18650 lithium battery 3000mah manufacturers explain in detail all-solid-state 18650 lithium battery 3000mah technology and development prospects

　　18650 lithium battery 3000mah manufacturers explain in detail all-solid-state 18650 lithium battery 3000mah technology and development prospects. In the field of chemical energy storage research, although all-solid-state lithium batteries appeared relatively late, compared with other batteries, all-solid-state lithium batteries are lighter in weight, have relatively high specific energy and specific power, and have a long service life. cycle, so it quickly attracted people's attention and became a rising "star" in the field of electrochemical energy storage technology. The following 18650 lithium battery 3000mah manufacturers explain in detail all-solid-state 18650 lithium battery 3000mah technology and development prospects.

　　All-solid-state 18650 lithium battery 3000mah technology

　　A solid-state battery is a battery that uses solid positive and negative electrodes and solid electrolytes, does not contain any liquid, and all materials are composed of solid materials. Compared with ordinary lithium-ion batteries in the past, all-solid-state lithium batteries are not only simpler in structure, only composed of positive and negative electrodes and solid electrolytes, but also use all-inorganic materials such as sulfide and polymer polymers such as PEO-based Using chemical materials as the electrolyte greatly improves the safety and energy density of the battery, and has good high-temperature adaptability. It completely solves the problem that the electrolyte of lithium-ion rechargeable batteries in the past is prone to volatilization or even explosion under high-temperature conditions. The battery's The cycle life is also effectively extended. During the charging process of an all-solid-state 18650 lithium battery 3000mah, lithium ions will decarburize from the active material lattice of the battery's positive electrode and migrate to the negative electrode with the help of the solid electrolyte. The external circuit is responsible for realizing the migration of electrons to the negative electrode. The two are integrated into each other to form lithium atoms and other substances, which will then be embedded into the negative electrode material.

　　Advantages of all-solid-state lithium batteries

　　One of the advantages: light - high energy density. The reason for the increase in energy density is firstly that it uses less electrolyte/material and is thinner; then most solid-state electrolytes have a wider electrochemical window, so they can be compatible with more high-voltage cathode materials; not only that, all-solid-state batteries are good The safety and high voltage can also simplify the battery management system BMS, so the energy density of the battery system finally installed in the vehicle can be increased.

　　Advantage two: thin - small size. It goes without saying that batteries with small size/high energy density are important to consumer electronics, but for power batteries, relatively compact size is still very important. In traditional lithium-ion batteries, the separator and electrolyte together account for nearly 40% of the battery's volume and 25% of its mass. Using an all-solid-state system is expected to reduce this proportion.

　　Advantage three: safer and better reliability. Consumer electronics use very little battery, but an explosion of a mobile phone has everyone talking. In recent years, my country's electric vehicle policies have gradually become clearer, requiring an increase in the energy density of power batteries. However, in the context of high energy density of batteries and improvement in rate performance, the requirements for battery safety performance will only become more and more stringent. Solid-state batteries are expected to fundamentally solve a series of problems such as the formation of lithium dendrites and complex reactions between electrode materials and electrolytes. This can significantly improve the service life and reliability of the battery during use, so it is very important.

　　The development prospects of all-solid-state lithium batteries

　　At present, the development of new energy vehicles has clearly risen to the national strategic level. Among them, power batteries are the most critical core component of new energy vehicles, and its criticality is evident. Under the guidance of policies of various countries, a global all-solid-state lithium secondary battery technology competition has begun. It is expected that hybrid solid-liquid lithium secondary batteries are expected to be the first to enter the terminal market in 2020, and all-solid-state lithium secondary batteries will begin to enter the market in 2022. The terminal market will eventually enter the electric vehicle market with the improvement of comprehensive technical indicators such as cyclability, rate, high and low temperature, and safety, and the swarming research institutions and enterprise alliances may bring the emergence of all-solid-state lithium secondary batteries. Time ahead.

　　It is the breakthrough and practice of lithium batteries in power applications, especially the promotion and application of new energy vehicles. Taking the domestic market as an example, 2016 was the fastest growing year for new energy vehicle sales, with the annual growth rate reaching 84 %, as lithium batteries are complementary products to electric vehicles, sales and industry scale have also grown. On the other hand, lithium batteries are increasingly used in electronic products and are constantly replacing other types of batteries.

　　To summarize, the development from liquid electrolyte to all-solid-state battery will go through a process: the electrolyte content in the electrolyte will gradually decrease, and the starting gel electrolyte (such as PEO) system will gradually develop into a semi-solid state, and finally transition to a true all-solid-state battery. In this process, the anode materials used will also continue to deepen. Pre-lithiated anodes and even lithium metal anodes that have been explored by countless scientists for many years will become our ultimate goal. In this process, the energy density of the battery can finally reach the vision of 350 or even 500Wh/kg.

　　All-solid-state battery technology is recognized by everyone as an innovative battery technology that will focus on development in the next generation. Although there are still many limitations in applications such as Ah-level batteries or EVs, at least for now, the future is bright. I believe that in the near future As technology becomes more and more mature, problems can be easily solved. By that day we may no longer have to worry about the current headache of failing battery safety tests.

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