SOLID-STATE LITHIUM METAL BATTERY WITH IN SITU HYBRID ELECTROLYTE (SEATBELT)

到2025年，基于硅/碳（4a代）和锂金属（4 b代）阳极的新一代锂电池将取代目前的锂离子设备，其中易燃的液体电解质被不易燃的固体电解质取代。然而，预计只有全固态4 b锂电池才能满足电动汽车和固定应用所需的电池重量能量密度规格。因此，SEATBELT的目标是在2026年之前建立一个围绕成本效益高、坚固耐用的全固态锂电池的欧盟本地产业。SEATBELT旨在实现第一个技术里程碑，开发满足电动汽车（EV）和固定行业需求的电池（TRL 5）。低成本的安全带电池采用可持续和可回收的材料，设计安全，到2026年达到高能量密度（>380 Wh/kg）和长循环能力（>500次循环），符合欧盟2030年的目标。电池通过低成本无溶剂挤出工艺生产，包括创新材料的组合：薄锂金属，混合电解质，无关键材料的安全阴极活性材料和薄铝集电器。通过界面（操作和原子建模）和过程（机器学习）方法优化单元设计。此外，还将开发新的原位成像仪器，以研究安全性能和机械变形，从而评估真实的条件下的细胞安全性。还将建立从材料到电池水平的创新回收循环。因此，SEATBELT将成为欧盟第一个全固态电池价值链的起点，其RTD和工业部门的主要参与者都在该联盟内。因此，电池和模块将使用专用于EV和固定应用的工业相关协议进行循环。SEATBELT财团由来自7个欧洲国家的14个受益合作伙伴和3个附属实体以及一个联系合作伙伴组成，总预算为7851448.50欧元。

As of 2025, new generations of Li batteries based on silicon/carbon (Gen. 4a) and Li metal (Gen. 4b) anode, where flammable liquid electrolyte is replaced by a non-flammable solid-one, will take over the current Li-ion device. However, only all-solid-state Gen. 4b Li batteries are expected to fulfil the needed cell gravimetric energy density specifications demanded by electromobility and stationary applications. Therefore, SEATBELT ambition is to generate a local EU industry that revolves around a cost-effective, robust all-solid-state Li battery comprising sustainable materials by 2026. SEATBELT intends to achieve the first technological milestone of developing a battery cell (TRL5) meeting the needs of Electric Vehicle (EV) and stationary industry. The low-cost SEATBELT cell is safe-by-design with sustainable and recyclable materials, reaching high energy densities (>380 Wh/kg) and long cyclability (>500 cycles) by 2026 in line with the 2030 EU targets. The cells are produced by low-cost solvent-free extrusion process comprising a combination of innovative materials: thin Li metal, hybrid electrolyte, a safe cathode active material without critical materials and thin Al current collector. The cell design being optimized by interface (operando and atomistic modelling) and process (machine learning) methodologies. In addition, new in situ imaging instrumentation will be developed to investigate safety properties and mechanical deformation to assess cell safety in real conditions. An innovative recycling cycle from materials to cell level will be also established. Thus, SEATBELT will be the start point of a first EU all-solid-state battery value chain, whose main players in RTD and Industry sectors are within the consortium. So, cells and modules will cycle using industrially relevant protocols dedicated to EV and stationary applications. SEATBELT consortium is composed of 14 beneficiary partners and 3 affiliated entities, and one associated partner, from 7 European countries with an overall budget of 7851448.50€.