TU-TESL

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In 5g era, electrolyte, one of the four materials for mobile phones, is required to be higher. Electrolyte is called "blood" of lithium battery. The main function of electrolyte is to conduct electrons between positive and negative electrodes of lithium battery. Electrolyte has an important influence on the safety, cycle life, high and low temperature performance of lithium battery. Generally, electrolyte is composed of solvent, solute and additive. The mass ratio of solvent, solute and additive is 0.80:0.15:0.05. DMC is the most widely used electrolyte solvent. The purity of ultrapure DMC is higher than that of battery DMC. DMC can improve the energy density and prolong the service life of 5g cell phone battery. Compared with 4G mobile phone, ch3o-cooch3, the molecular formula of DMC, has many advantages such as fast network speed and high spectrum utilization. However, 5g mobile phone needs to deal with more tasks and larger bandwidth, and the number of antennas used is significantly increased. These factors will lead to increased power consumption of 5g mobile phone, so the endurance of 5g mobile phone is relatively short. Energy density represents the amount of electricity stored in a unit mass of battery, which determines the battery life of a mobile phone. The ultra pure DMC helps to improve the energy density of the cell phone battery, so that the cell phone battery can store more power, and then realize the extension of the cell phone's endurance time. In addition, the short endurance means that 5g mobile phones need to be charged frequently, which will affect the battery life of mobile phones. Ultra pure DMC helps to extend the battery life of mobile phones. Because the electrolyte solvent with less impurities can reduce the negative reaction of cell phone battery in the process of charging and discharging, and then increase the number of times that cell can be charged, thus extending the service life of cell phone battery. In addition, ultra pure DMC can improve the fast charging function of cell phone battery. According to Baichuan information, at present, the quotation of Shi dashenghua, the leading manufacturer of ultra pure DMC, is 10700 yuan / ton, up 15.55% from October 14. The voltage of 4G mobile phone battery is generally 4.4V, while the voltage of 5g mobile phone battery should reach 4.5v-4.6v. Improving the battery voltage is one of the important ways to improve the endurance time of 5g mobile phone. Because energy density = battery capacity × voltage / battery weight. It can be seen that increasing the battery voltage can increase the energy density of the battery. However, in the case of high voltage, the electrolyte is easy to be oxidized and decomposed. Once the electrolyte is oxidized and decomposed, the positive and negative electrodes of the battery will be destroyed, especially the decomposition of the electrolyte on the positive electrode is easy to intensify. To solve this problem, additives are the key. Boron containing additives are suitable for high voltage batteries. Boron containing additives will be oxidized prior to solvents in the process of lithium battery cycle, and then form a protective film to cover the positive electrode surface. The protective film has good ionic conductivity, which can inhibit the oxidation decomposition of electrolyte in the subsequent battery cycle and the destruction of the positive material structure of lithium battery, thus stabilizing the interface between electrolyte and electrode, so as to enhance the stability of the positive interface. Shida Shenghua announced on August 20 that the company will invest in the 5000 ton / year electrolyte additive project, which includes boron containing additive products. Ultra pure DMC and boron containing additives can improve the performance of 5g mobile phone battery, thus improving the user experience. With the continuous growth of 5g mobile phone sales, ultra pure DMC and boron containing additives will be more widely used.