The charging lithium battery will be replaced by a solid battery? The road to go is still very long.

The charging lithium battery will be replaced by a solid battery? The road to go is still very long.

The rhythm of the three-dimensional lithium-ion battery is changed from the rhythm of the solid state battery.. Recently, the Institute of Ningbo Material Technology and Engineering, my country, announced that the nano-pilot special “full solid-state battery” topic taken by its lead has passed the acceptance, and this technology will further promote the scale of domestic full solid lithium-ion batteries.

. This news came out and immediately caused a huge response in the battery industry..

Industry insiders told reporters: “With the current ternary lithium-ion battery technology route, power lithium battery energy density monomer to do 350WH / kg goals, basically impossible within five years. Moreover, even if it is realized, security cannot be guaranteed..

Therefore, the commercialization of solid state batteries can break through, and the prospect of automotive electricity affects. “As the core of electric vehicles, breakthroughs in the battery are undoubtedly impact on the development of batteries and even the automotive sector. So, can the solid-state battery will replace the ternary lithium-ion battery? How far is the marketization? Sanyuan lithium ion Natural defects of the battery: energy density and stability contradictions “have a company single year, 60 electric vehicles, burning explosions last year.

. “In the Sino-Japanese and Korean Lithium TV Forum, the director of the new energy materials and technical laboratory of Peking University. Its professor believes that there are many defects in three-yuan lithium-ion batteries, and the security issues are very worrying.

. “Whether in terms of chemical structures, it is still very easy to heat up from the battery structure..

If you can’t transfer heat in time, the battery has the risk of explosion.. However, at this stage, in the safety, reliability of the battery, there is no perfect solution.

“In addition to security issues, in terms of new electric vehicle life, the monomer energy density of the three-dimensional lithium ion battery is also close to the limit, and it is difficult to break through. Battery package supplier Zhengli is the executive vice president Zhou Nan told the first electric: “Now, whether it is industry policy, or market demand, new energy vehicles have high requirements for power lithium battery energy density..

Under the system of the prior art route, to increase the energy density, only the nickel material can be improved or added to the addition of CA, but the thermal stability of the high nickel is very poor.. Therefore, once the energy density is improved, once the energy density is improved, the stability decline, the thermal reaction in the battery is very violent, and safety has become a big problem.

. “For this reason, the national” 863 “planning energy saving and new energy vehicle major project overall expert group expert Xiao Chengwei once expressed that the three-dimensional lithium-ion power lithium battery has now seen the energy density” ceiling “, high-nickel material , Carbic silicon negative lithium ion battery monomer energy density should be around 300Wh / kg, positive and negative no more than 20WH / kg. According to the planning of the national power lithium battery technology roadmap, the monomer energy density target of the lithium-ion battery in 2020 is 350Wh / kg.

From now on, this goal is no longer implemented.. In order to ensure the high energy density and safety of the power lithium battery, the progress of solid state battery development has brought light and bright to this industry.

. Domestic and foreign companies compete for layout, solid-state batteries become trend solid batteries, as the name implies are batteries that use solid electrodes and solid electrolytes. Since the solid-state battery electrode and electrolyte are made of solid material, the solid electrolyte is not flammable, no corrosion, no volatilization, no leakage, and also overcomes the lithium branch crystal, even if heated to a very high temperature, no Holding fire, there is a higher security.

Carrying a full solid-state lithium-ion battery, the self-burning probability will be greatly reduced. It can be said that the ideal object of next-generation new energy vehicle power lithium battery. At present, more and more domestic and foreign companies and research institutions will focus on all solid-state lithium-ion batteries, and there are also many automotive manufacturers to reveal the plan based on solid state batteries.

. For example, Volkswagen announced that the planned R & D is 1000km solid state battery; Toyota is expected to complete the research and development of solid state in 2022, and plans to achieve mass production in 2030; Japanese Economic and China is also announced in 2017 to announce $ 1.6 billion in 2017, United Toyota Honda, Nissan, Panasonic, GS Tang Shallow, Dongli, Xucheng, Sanjing Chemistry, Mitsubishi Chemistry and other domestic excellent industrial chain power, jointly develop solid batteries, I hope to achieve 800 kilometers of battery life in 2030.

Ouyang Minggao, a specialized chief expert of the national new energy vehicle key science and technology, has also pointed out that many domestic research institutes, the company layout solid-state battery, the Chinese Academy of Sciences, Ningbo Materials, and the Lithium Lithium Lithium Lithium Lithium, is promoting its industrialization, plan 2019 Solid state battery. As the “heart” of the new energy car, the power lithium battery will undoubtedly determine the future of new energy vehicles..

The industry is generally believed that the future development path of the power lithium battery is that the electrolyte is mixed from liquid, semi-solid, solid-liquid, and will eventually achieve full solid-state process.. This prompted a new round of investment and research of well-known giants such as startups, universities and TSLA.

. Toyota’s timetable relatively reliable, solid state production may wait until 2030, the solid-state battery wants to develop further, but also need to solve multiple difficulties. Zhou Nan told the first electric: “Solid electrolyte is the key to the development of solid state batteries, the solid-state battery has no liquid infiltration, and does not need to pass the film, only use the solid electrolyte as a diaphragm, placed in the positive electrode plate and the negative electrode plate, then metal Material material is especially critical.

“Electrolyte material is the core of all solid-state lithium-ion battery technology. At present, the research of solid electrolyte is important in three major categories: polymers, oxides and sulfides..

The polymer has a good high temperature performance, has a commercial application case; the oxide cycle performance is good, suitable for thin film flexible structures; the highest sulfide conductivity is the future direction. However, there are still a few specific puzzles to overcome: First, the conductivity of the interface is maintained at the appropriate level, and cannot be too high, and the material is very difficult to develop..

Second, there is no compound material that is high-magnification and fast charging. Now the solid electrolyte material can only accommodate one of them..

An industry insiders who are unwilling to have also expressed the same view. He believes: “The solid-state electrolyte has a high resistance. There are still some problems to be solved in terms of power density.

From solid electrolytes, positive and negative materials. There is a small challenge in conductivity, battery magnification, battery preparation efficiency, and cost control. Once these problems can be effectively solved, there will be a new battery revolution in the future.

. “Since it is difficult to import, the solid-state battery is fully applied to the new energy car? Ouyang Ming Gao said that the full solid-state lithium-ion battery is expected to break through between 2025 and 2030..

In May this year, Shinzuoabe, general manager of Toyota Power Assembly, revealed that “Toyota expects to create solid batteries after 2020, but to achieve the mass production of solid state, wait until 2030. “Zhou Nan, who has been in the battery industry for more than ten years, to the first electricity:” From the related experience of past, Toyota Plan and the actual situation are basically consistent..

Perhaps in recent years, they can launch solid-state batteries, but how is the specific production, cost can not adapt to the market, but also a big question mark. “.

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