Power Generation for Wearable Electronics: Designing Electrochemical Storage on Fabrics.
Power Generation for Wearable Electronics: Designing Electrochemical Storage on Fabrics.
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DOI：
10.1109/access.2018.2839078
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Kiourti A
中科院分区：
文献类型：
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作者：
Vilkhu R;Thio WJ;Ghatak PD;Sen CK;Co AC;Kiourti A
我们报道了一类新的具有电化学功能的纺织品，当被导电液体（盐溶液、汗液、伤口液等）润湿时，产生能够为移动中的可穿戴电子设备供电的直流电压和电流水平。与先前报道的发电技术相反，所提出的织物是完全柔性的，感觉和行为像普通衣服，不包括任何刚性组件，并且通过由容易获得的液体润湿来提供DC功率。我们的方法需要印刷的电池单元，由沉积在聚酯织物上的银和锌电极组成，以产生微瓦范围的电力。在10 M NaOH电解液中对单个印刷电池单元放电的电化学表征显示出可重现的结果，持续功率水平为180 μW，持续时间超过3小时。可扩展的DC功率也可以通过经由柔性和导电的E线串联连接多个电池单元来实现。事实上，两个电池单元的串联连接被证明可以将所产生的电压从1.4V提升到2.5V。值得注意的是，这种串联印刷电池布置被示出为在10M NaOH、0.5M NaCl溶液（模拟人类汗液）和Dulbecco磷酸盐缓冲盐水溶液（DPBS）（模拟体液电解质）下成功地为数字温度计供电。总的来说，这项技术预计将对医疗保健、体育、军事和消费者应用等领域具有重大意义。
We report a new class of textiles with electrochemical functions which, when moistened by a conductive liquid (saline solution, sweat, wound fluid, etc.), generate DC voltage and current levels capable of powering wearable electronics on the go. Contrary to previously reported power generation techniques, the proposed fabrics are fully flexible, feel and behave like regular clothing, do not include any rigid components, and provide DC power via moistening by readily available liquids. Our approach entails printed battery cells that are composed of silver and zinc electrodes deposited onto a polyester fabric to generate power in the microwatt range. Electrochemical characterization of the discharge of a single printed battery cell in a 10 M NaOH electrolyte shows reproducible results with a sustained power level of ∼80 μW for over 3 hours. Scalable DC power may also be achieved by connecting multiple battery cells in series via flexible and conductive E-threads. Indeed, a series connection of two battery cells is demonstrated to boost the generated voltage from 1.4 V to 2.5 V. Notably, this in-series printed battery arrangement is shown to successfully power a digital thermometer under both 10 M NaOH, a 0.5 M NaCl solution (mimicking human sweat), and Dulbecco’s Phosphate-Buffered Saline solution (DPBS) (mimicking bodily fluid electrolytes). Overall, the proposed technology is expected to be of utmost significance for healthcare, sports, military, and consumer applications, among others.