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2025 Solid-State Battery Unveiling: Rapid Progress, Is the Future Here?

2025-5-8

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Solid-state batteries: Initiating a new era of energy

Under the current great wave of energy transition, solid-state batteries, as a highly promising next-generation battery technology, are gradually becoming the focus of the global energy field. From electric vehicles to energy storage systems, solid-state batteries, with their unique advantages, are expected to bring revolutionary changes to numerous fields. The year 2025 has arrived. How high has the development of solid-state batteries reached? What new breakthroughs and progress have there been? Today, let's have an in-depth discussion together.

Technological Breakthrough: The Leap from the laboratory to reality

(1) The Rise of new electrolyte materials
As a key component of the battery, the performance of the electrolyte directly affects the overall performance of the battery. In 2025, remarkable progress was made in the research and development of new electrolyte materials. The team led by Pang Quanquan from Peking University has successfully developed a novel glassy phase sulfide solid electrolyte material, LBPSI (Li₂ S-B ₂S₃ -P ₂S₅ -LiI). This material not only has a high ionic conductivity, but also is endowed with a unique REDOX mediation function. In all-solid-state lithium-sulfur batteries, it can activate the two-phase interface reactions that are difficult to occur in traditional batteries, achieving rapid solid-sulfur reaction kinetics. The all-solid-state lithium-sulfur battery developed based on this material can release a high specific capacity of 1497 mAh g⁻¹ at a 2C rate. Even when charged at an ultra-high rate of 20C, the capacity can still reach 784 mAh g⁻¹. Moreover, after 25,000 cycles at a 5C rate at 25°C, It can still maintain 80.2% of the initial capacity, demonstrating outstanding fast charging performance and an extremely long cycle life. This breakthrough provides a brand-new technical solution for the development of the next-generation power batteries with high specific energy, high safety and low cost, and gives us a glimpse of the dawn of the wide application of solid-state batteries in the field of new energy vehicles.

(2) Optimization and upgrade of interface stability
In solid-state batteries, the stability of the interface between the electrode and the electrolyte has always been a key factor restricting battery performance. In the past, side reactions between the electrode and the electrolyte would lead to an increase in interfacial impedance, thereby affecting the charging and discharging efficiency and cycle life of the battery. Nowadays, scientists have effectively reduced the side reactions between electrodes and electrolytes by developing new interface coating materials, such as Li₃PO₄, LiAlO₂, etc. In addition, the application of in-situ curing technology also provides a new way to form a stable solid-solid interface. By in-situ curing the electrolyte during the battery assembly process, it is possible to ensure close contact between the electrode and the electrolyte, reduce the interface impedance, and enhance the stability of the battery at high voltages. Taking the experiments of a certain research team as an example, after adopting the new interface coating material and in-situ curing technology, the cycle life of the battery was successfully extended to over 1,000 times. This undoubtedly lays a more solid foundation for the commercial application of solid-state batteries.

(3) The dawn of application for lithium metal Anodes
Lithium metal anodes are regarded as an ideal choice for enhancing battery energy density due to their extremely high theoretical specific capacity (3860mAh/g). However, in the past, the growth problem of lithium dendrites seriously hindered the practical application of lithium metal anodes. Lithium dendrites will grow on the surface of the negative electrode during charging and discharging. Once they Pierce the separator, they will cause a short circuit in the battery and lead to safety accidents. In 2025, a major technological breakthrough was achieved in inhibiting the growth of lithium dendrites. Researchers have effectively inhibited the growth of lithium dendrites by developing technologies such as three-dimensional lithium metal anodes and artificial SEI films. Meanwhile, through electrolyte modification, such as adding LiF, Li₃N, etc., the compatibility between lithium metal and the electrolyte has been improved. These technological breakthroughs have made it possible to apply lithium metal anodes in solid-state batteries, which is expected to achieve a battery energy density exceeding 500 Wh/kg and enhance battery safety at the same time. Scientists from the University of Maryland in the United States have developed a brand-new design. By adding a fluorine-rich intermediate layer to stabilize the cathode side and modifying the anode intermediate layer with magnesium and bismuth, they have successfully suppressed the growth of lithium dendrites, bringing new hope to the production of EV all-solid-state batteries.

Industrialization progress: The Transformation from blueprint to Implementation

(1) The vigorous development of domestic enterprises
In China, the layout and progress of many enterprises in the field of solid-state batteries are encouraging. As a leading global enterprise in power batteries, CATL has been continuously making efforts in the research and development of solid-state battery technology. In 2025, condensed matter batteries have achieved mass production. It is planned to produce solid-state batteries in small batches in 2027 and has obtained patents for doped halide solid-state electrolytes and their preparation methods, further consolidating its leading position in the field of solid-state battery technology. Svolt Energy has also obtained a patent named "Solid-State Battery Modules, Battery Packs and Energy Storage Devices", enhancing the performance of solid-state batteries through unique design and providing new technical support for the industrial application of solid-state batteries. The semi-solid lithium iron phosphate battery project of Guansheng Co., Ltd. has been launched in Wenzhou City. It is expected that after reaching full production capacity, the annual output will be approximately 2.1 million units. The project is expected to be completed and put into operation within 30 months, demonstrating the industrialization potential of solid-state batteries in niche fields. In addition, SAIC Qingtao, a subsidiary of SAIC Motor, is committed to developing a new generation of high-safety and cost-effective solid-state batteries. The IM Motors L6 Lightyear Edition equipped with this technology has submitted an application to the Ministry of Industry and Information Technology, indicating that solid-state batteries are getting closer and closer to consumers.

