Why is the development of lithium-ion battery technology slow?

　　In the past seven years, mobile phones have completed the transformation from feature phones to smart phones, and the role of mobile phones in life is becoming more and more important. However, the development of mobile phones is changing with each passing day, and the performance and other aspects have been developed by leaps and bounds. Only the battery technology has been developing slowly, which has also become an important factor restricting the further development of mobile phones.

　　Development history and current situation　　Lithium battery was the earliest application in cardiac pacemakers. The self-discharge rate of the lithium battery is extremely low, and the discharge voltage is gentle, etc., so that the pacemaker implanted in the human body can operate for a long time without recharging. Lithium batteries generally have a nominal voltage higher than 3.0 volts and are more suitable for integrated circuit power supplies.　　 Sony successfully developed lithium-ion batteries in 1991. Its commercialization has greatly reduced the weight and volume of people's portable electronic devices such as mobile phones, notebooks, and calculators. But after nearly two decades of development, whether it’s smart phones, tablet computers, or today’s extremely popular Tesla electric cars, the lithium battery technology used in all electronic devices is in technical use with the lithium-ion battery developed by Sony. There is no essential difference. Lithium battery technology seems to have entered a dead end, from the promoter of the electronics industry to the restrictor of the industry.　　Battery　　 Tesla’s super-large lithium battery pack　　 But don’t be blindly pessimistic. In these two decades, lithium battery technology has not completely stagnated. After years of technological expansion, lithium battery technology has made considerable progress. Especially in terms of charging efficiency, battery capacity, heating and cooling, etc., traditional lithium batteries have also performed better and better. In addition, with the rise of the electric vehicle industry, the innovation and development of lithium battery technology will be accelerated. If you want to achieve revolutionary changes, you need to wait slowly.　　Technology bottleneck　　Since the lithium battery technology has reached the development bottleneck, is there any other type of chemical battery that can replace it? For now, the answer is no.　　 Lithium battery is the battery with the best performance among all the commercial secondary chemical batteries so far. Its main characteristics are: high specific energy, long cycle life, wide charging power range, and good rate discharge performance.　　Although there are many advantages of lithium batteries, there are still many problems to realize large-scale and large-capacity use. The number of lithium ions in a lithium battery is fixed. If you want a longer battery life, you must increase the number of batteries, but this in turn means heavier equipment, greater heat generation, and a higher possibility of overheating and explosion. This is also the main reason why many mobile phones have become a "hand warmer" after heavy use. If you want to be safer or more portable, you must sacrifice the number of batteries and use time. Battery OPPO flash charging technology As there is no other material that has better battery performance than lithium batteries for the time being, many mobile phone manufacturers have begun to change their thinking to solve this problem, such as OPPO’s VOOC flash charging technology, which can be within 30 minutes according to the official introduction. Charging up to about 75%, while solving the heating problem of fast charging, ensuring absolute safety, this method is to improve the charging efficiency, and it is worthy of vigorous promotion. For another example, although the wireless charging technology driven by Nokia is not yet mature, the charging efficiency needs to be improved. However, the idea is very good. In the future, it can develop to a wireless charging technology that does not perceive a large range and break the inherent charging limit. Whether the lithium battery technology can continue to develop in the future will be affected by both positive and negative aspects: one aspect is emerging industries such as smart phones and electric vehicles, which continue to expand demand and promote the rapid growth of the lithium battery industry share, while various technology companies increase battery technology This will greatly promote the development of lithium battery technology. On the other hand, as the energy problem of human society intensifies, people’s desire for new energy is very urgent. Will there be a more efficient product to replace lithium batteries in the future. However, the former of these two aspects is inevitable at present, while the latter is unknown.　　Summary　　 At this stage, many new battery solutions have emerged. The battery technology update is a long one. In addition to the technology reaching the commercial level, it is also necessary to replace the batteries of a large number of electronic products and equipment on the market. But we still hope that this day will come.