磷钨酸燃料电池构建与电池性能

针对传统氢氧质子交换膜燃料电池成本高、储氢运输复杂的问题，提出了直接液体燃料电池(dlfc)。然而，目前用于dlfc的有机小分子燃料存在电化学动力学迟钝和贵金属催化剂易中毒等问题。本文基于磷酸钨酸具有高化学和电化学稳定性、在普通碳材料电极上具有高电化学活性以及通过质子交换膜的低渗透性等优点，论证了其作为dlfc液体燃料的可行性。磷钨酸燃料的应用有效地解决了传统dlfc阳极催化剂成本高、燃料渗透损失严重的问题。磷钨酸燃料电池在电池电压为0.42 V时的峰值功率密度为466 mW cm−2，在电流密度为20 ~ 200 mA cm−2范围内具有良好的稳定性。

Aiming at the issues of high cost and complex hydrogen storage and transportation of traditional hydrogen-oxygen proton exchange membrane fuel cells, Direct Liquid Fuel Cells (DLFC) were proposed. However, current small organic molecule fuels applied in DLFCs suffer from issues including sluggish electrochemical kinetics and the susceptibility of noble metal catalysts to poisoning. In this work, leveraging the advantages of phosphotungstic acid (PTA), i.e., high chemical and electrochemical stability, high electrochemical activity on conventional carbon-based electrodes, and low permeability across proton exchange membranes, its feasibility as a liquid fuel for DLFCs was demonstrated. The application of PTA-based fuel effectively resolves the issues of high anodic catalyst cost and severe fuel permeation loss in traditional DLFCs. The phosphotungstic acid fuel cell delivers a peak power density of 466 mW cm⁻² at a cell voltage of 0.42 V, and exhibits good stability within the current density range of 20 to 200 mA cm⁻².