(II) Accelerated Layout of overseas enterprises
Overseas enterprises are also not willing to lag behind and are accelerating their layout in the solid-state battery field. Hyundai Motor plans to first showcase its pilot production line of all-solid-state electric vehicle batteries to the public in March 2025. This battery, called "Dream", is expected to offer longer range, faster charging and higher energy density. By the end of 2025, Hyundai will launch its first prototype vehicle equipped with this new type of battery. And it is planned to invest more than 9 billion US dollars in the research and development of various battery technologies in the next ten years. Honda has begun trial production of all-solid-state batteries for its electric vehicles, marking the initial success of this veteran automaker after more than a decade of in-depth exploration in the solid-state battery field. Its all-solid-state batteries are expected to be installed and applied in electric vehicles after 2025 or a little later. The actions of these overseas enterprises not only demonstrate the huge potential of solid-state battery technology, but also intensify the competitive situation in the global solid-state battery market.

Market application: The leap from niche to widespread

(1) New energy vehicle field
In the field of new energy vehicles, solid-state batteries are gradually becoming the core driving force for technological upgrades. In 2025, many automakers successively announced their plans to install solid-state batteries in vehicles, which showed us the broad application prospects of solid-state batteries in the field of new energy vehicles.

Saic MG plans to launch a new model equipped with semi-solid batteries in 2025 at an affordable price, which has drawn widespread attention. The L6 model of IM Motors is equipped with the Light-year solid-state battery jointly developed by SAIC Motor and Qingtao Energy. It has a capacity of 133kw/h, a range of over 1000km, and supports 900V ultra-fast charging. It is expected to be launched in 2025. Gac Group has launched a large-capacity all-solid-state power battery with an energy density of over 400Wh/kg, a 50% increase in energy density, and a vehicle range exceeding 1,000 kilometers. It is planned to be installed on its high-end brand, Haobo, in 2026. Byd's solid-state battery has reached an energy density of 400Wh/kg. It is planned to conduct vehicle installation tests in 2025 and be small-scale installed on high-end new energy vehicle models in 2027.

From the layout of these automakers, it can be seen that the application of solid-state batteries will significantly enhance the driving range and performance of new energy vehicles. Compared with traditional lithium-ion batteries, solid-state batteries have a higher energy density and can effectively increase the vehicle's range. For instance, the energy density of some solid-state batteries has exceeded 400Wh/kg, while that of traditional lithium-ion batteries is typically between 200 and 300Wh/kg. Higher energy density means that vehicles can travel longer distances after a single charge, effectively alleviating users' range anxiety. Meanwhile, solid-state batteries also have higher charging and discharging efficiency, enabling faster charging speeds and providing users with a more convenient experience.

(II) Consumer electronics field
In the field of consumer electronics, semi-solid batteries have also demonstrated great application potential. In early 2024, mobile phone manufacturers began to equip their flagship models, especially foldable screen models, with semi-solid batteries. By the end of 2024, VIVO had even applied semi-solid batteries to the mid-range S20, which is priced between 2,000 and 4,000 yuan, further expanding the application scope of semi-solid batteries in the consumer electronics market.

The application of semi-solid batteries in consumer electronics mainly benefits from their advantages in energy density and safety. As the screens of smart phones become larger and their functions increase, the requirements for battery life are also getting higher and higher. The high energy density of semi-solid batteries can meet this demand and provide longer-lasting battery life for mobile phones. Meanwhile, its excellent safety also reduces the risks of the battery during use, making users feel more at ease. With the continuous advancement of technology and the reduction of costs, semi-solid batteries are expected to become the mainstream battery technology for consumer electronics in the future, providing consumers with a better user experience.

(3) Energy storage field
The application of solid-state batteries in the field of energy storage has also made remarkable progress. Since the beginning of 2025, the bidding for three solid-state battery technology energy storage projects has been initiated, with the procurement demand for solid-state batteries exceeding 412MWh. The three major projects are the procurement of a 4.5MW / 9MWh semi-solid energy storage system for Huadian Digital Intelligence Buliangou Coal Mine, the engineering general contracting (EPC) for a 100MW/400MWh solid-state lithium battery energy storage project in Feicheng, Tai 'an, and the procurement of various forms of hybrid energy storage system equipment for the construction project of the Hainan Prefecture Photovoltaic and Energy Storage Integration Demonstration Base of Guodian Power Investment. According to statistics, since 2024, the demand for solid-state battery energy storage has begun to accelerate its release, with the total procurement demand approaching 1GWh.

