Japanese Researchers Develop All-Solid-State Air Battery for Portable Electronic Devices

According to a previous report by The Paper, at the Cloud Yibin High-end Forum of the Second World Power Battery Conference held on the afternoon of April 16, Ouyang Minggao, academician of the Chinese Academy of Sciences and professor of Tsinghua University, said: “Although all-solid-state battery technology is still facing challenges There are many challenges, but it is still a goal worth pursuing. This goal is not short-term, and it can be regarded as a goal worthy of innovation for 2030.”

In the forum, Ouyang Minggao also warned Chinese new energy car companies and battery companies to attach great importance to this technical route. He said, “Countless people around the world have now invested in this innovation movement. With the emergence of ChatGPT technology, the efficiency of exploring new materials has been greatly improved, and the development cycle can be shortened. Through global efforts, all-solid-state batteries can be successful. .”

“We found that the papers related to solid-state battery technology published in the world’s top journals are growing exponentially. It can be said that the technology is on the eve of commercialization.” Ouyang Minggao said.

It is understood that Japanese companies have invested the most in all-solid-state batteries in the world. Toyota, which has the most patents for solid-state battery technology, plans to achieve small-scale mass production of all-solid-state batteries by 2025, and achieve stable mass production of all-solid-state batteries by 2030.

According to the Shanghai Securities News, on April 26 this year, Honda held a press conference on corporate reform measures such as electrification. According to reports, in addition to continuing to promote the development and evolution of liquid lithium-ion batteries, Honda will also develop and launch semi-solid and all-solid batteries. And other new-generation batteries, it is planned to start a demonstration production line of all-solid-state batteries in 2024.

Not long ago, the German BMW Group announced that it will build a pilot production line for all-solid-state batteries and launch the first prototype in 2025; Weilai also said that models equipped with 150kWh semi-solid-state batteries will be launched in the first half of this year.

Huatai Securities believes that under higher safety and energy density requirements, solid-state batteries have emerged as the times require. The introduction of solid electrolyte can greatly improve the safety performance of the battery, while matching the positive and negative electrodes with high energy density can increase the energy density of the battery. The electrolyte route of solid-liquid hybrid battery has formed a preliminary consensus. In the short term, solid-liquid hybrid battery will be the main route, and it will gradually evolve to all-solid state in the future. It is estimated that by 2030, the global solid-state battery market space will exceed 300 billion yuan. From the point of view of the industrial chain, the main changes lie in the electrolyte and negative electrode, and focus on the incremental demand brought about by changes in the material and process ends.

In terms of market size, Guanyan Tianxia estimates that the scale of China’s solid-state batteries is expected to reach 2.9 billion yuan in 2025, and break through 20 billion yuan in 2030. The compound growth rate from 2022 to 2030 is expected to reach 55.01%. In terms of shipments, domestic shipments are expected to reach 24GWh in 2025 and exceed 250GWh in 2030, with a compound growth rate of 74.66% from 2022 to 2030.

What is a solid state battery? What are the advantages over lithium-ion batteries?

The so-called solid-state battery refers to a lithium-ion battery using a solid-state electrolyte.

Solid state batteries are a type of battery technology. Unlike lithium-ion batteries and lithium-ion polymer batteries that are commonly used today, a solid-state battery is a battery that uses solid electrodes and solid electrolytes.

Since the scientific community believes that lithium-ion batteries have reached their limits, solid-state batteries have been regarded as batteries that can inherit the status of lithium-ion batteries in recent years. The solid-state lithium battery technology uses a glass compound made of lithium and sodium as a conductive substance to replace the electrolyte of the previous lithium battery and greatly increase the energy density of the lithium battery.

The biggest difference between solid-state batteries and the current mainstream traditional lithium-ion batteries is the electrolyte. Solid-state batteries use solid electrolytes to replace the electrolyte and diaphragm of traditional lithium-ion batteries. The traditional lithium-ion battery is mainly composed of positive and negative electrode materials, electrolyte and separator. The positive and negative electrode materials determine the capacity of the battery, and the electrolyte and separator serve as the medium for the transmission of lithium ions. This is the essential difference.

Solid-state batteries can take into account high safety and high specific capacity, and can achieve lower manufacturing costs than liquid batteries in the long run. Solid-state batteries can take into account high safety and high specific capacity electrode materials, which is a necessary path to achieve higher energy density. At the same time, due to higher theoretical module space utilization and simpler battery assembly processes, they have lower theoretical cost.

From the perspective of safety, solid-state electrolyte materials have good thermal stability, are not easy to burn, and solid-state batteries have no risk of electrolyte leakage, which has better safety.

From the perspective of energy density, solid-state batteries have good compatibility with lithium metal anodes, high module space utilization, and flexible configuration, which are expected to further increase energy density.