Triboelectrification between a liquid and a solid is a common phenomenon in our daily life and industry. Triboelectric charges generated at liquid/solid interfaces have effects on energy harvesting, triboelectrification-based sensing, interfacial corrosion, wear, lubrication, etc. Knowing the amount of triboelectric charge transfer is very useful for studying the mechanism and controlling these phenomena, in which an accurate method is absolutely necessary to measure the triboelectric charge generated at the solid—liquid interface. Herein, we established a method for measuring the charge transfer between different solids and liquids. An equipment based on the Faraday cup measurement was developed, and the leakage ratio (r_l) was quantified through simulation based on an electrostatic field model. Typical experiments were conducted to validate the reliability of the method. This work provides an effective method for charge measurement in triboelectrification research.

液体和固体之间的摩擦起电是我们日常生活和工业中的常见现象。在液体/固体界面产生的摩擦电荷对能量收集、基于摩擦起电的传感、界面腐蚀、磨损、润滑等有影响。了解摩擦电荷转移量对于研究机制和控制这些现象非常有用，其中一个准确的方法对于测量在固-液界面产生的摩擦电荷是绝对必要的。在此，我们建立了一种测量不同固体和液体之间电荷转移的方法。开发了一种基于法拉第杯测量的设备，泄漏比 ( r _l) 通过基于静电场模型的模拟进行量化。进行了典型实验以验证该方法的可靠性。这项工作为摩擦起电研究中的电荷测量提供了一种有效的方法。