Lithium battery research and development has reached its limit?

　　The hardware configuration of smart phones has been upgraded to a very high level. The CPU computing frequency of the 8-core integrated graphics card of mid-to-high-end smart phones even surpasses some PC devices, while 2K high-definition display screens, 6G running memory, and high-fidelity audio drivers are not available. Not a big consumer of electricity. While mobile smart devices provide users with a better experience, they also put forward more radical requirements for battery life.　　 At present, it is generally believed that the culprit causing the frequent fires of Samsung Galaxy Note 7 is its built-in non-removable 3600 mAh lithium battery. Compared with the 1400mAh battery capacity used in the early 2007 iPhone, the battery capacity of high-end smartphones has increased by more than 2.5 times in the past ten years. Despite this, users are still dissatisfied with the weak battery life of current smartphones. However, in the current situation of providing longer battery life and high-density and light-weight lithium batteries, safety has begun to become a topic of widespread discussion among the public. We are down to which direction the research and development of lithium batteries need to develop, more efficient or safer. It is understood that from the perspective of usage, lithium batteries are currently divided into two categories: "power batteries" and "rechargeable batteries". The lithium-ion batteries (Li-ion) used in mobile phones are not only in the strict sense. The physical unit of the electrical board also includes an IC circuit module that controls the voltage accuracy. Compared with lithium batteries that supply driving power such as automobiles, batteries used in mobile devices are smaller and denser, but they have relatively high requirements for charging and discharging environments and appear more "squeaky".　　Samsung and Apple exploded in succession in research and development of lithium batteries has reached the limit?　　 Checking relevant information shows that during the charging of the lithium battery, lithium ions move from the cathode to the anode. When the battery is in use, the lithium ions move in the opposite direction. Between the cathode and the anode is an electrolyte substance, which can help the movement of electric ions and conduct electric current. In order to prevent the movement of electric ions without contact between the anode and cathode, the battery manufacturer inserted a separator between the two poles. South Korean media quoted Professor Kim Dong-won from the Department of Chemical Engineering of Hanyang University as saying, “Increase the capacity of the battery without changing the volume of the battery, only to make the separator thinner, or put more electrode activating substances in the anode and cathode, or Increase the maximum voltage that the battery can withstand when charging." 　　 "In fact, these two conditions will increase the possibility of battery explosion." Professor Jin does not accept the statement that all the responsibility is left to the battery supplier, "but fire accidents may occur one after another It is also because smartphones are carrying more and more functions, which make the battery overloaded." Overcharging or charging the battery too fast may cause the battery to catch fire or explode.　　Professor Jeong Yu-hyun from Sogang University in South Korea also believes that “developed social media has magnified a small number of fire cases. It is too hasty to discuss whether there are product defects”. Industry insiders believe that “the South Korean media’s reports on the recent three iPhone explosions may be diluting responsibility, but under the reality that the research and development of lithium batteries has reached the limit, it is rational to reflect on safety, which can help improve the discovery of the real explosion. The reason.” According to a person from the battery industry, the current life of lithium batteries has reached 90% of the limit. Without new material alternatives, it is difficult for smart device batteries to be improved under the conditions of both battery life and size. The current battery accident More and more attention, the most important task of the current battery industry is not to cover up potential dangers, but to seek safety solutions.