Kakiage Kenji, Yano Toru, Uehara Hiroki, Kakiage Masaki
Environmental & Energy Materials Laboratory, ADEKA CORPORATION, Arakawa-ku, Tokyo, Japan.
Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu, Gunma, Japan.
Commun Eng. 2024 Nov 25;3(1):177. doi: 10.1038/s44172-024-00321-1.
Lithium-sulfur (Li-S) rechargeable batteries have been expected to be lightweight energy storage devices with the highest gravimetric energy density at the single-cell level reaching up to 695 Wh kg, having also an ultralow rate of 0.005 C only in the first discharge. Sulfurized polyacrylonitrile (SPAN) is one of the sulfur-based active materials, which allows more freedom in the Li-S cell design because it shows no undesirable reactions with electrolyte solutions. Here we present an original Li-S pouch cell construction, ADEKA's Lithium-Sulfur/Pouch Cell (ALIS-PC). It is an ultra-lightweight rechargeable battery cell, which is designed by combining the SPAN cathode and effective ten technologies involving chemical engineering. As a result, the highest gravimetric energy densities of 713 and 761 Wh kg after some charge-and-discharge cycles, which were based on the total mass of all cell components, were achieved with successful operating at 0.1 and 0.05C-rates, respectively, significantly exceeding those of commercial lithium-ion and next-generation rechargeable batteries in development.
锂硫（Li-S）可充电电池有望成为重量轻的储能设备，其单电池水平的最高重量能量密度可达695 Wh/kg，且仅在首次放电时具有0.005 C的超低倍率。硫化聚丙烯腈（SPAN）是硫基活性材料之一，由于它与电解质溶液不发生不良反应，因此在锂硫电池设计中具有更大的自由度。在此，我们展示了一种原创的锂硫软包电池结构，即ADEKA的锂硫/软包电池（ALIS-PC）。它是一种超轻的可充电电池，通过将SPAN阴极与涉及化学工程的有效十种技术相结合而设计。结果，基于所有电池组件的总质量，在经过一些充放电循环后，分别在0.1 C和0.05 C倍率下成功运行时，实现了713和761 Wh/kg的最高重量能量密度，显著超过了正在开发的商用锂离子电池和下一代可充电电池。
