In　this　study,　a　novel　mixed-cooling　proton　exchange　membrane　fuel　cells　(PEMFCs)　stack　is　proposed　and　fabricated,　which　has　been　specially　tailored　with　an　efficient　mixed　cooling　pathway.　Compared　with　conventional　air-cooled　stacks　and　previous-generation　split-cooling　stacks　equipped　with　micro　heat　pipe　arrays,　the　mixed-cooling　stack　achieves　higher　load　capacity,　improved　power　generation　performance,　and　superior　thermal　performance.　In　addition,　the　mixed-cooling　stack　is　configured　with　fewer　fans,　resulting　in　lower　additional　power　consumption　and　a　more　uniform　voltage　distribution.　The　experimental　results　indicate　that　the　load　capacity　of　the　mixed-cooling　stack　is　14.3　%　higher　than　that　of　the　split-cooling　stack　and　shows　a　71.4　%　increase　compared　to　the　ordinary　air-cooled　PEMFC　stack　of　the　same　specification.　At　the　same　current,　the　net　power　output　of　the　mixed-cooling　stack　is　65.9　W　higher　than　that　of　the　split-cooling　stack.　When　operating　at　30　A,　the　maximum　voltage　difference　for　a　single　cell　within　the　mixed-cooling　stack　is　only　0.100　V,　and　the　voltage　uniformity　index　is　70.2　%　lower　than　that　of　the　split-cooling　stack.　Furthermore,　the　temperature　uniform　index　of　the　mixed-cooling　stack　is　superior　to　that　of　the　split-cooling　stack　under　identical　current　conditions.