Nature CommunicationsCoulombic surface dipole trapping ionomer for efficient proton exchange membrane fuel cellsSiyuan WangFanpeng KongZhengyang BaoXiaozhi ZhaoLei ZhangZhongxin SongJunjie LiLei DuYongjun XuBo ZhaoGeping YinXueliang Sun2026-09-01Full textDOI https://doi.org/10.1038/s41467-026-74391-4