SBIR Phase I: Sodium-Based All-Solid-State Batteries for Stationary Energy Storage

小型企业创新研究(SBIR)第一阶段项目的更广泛影响将涉及降低采用可再生能源发电和能源储存的门槛。与最先进的锂材料相比，该项目寻求利用钠材料的绝对丰富和低成本。这将减少前期能源存储成本，进而可以显著减少最终用户的投资回收期和电力成本。美国拥有230亿吨国内钠储备，占全球钠供应的88%。在新的电池技术中成功利用美国巨大的钠储备，将大大减少对关键材料的进口依赖，并缓解供应链对锂基材料的限制。该项目将加快太阳能和可再生能源发电的采用，使电网更清洁、更可持续、更具弹性。该研究项目推动了由新型卤化物基钠固态电解液实现的新型电池。与传统的锂离子电池相比，该技术提供了几个有益的特性：由于使用完全不可燃的材料而提高了安全性，通过使用致密的合金基负极提高了体积能量密度，由于钠基原材料的丰富而降低了成本，并且由于使用了优质的卤化物基固态电解液而延长了寿命。与通常使用的硫化物或氧化物固体电解质材料不同，基于卤化物的创新提供了增强的电化学和化学稳定性，同时消除了制造过程中的高温烧结需求。该项目开发了卤化物固体电解质材料，将其基准材料的离子传导性提高了1-2个数量级，并探索了在室温下使用单步制造的可扩展合成路线。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

The broader impact of this Small Business Innovation Research (SBIR) Phase I project will involve lowering the barrier to adoption of renewable energy generation and energy storage. The project seeks to take advantage the sheer abundance and low costs of sodium materials compared to state-of-the-art lithium materials. This will reduce upfront energy storage cost and in turn the payback time and costs of electricity for end users can be significantly reduced. The United States has 23 billion tons of domestic sodium reserves, which makes up 88% of the global supply of sodium. Successful utilization of the vast U.S. sodium reserves in new battery technologies will significantly reduce import reliance of critical materials and alleviate supply chain limitations on lithium-based materials. This project will accelerate the adoption of solar and renewable energy generation, making the grid cleaner, more sustainable, and more resilient.This research project advances new batteries enabled by a novel halide-based sodium solid state electrolyte. The technology offers several beneficial properties compared with conventional lithium-ion batteries: enhanced safety due to the use of completely nonflammable materials, higher volumetric energy density by using a dense alloy-based anode, lowered costs due to the abundance of sodium-based raw materials, and improved longevity from the use of superior halide-based solid-state electrolytes. Unlike the commonly used sulfide-based or oxide-based solid electrolyte materials, the halide-based innovation provides enhanced electrochemical and chemical stability while eliminating the need for high temperature sintering during fabrication. This project develops the halide solid electrolyte material, improving its baseline material ionic conductivity by 1-2 orders of magnitude, as well as exploring scalable synthesis routes using single-step fabrication at room temperature.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.