SK On sulfide-based all-solid state battery: energy density target 800Wh/L

SK On sulfide-based all-solid state battery: energy density target 800Wh/L

Recently, the global battery technology field has ushered in a major breakthrough. South Korean battery manufacturer SK On announced that the energy density target of sulfide-based all-solid-state batteries it developed is set to be 800Wh/L, which is far beyond the current performance indicators of mainstream lithium-ion batteries, and has attracted widespread attention from the industry. This article will combine the hot topics of the entire network for the past 10 days to analyze the background, significance and future prospects of this technological breakthrough for you in detail.

1. Technical background of all solid state battery

All-solid-state batteries are regarded as the core direction of next-generation battery technology. They use solid-state electrolytes to replace traditional liquid electrolytes, which have the advantages of higher safety, longer life and higher energy density. According to different technical routes, all-solid-state batteries are mainly divided into three categories: oxide system, sulfide system and polymer system.

2. Details of SK On technology breakthrough

The sulfide-based all-solid-state battery announced by SK On this time has the following key technical characteristics:

Through innovative sulfide electrolyte formulas and interface engineering, the SK On R&D team successfully solved key technical problems such as poor chemical stability and large interface impedance of traditional sulfide batteries. The patented technologies it uses include:

1. New sulfur silver germanium ore solid electrolyte material
2. Atomic layer deposition interface modification technology
3. Three-dimensional composite electrode structure design

3. Analysis of industry competition pattern

Globally, competition in the research and development of all-solid-state batteries is becoming increasingly fierce. The following is a comparison of the latest progress of major participating companies:

4. Prospects of technical application prospects

If SK On’s 800Wh/L energy density goal is achieved, it will bring about revolutionary application changes:

1.Electric Vehicle Field: It can easily exceed 1,000 kilometers of electric vehicles and greatly shorten the charging time.
2.Aviation field: Provide viable power solutions for electric aircraft.
3.Energy storage system: Significantly improve energy storage density and reduce unit energy storage costs.
4.Consumer Electronics: Increase the battery life of smartphones and other devices by 2-3 times.

According to industry forecasts, the global all-solid-state battery market size will grow from about US$500 million in 2023 to more than US$30 billion in 2030, with an annual compound growth rate of more than 50%. SK On this technological breakthrough will undoubtedly accelerate this process.

5. Challenges and future directions

Despite the broad prospects, sulfide all-solid-state batteries still face many challenges:

SK On said that more than US$1 billion will be invested in the research and development of all-solid-state batteries in the next three years, focusing on breaking through the two major bottlenecks of material stability and mass production processes. At the same time, the company is negotiating cooperation with several auto manufacturers and plans to launch engineering samples by 2025.

With the acceleration of global carbon neutrality, the importance of high-performance battery technology is becoming increasingly prominent. SK On announced the 800Wh/L energy density target this time not only represents a cutting-edge breakthrough in battery technology, but also is likely to reshape the future landscape of energy storage and application. Industry experts predict that 2024-2025 will become a key window period for the commercialization of all-solid-state battery technology, and it is worthy of continuous attention.