College of General Education, Chosun University, 309 Pilmoon-daero, Dong-gu, Gwangju, 61452, Republic of Korea.
Department of Environment & Energy Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Republic of Korea.
J Nanosci Nanotechnol. 2020 Sep 1;20(9):5765-5770. doi: 10.1166/jnn.2020.17625.
Sulfonated poly(phenylene) oxide (sPPO) polymer is coated in a dopamine hydrochloride solution to prepare a highly durable, low-price polymer membrane for vanadium redox flow batteries (VRFBs). The polydopamine (PDA) coating on the sPPO membrane is confirmed using SEM and EDX analysis. sPPO coated with PDA exhibits decreased proton conductivity due to high resistance. However, VO₂ reducibility tests shows that the chemical stability is improved due to the introduction of the PDA coating layer on the sPPO membrane, which has a chemical structure with poor durability in VO₂ solution under the operating conditions of a VRFB. These results show that this polymer electrolyte membrane based on PDA-coated sPPO is a candidate for application in the long-term operation of VRFBs.
磺化聚（苯醚）氧化物（sPPO）聚合物涂覆在盐酸多巴胺溶液中，以制备用于钒氧化还原流电池（VRFBs）的高耐用、低成本聚合物膜。使用 SEM 和 EDX 分析确认 sPPO 膜上的聚多巴胺（PDA）涂层。由于高电阻，涂覆有 PDA 的 sPPO 表现出质子电导率降低。然而，VO₂还原测试表明，由于 sPPO 膜上引入了 PDA 涂层，化学稳定性得到提高，该 PDA 涂层具有在 VRFB 的工作条件下在 VO₂溶液中耐久性差的化学结构。这些结果表明，基于涂覆有 PDA 的 sPPO 的这种聚合物电解质膜是在 VRFB 的长期运行中应用的候选材料。
