Lateral flow test assay requires integrated micro power sourcesto realize quantitative testing as well as to enhance accuracy. Conventional dry batteries generally havepollution issues for this task, while the recently emerged paper-based fuel cells are both expensive and low-voltage that restrict their usage. In comparison, the metal-air battery (MAB) using a metal anode and an air-breathing cathode could be a much better solution. In this study, different micro metal-air batteries are integrated onto paper substrates, producing micro power sources that are low-cost, high-voltage and environmentally friendly. Their performances are compared under both alkaline and salt electrolytes in terms of power output, fabrication cost and specific energy. Among them, the Al-air battery with an alkaline electrolyte and the Mg-air battery with a salt electrolyte are more advantageous than others, achieving high voltage outputs of 1.55 V and 1.53 V at 1 mA cm⁻², respectively. By using acarbon grid instead of asilver grid as current collector, and nitrogen-doped carbon nanotubesinstead of MnO₂ as oxygen reduction catalyst, the as-fabricated micro MABs can be much cheaper and greener for disposable lateral flow test devices. Finally, a two-cell micro Al-air battery pack, which is integrated into a digital pregnancy tester, provides powersuccessfully for its operation for more than 5 minutes.

中文翻译：

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将微型金属空气电池集成到用于即时护理应用的侧流测试中

横向流动测试分析需要集成微电源来实现定量测试并提高准确性。传统的干电池在这项任务中通常存在污染问题，而最近出现的纸基燃料电池既昂贵又低电压，限制了它们的使用。相比之下，使用金属阳极和吸气式阴极的金属空气电池 (MAB) 可能是更好的解决方案。在这项研究中，不同的微型金属空气电池被集成到纸基板上，生产出低成本、高电压和环保的微型电源。在功率输出、制造成本和比能量方面，它们在碱性和盐电解质下的性能进行了比较。其中，^-2，分别。通过使用碳栅代替银栅作为集流体，并使用氮掺杂碳纳米管代替 MnO ₂作为氧还原催化剂，制造的微型 MAB 对于一次性横向流动测试设备来说可以更便宜、更环保。最后，集成在数字妊娠测试仪中的两芯微型铝空气电池组，可为其运行5分钟以上的成功供电。