The electric vehicle (EV) battery industry has begun to prepare for the era of the post-lithium-ion era. At the heart of this shift are all-solid-state batteries that use solid electrolytes instead of liquid ones. They are also called “dream batteries” due to their low risk of explosion and ability to store more power compared to ones with the same volume and weight.
The most significant feature of all-solid-state batteries is definitely their safety. While conventional lithium-ion batteries using liquid electrolytes pose a risk of leakage and self-ignition by external impact or under high temperatures, all-solid-state batteries fundamentally eliminate these risks by using solid electrolytes.
The very high market potential of all-solid-state batteries is already clear. According to SNE Research, a market research firm, the global market for all-solid-state batteries is expected to grow rapidly from US$27.5 million (approximately KRW 400 billion) in 2022 to US$40 billion (KRW58 trillion) in 2030.
Three major Korean battery companies are also accelerating their efforts to secure a leading position in the all-solid-state battery era.
Samsung SDI broke ground on Korea’s first all-solid-state battery pilot line, the ‘S Line,’ at its Suwon SDI Research Center in 2022, with a scale of 6500m2. It already supplied its all-solid-state battery samples to its customers in 2023 and aims to commercialize sulfide-based all-solid-state batteries by 2027.
LG Energy Solution is also reportedly constructing a polymer-based all-solid-state pilot line in Ochang, South Korea, with plans to mass-produce sulfide-based, all-solid-state batteries as from 2030.
SK On is developing two types of all-solid-state batteries, polymer-oxide composite, and sulfide-based, with the goal of producing commercial prototypes in 2028 and 2029, respectively. Last August, it jointly developed an oxide-based solid-state electrolyte with the world’s highest lithium-ion conductivity.
The very high market potential of all-solid-state batteries is already clear
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