Magnesium batteries are the best alternative to lithium batteries?

Choose magnesium batteries instead of lithium batteries? Before we start, let's take a look at how ordinary lithium batteries work. Generally speaking, lithium batteries rely on lithium ions to transport electrons back and forth between the positive and negative electrodes, thereby generating electricity for external electronic devices. When a lithium battery is discharged, lithium ions first combine with electrons in the cathode, and then transfer the load electrons to the anode and unload the cargo, forming a closed loop where current occurs. Similarly, lithium ions will accumulate on the anode after discharge. When a current is applied, the electron-filled lithium ions will be removed from the anode and returned to the cathode in the reverse direction. So when all ions are at high energy, it means that the battery is full. Choose magnesium batteries instead of lithium batteries? The discharge mechanism of rechargeable lithium batteries The process of electrons moving around lithium ions is similar to the process of transporting goods, because the goods to be transported are usually neatly packed in containers, and a large number of electrons constitute the directionality Current. Since lithium ions in lithium batteries usually exist in the form of valence electrons (Li1+), they can only be combined with one electron, and magnesium is another matter. Under normal circumstances, magnesium ions exist in the form of divalent positive ions (Mg2+), which means that if it is used as a carrier in a battery, it can carry two electrons at a time. Therefore, theoretically, if the two batteries are separated by substances with the same density of magnesium and lithium, the energy storage density of a battery using magnesium as the electron transfer medium will be twice that of a lithium battery. But then again, everyone knows that theory does not necessarily apply to reality. First of all, the key issue is that when magnesium ions combine with two negatively charged electrons, the negative charge of the entire nucleus is twice that of the original. The more negative charges, the stronger the ability to attract other magnesium ions. Therefore, when magnesium ions carry more than twice the charge, they will naturally slow down as they move between the electrolyte-filled poles. But research shows that scientists’ concerns may not have much impact. According to the experimental results, this proves that only four adjacent ions of magnesium ions are bound, which means that when the magnesium ion battery passes through the poles, the maximum number of motions that will affect other ions are lower than previously expected, thus solving this problem. It does not seem to spend too much. Choose a magnesium battery instead of a lithium battery? The computer model shows that the magnesium ions in the electrolyte are only affected by four adjacent ions. Statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous one ：Analysis of the application of silicon materials in lithium batteries