Ligon Samuel Clark, Bay Marie-Claude, Heinz Meike V F, Battaglia Corsin, Graule Thomas, Blugan Gurdial
Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Science and Technology, Ueberlandstrasse 129, 8600 Duebendorf, Switzerland.
Materials for Energy Conversion, Empa, Swiss Federal Laboratories for Materials Science and Technology, Ueberlandstrasse 129, 8600 Duebendorf, Switzerland.
Materials (Basel). 2020 Jan 16;13(2):433. doi: 10.3390/ma13020433.
Large diameter (> 100 mm) planar Na-β″-AlO solid electrolytes (BASE) with thickness from 1.0 to 1.5 mm have been prepared. Na-β″-AlO was processed as a slurry and cast to give several meters of tape. One hundred and forty mm diameter discs were punched from the tape, stacked, and laminated with a large hydraulic press. Binder burnout and sintering were performed in 150 mm diameter MgO spinel encapsulations to mitigate the loss of NaO vapor. Conductivity and flexural strength were measured on smaller Na-β″-AlO samples produced via the same tape casting process followed by sintering and gave results consistent with BASE materials produced by uniaxial pressing of powders. Planar BASE membranes enable new cell designs, which are predicted to have higher power densities and better stacking efficiency compared to currently manufactured tubular cells.
已经制备出了厚度为1.0至1.5毫米、直径大于100毫米的平面钠-β″-氧化铝固体电解质（BASE）。钠-β″-氧化铝被制成浆料并浇铸以得到数米长的带材。从带材上冲压出直径为140毫米的圆盘，堆叠起来，并用大型液压机进行层压。在直径为150毫米的氧化镁尖晶石封装中进行粘合剂烧除和烧结，以减轻NaO蒸汽的损失。对通过相同的流延成型工艺随后烧结制备的较小的钠-β″-氧化铝样品测量了电导率和抗弯强度，结果与通过粉末单轴压制生产的BASE材料一致。平面BASE膜能够实现新的电池设计，预计与目前制造的管状电池相比，具有更高的功率密度和更好的堆叠效率。
