A Paper-Based Biological Solar Cell
A Paper-Based Biological Solar Cell
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DOI：
10.1177/2472630319875403
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发表时间：
2019-09
期刊：
影响因子：
2.7
通讯作者：
Lin Liu;Seokheun Choi
中科院分区：
文献类型：
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作者：
Lin Liu;Seokheun Choi
一个合并系统，结合paperfluidics和papertronics最近出现了一个简单的，一次性使用，低成本的范例，一次性护理点（POC）诊断应用。独立和自我维持的纸质系统对于在资源有限的环境中提供有效和拯救生命的治疗至关重要。因此，实际的纸基POC系统需要一个现实的和可访问的电源，因为它们的诊断性能和便携性显著依赖于电源的可用性。在许多纸基电池和储能设备中，纸基微生物燃料电池引起了人们的广泛关注，因为细菌可以从这些具有挑战性的地区容易获得的任何类型的有机物中获得电力。然而，这种技术的前景还没有转化为实际的电力应用，因为它的功率持续时间短，这是不足以完全操作这些系统相对较长的时间。在这项工作中，我们首次展示了一种简单而持久的纸基生物太阳能电池，它使用光合细菌作为生物催化剂。细菌的光合作用和呼吸作用通过将光能转化为电能而持续地自我维持发电。凭借高度多孔和导电的阳极和创新的固态阴极，建立在纸基板上的生物太阳能电池产生的最大电流和功率密度分别为65 µA/cm 2和10.7 µW/cm 2，这比传统的微型生物太阳能电池要大得多。此外，由一叠纸制成的3-D容积室中的光合细菌提供了超过5小时的稳定和持久的电力，而来自2-D纸上的异养培养物的电流在几分钟内急剧下降。
A merged system incorporating paperfluidics and papertronics has recently emerged as a simple, single-use, low-cost paradigm for disposable point-of-care (POC) diagnostic applications. Stand-alone and self-sustained paper-based systems are essential to providing effective and lifesaving treatments in resource-constrained environments. Therefore, a realistic and accessible power source is required for actual paper-based POC systems as their diagnostic performance and portability rely significantly on power availability. Among many paper-based batteries and energy storage devices, paper-based microbial fuel cells have attracted much attention because bacteria can harvest electricity from any type of organic matter that is readily available in those challenging regions. However, the promise of this technology has not been translated into practical power applications because of its short power duration, which is not enough to fully operate those systems for a relatively long period. In this work, we for the first time demonstrate a simple and long-lasting paper-based biological solar cell that uses photosynthetic bacteria as biocatalysts. The bacterial photosynthesis and respiration continuously and self-sustainably generate power by converting light energy into electricity. With a highly porous and conductive anode and an innovative solid-state cathode, the biological solar cell built upon the paper substrates generated the maximum current and power density of 65 µA/cm2 and 10.7 µW/cm2, respectively, which are considerably greater than those of conventional micro-sized biological solar cells. Furthermore, photosynthetic bacteria in a 3-D volumetric chamber made of a stack of papers provided stable and long-lasting electricity for more than 5 h, while electrical current from the heterotrophic culture on 2-D paper dramatically decreased within several minutes.