高温Na-Zn电池的中子成像：对电池设计和制造的意义
Neutron imaging of high-temperature Na-Zn Cells: implications for cell design and fabrication
AI总结：
该研究通过中子射线成像技术观察高温Na-Zn电池，发现制造过程中产生的截留气泡会显著增加欧姆电阻并干扰电池运行，指出需改进隔膜设计或制造工艺以抑制气泡形成。
摘要：
采用钠和锌电极以及氯化物盐电解质的电化学电池，在循环过程中通过中子射线成像进行了成像。使用此类丰富的原材料赋予了Na-Zn系统极低的能量归一化成本，但其运行要求它们完全熔融，因此需在600 °C下运行。为抑制这种全熔融配置导致的自放电，使用多孔陶瓷隔膜对电解质进行分隔，从而阻碍导致自放电的Zn2+离子向Na电极移动。中子图像揭示了截留在这些隔膜下方的大型气泡，这些气泡是在电池制造过程中由于电解质熔化/固化伴随的巨大体积变化而形成的。循环数据证实，这些气泡通过大幅增加欧姆电阻干扰了电池运行。它们表明需要一种新的隔膜设计，或者一种从一开始就能防止气泡形成的电池制造工艺。
英文摘要：
Electrochemical cells employing Sodium (Na) and Zinc (Zn) electrodes and a chloride salt electrolyte have been imaged by neutron radiography during cycling. The use of such abundant raw materials confers a very low energy-normalised cost to the Na-Zn system, but its operation requires them to be entirely molten, and therefore to be operated at 600 °C. To suppress the self-discharge that results from this all-molten configuration, porous ceramic diaphragms are used to partition the electrolyte and thereby impede the movement of the Zn2+ ions responsible towards the Na electrode. Neutron images reveal large gas bubbles trapped beneath these diaphragms, formed during the cell fabrication process due to the large volume change that accompanies melting/solidifying of the electrolyte. Cycling data confirm that these bubbles interfere with cell operation by substantially increasing ohmic resistance. They indicate the need for either a new diaphragm design, or a cell fabrication process that prevents their formation in the first instance.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
