材料汇·2025-09-22 15:07Industry Background - The solid-state battery industry is driven by the urgent demand for high-performance batteries in electric vehicles and consumer electronics, with solid-state batteries offering advantages such as higher safety, significantly improved energy density, and fast charging potential [2][3] - Traditional liquid lithium batteries face three main challenges: limited energy density affecting range, safety issues due to flammable liquid electrolytes, and insufficient fast charging performance [8][10][14] Negative Electrode Material Systems - The negative electrode materials in solid-state batteries currently rely on graphite and silicon-carbon, with silicon-based anodes being a significant development direction due to their theoretical capacity being much higher than that of graphite [19][35] - Lithium metal anodes, while facing challenges such as volume expansion and dendrite growth, have the potential to achieve a qualitative leap in energy density, with commercial applications becoming increasingly viable [19][45] Lithium Metal Anode Preparation Methods - The most mature method for lithium metal preparation is the extrusion/rolling method, which involves extracting lithium from ore or brine, followed by electrolysis and rolling to achieve the desired thickness [53][54] - New techniques such as electrochemical deposition and liquid phase methods are being explored to overcome thickness limitations and improve uniformity in lithium metal anodes [57][59] Market Size and Growth Potential - The global lithium-ion battery shipment is projected to reach 1545.1 GWh in 2024, with the power battery segment accounting for 1051.2 GWh, indicating a rapid growth trajectory in the market [22] - The development of low-altitude economy and humanoid robots is expected to significantly boost the demand for solid-state batteries, as traditional liquid batteries cannot meet the energy density and safety requirements [24][28] Solid-State Battery Advantages - Solid-state batteries can achieve energy densities exceeding 500 Wh/kg, far surpassing the liquid battery limit of 300 Wh/kg, thus enhancing the range of electric vehicles and reducing charging frequency [19][21] - The solid-state electrolyte eliminates the risks associated with liquid electrolytes, such as leakage and combustion, thereby significantly improving battery safety [19][21] Industry Trends and Future Directions - The transition from semi-solid to all-solid-state batteries is underway, with semi-solid batteries serving as a bridge technology while full solid-state batteries are being developed to address existing technical challenges [30][34] - The industry is focusing on overcoming technical bottlenecks and high costs associated with solid-state batteries, including low ionic conductivity and poor solid-solid contact interface performance [32][34]