As solid-state battery technology moves from the laboratory to the production line, it is becoming increasingly important to clarify the difference between semi-solid state batteries and all solid state batteries.
According to industry insiders, in order to avoid market confusion, relevant departments are considering issuing new guidance to uniformly rename "semi-solid" batteries as "solid-liquid" batteries. This change reflects the fundamental technological differences between these two types of batteries in the context of accelerated industrial development.
The solid-state battery market is booming, and according to the "2025 Blue Book of High Quality Development of Solid State Batteries", it is expected that global shipments will reach 614.1 gigawatt hours by 2030. It is expected that the market size will exceed 100 billion yuan, of which semi-solid state batteries account for about 85%.
This naming adjustment comes at a time when the Chinese Ministry of Industry and Information Technology and other departments have identified solid-state batteries as a key research direction, and local governments continue to provide policy support in industrial planning and standard setting.
All solid state batteries require ion conduction to be conducted entirely through solid electrolyte, without involving the liquid phase, while semi-solid products usually still contain liquid or gel components. There are fundamental differences between these two technologies in terms of safety, cycle life, production process, and cost.
Semisolid state batteries retain 5-10% of liquid electrolyte, avoiding thermal runaway while maintaining high energy density. Its compatibility with existing devices significantly reduces the industrialization threshold, making it a practical step towards all solid state technology.
Promote clearer terminology consistent with China's broader policy framework for advancing battery technology. In 2025, the country introduced the "Determination Method for All Solid State Batteries", providing a unified measurement standard for technical research, product certification, and market applications.
The introduction of this standard effectively prevents "pseudo all solid state" products from disrupting market order, safeguards consumer rights and industry order, and also creates technical pressure on enterprises that rely on the concept of "semi-solid state" for speculation.
The development of solid-state batteries is accelerating globally. QuantumScape recently announced that it has started providing B1 level battery samples for testing to automotive original equipment manufacturers. Major automobile manufacturers have developed different implementation schedules for solid-state batteries, with Nissan planning to conduct trial production as early as 2025, Toyota aiming for 2027-2028, and Mercedes Benz aiming for 2030.
Market analysis shows that solid-state batteries have enormous growth potential, especially in the field of consumer electronics. It is expected that by 2029, the global market size of solid-state thin-film lithium-ion batteries will reach 2.21 billion US dollars, with a compound annual growth rate of 16.0%.
With the development of the industry, the shift in terminology from "semi-solid" to "solid-liquid" is not just a change in name, it reflects the continuous maturity of the technology and the demand for precise communication as these power sources approach widespread commercialization.
This name clarification comes at a critical moment for enterprises to balance technological feasibility with market demand, utilize practical applications to improve technology, and promote the development of all solid state batteries.