The application of solid-state batteries in energy storage projects has injected new vitality into the development of the energy storage industry. Its features such as high energy density, long service life and high safety can effectively enhance the performance and stability of energy storage systems. On the grid side, solid-state battery energy storage systems can help balance grid loads and enhance the stability and reliability of the grid. On the user side, solid-state battery energy storage systems can be used for household energy storage, commercial energy storage, etc., to achieve efficient utilization and management of energy. With the continuous maturation of solid-state battery technology and the reduction of costs, its application prospects in the energy storage field will be even broader, and it is expected to become an important driving force for the development of the energy storage industry.

(4) Low-altitude economic sector
In the field of low-altitude economy, the application of solid-state batteries has brought new opportunities for the development of eVTOL (Electric Vertical Take-off and Landing Aircraft). 2025 is expected to be the first year of commercial operation of eVTOL. High-performance batteries are the key, and solid-state batteries, due to their higher safety and energy density, have become the mainstream choice for the future development of eVTOL.

eVTOL manufacturers such as Ehang and Peafeng are collaborating with leading battery manufacturers to develop high-performance batteries. The battery life of the EH216-S model equipped with solid-state batteries has been increased by 60% to 90%, marking a broad application prospect of solid-state batteries in the low-altitude eVTOL field. The high energy density of solid-state batteries enables EVTOLs to carry more cargo or passengers and significantly enhance their endurance, laying the foundation for the sustainable operation of electric aircraft. With the continuous advancement of technology and the reduction of costs, the application of solid-state batteries in the low-altitude economy will continue to expand, promoting the rapid development of the low-altitude economy.

Challenges and Prospects: Seeking Light in Adversity

(1) Technical challenges faced
Although solid-state batteries made significant progress in 2025, they still face many technical challenges. The interfacial impedance problem remains prominent. The solid-solid interfacial impedance between the electrode and the solid electrolyte is relatively high, which seriously affects ion transport. Interfacial side reactions can also lead to battery performance degradation. The problem of lithium dendrites should not be ignored either. Lithium metal anodes are prone to form lithium dendrites during the cycling process. Once lithium dendrites grow and Pierce the separator, it will cause a short circuit in the battery and lead to serious safety issues. Large-scale production also faces challenges. The production process of solid-state batteries is complex and the cost is high. The existing equipment and technology are difficult to meet the demands of large-scale production. How to develop low-cost and high-efficiency production processes and promote equipment automation and standardization is the key to achieving large-scale production. In terms of material costs, the cost of solid electrolytes and new electrode materials is relatively high. The use of rare metals (such as cobalt and nickel) further increases the cost pressure, which to some extent restricts the large-scale application of solid-state batteries. In addition, the issue of thermal management also needs to be urgently addressed. Solid-state batteries generate a large amount of heat during high-rate charging and discharging. If the heat cannot be effectively dissipated, it will seriously affect the performance and safety of the battery. In terms of cycle life, solid-state batteries may experience capacity attenuation and interface degradation during long-term cycles. It is necessary to optimize the matching of electrode and electrolyte materials and develop long-life interface protection technologies.

(II) Future Development Trends
Looking ahead, solid-state batteries have a clear development direction in terms of energy density, cost reduction and commercial application. In terms of energy density, with the continuous advancement of technology, new materials and structural designs will continue to enhance the energy density of solid-state batteries, which is expected to exceed 500Wh/kg or even higher, providing more powerful power support for fields such as electric vehicles and aerospace. In terms of cost reduction, through material innovation, process optimization and large-scale production, the cost of solid-state batteries will gradually decrease, enhancing their market competitiveness and enabling them to be more widely applied in various fields. In terms of commercial applications, solid-state batteries will continue to expand in fields such as new energy vehicles, energy storage, and consumer electronics. In the field of new energy vehicles, solid-state batteries will help vehicles achieve longer driving ranges, faster charging speeds and higher safety, promoting the further development of the new energy vehicle industry. In the field of energy storage, solid-state batteries will provide more efficient and safe solutions for grid energy storage, distributed energy storage, etc., promoting the large-scale application of renewable energy. In the field of consumer electronics, the application of solid-state batteries will enable electronic products to have longer battery life and thinner designs, enhancing the user experience.

Summary: Solid-state batteries, sailing towards the energy ark of the future

Looking back on 2025, the development of solid-state batteries has been fruitful. From technological breakthroughs to industrialization progress, from market applications to future prospects, solid-state batteries are rewriting the landscape of the energy sector at a rapid pace. Its wide application in fields such as new energy vehicles, consumer electronics, energy storage and low-altitude economy has injected new vitality into the development of these industries and also fills us with expectations for the future energy life.

Although the development of solid-state batteries still faces many challenges, these challenges are precisely the driving force behind technological progress. With the continuous growth of global demand for clean energy, solid-state batteries, as an efficient, safe and environmentally friendly energy storage solution, have unlimited potential for future development. It is believed that with the joint efforts of scientists, engineers and enterprises, solid-state batteries will surely overcome numerous difficulties and embrace an even more brilliant future, achieving all-round development

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