at all, further reducing battery capacity. In automobiles and power grids, selenium metal batteries are becoming a high-energy alternative to traditional ion batteries. Calculated by volume, the positive electrode of the new battery, a thin structure composed of selenium and carbon, has twice the energy of the porous selenium data. Since the selenium carbon electrode maintains a nanostructure inside, its charging speed and battery recyclability (the number of charging times before the electrode is damaged) are both very good. The selenium carbon electrode has a relatively high volume density of 2.37g/cc, and the theoretical charging capacity (volume capacity) reaches 1121mah/cc. Regarding the storage of lithium (Li), the positive electrode supplies a reversible capacity of 1028 mAh/ml, maintaining a capacity of 82% after 300 charge-discharge cycles. The new electrode has an unparalleled capacity and energy density, li-se is 1727Wh/L (commercial lithium battery is 770Wh/L), na-se is 980Wh/L, and the total capacity is about the same. At different charging rates, with the increase of current density, its capacity can be maintained above 60%, which is an ideal choice for high-power battery systems and fast car charging. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: Things to pay attention to when charging lithium batteries