Laboratory of Electrochemical Engineering (LEE), Department of Chemical Engineering, College of Engineering, University of the Philippines Diliman, Quezon City, 1101, Philippines.
Energy Engineering Program, College of Engineering, University of the Philippines Diliman, Quezon City, 1101, Philippines.
ChemistryOpen. 2021 Apr;10(4):471-476. doi: 10.1002/open.202000168.
Biodegradable primary batteries, also known as transient batteries, are essential to realize autonomous biodegradable electronic devices with high performance and advanced functionality. In this work, magnesium, copper, iron, and zinc - metals that exist as trace elements in the human body - were tested as materials for biomedical transient electronic devices. Different full cell combinations of Mg and X (where X = Cu, Fe, and Zn and the anodized form of the metals) with phosphate buffered saline (PBS) as electrolyte were studied. To form the cathodes, metal foils were anodized galvanostatically at a current density of 2.0 mA cm for 30 mins. Electrochemical measurements were then conducted for each electrode combination to evaluate full cell battery performance. Results showed that the Mg-Cu chemistry has the highest power density at 0.99 mW/cm . Nominal operating voltages of 1.26 V for the first 0.50 h and 0.63 V for the next 3.7 h were observed for Mg-Cu which was discharged at a current density of 0.70 mA cm . Among the materials tested, Mg-Cu exhibited the best discharge performance with an average specific capacity of 2.94 mAh cm , which is comparable to previous reports on transient batteries.
可生物降解的原电池，也称为瞬态电池，对于实现具有高性能和先进功能的自主式可生物降解电子设备至关重要。在这项工作中，镁、铜、铁和锌——这些金属在人体中作为微量元素存在——被测试为生物医学瞬态电子设备的材料。不同的全电池组合，包括 Mg 和 X（其中 X = Cu、Fe 和 Zn，以及金属的阳极氧化形式），与磷酸盐缓冲盐水（PBS）作为电解质进行了研究。为了形成阴极，金属箔在 2.0 mA/cm 的电流密度下进行恒电流阳极氧化 30 分钟。然后对每个电极组合进行电化学测量，以评估全电池电池性能。结果表明，Mg-Cu 化学物质具有最高的功率密度，为 0.99 mW/cm 。在电流密度为 0.70 mA/cm 下放电时，Mg-Cu 的标称工作电压在前 0.50 小时为 1.26 V，在后 3.7 小时为 0.63 V。在所测试的材料中，Mg-Cu 表现出最佳的放电性能，平均比容量为 2.94 mAh/cm ，与之前关于瞬态电池的报告相当。
