In　this　study,　we　synthesize　Li13.9Sr0.1Zn(GeO4)(4)　(LSZG)　electrolyte　materials　using　the　sol-gel　method.　The　x-ray　powder　diffraction　results　indicate　that　the　pure　LSZG　material　was　successfully　obtained　using　the　sol-gel　method.　The　scanning　electron　microscopy　(SEM)　results　show　that,　unlike　LSZG-SS　(solid-state)　powder,　LSZG-SG　(sol-gel)　powder　has　smaller　size,　which　promotes　sintering　and　reduces　the　sintering　temperature.　In　addition,　it　is　verified　that　LSZG　electrolyte　can　conduct　Li+/H+　ion　exchange　in　a　humid　H+　environment.　Unlike　the　LSZG-SS　sample,　the　LSZG-SG　electrolyte　can　promote　the　Li+/H+　ion　exchange　and　has　a　higher　proton　conductivity.　The　BaZr0.4Ce0.4Y0.1Ni0.1O3　barrier　layer　coated　on　the　surface　of　LSZG　pellets　can　inhibit　lithium-ion　conduction,　making　the　protons　the　only　mobile　ion.　The　proton　conductivity　of　LSZG-SG　electrolyte　with　a　barrier　layer　is　approximately　0.035　S/cm　at　600　degrees　C.　Furthermore,　solid　oxide　fuel　cells　based　on　LSZG-SG　electrolyte　has　an　open-circuit　voltage　of　1.0　V　and　a　maximum　power　density　of　17　mW　cm(-2)　at　600　degrees　C.　(C)　2021　Elsevier　B.V.　All　rights　reserved.