biostudies-literatureUnknownOkamoto KNeutron Scattering Program Advisory Committee of IMSS, KEKSynchrotron and neutron radiation experiments were approved by JASRIGrant-in-Aid for Scientific ResearchJST FORESTScientific Research on InnovativeK₂ NiF₄ -type Ba-Li oxyhydride (BLHO) transitions to a so-called hydride superionic conductor, exhibiting a high and essentially temperature-independent hydride ion (H^- ) conductivity over 0.01 S cm^-1 through the disordering of H^- vacancies above 300 °C. In this study, a Ba-Li-Na-H-O oxyhydride system synthesized in which lithium is partially substituted with sodium in BLHO and investigated the effects of Na content on the phase transition behavior and the conductivity. Structural refinements and differential scanning calorimetry experiments confirmed a lowering trend in the phase transition temperatures and decreasing enthalpy changes for the transition with increasing Na content. Substitution of not <40% of Li with Na lowered the degAdvanced science (Weinheim, Baden-Wurttemberg, Germany)e2203541https://www.ebi.ac.uk/biostudies/studies/S-EPMC9811434biostudies-literatureImpact of Na Concentration on the Phase Transition Behavior and H^- Conductivities in the Ba-Li-Na-H-O Oxyhydride System.PMC98114342019A10842016B176717H0614522H045142019S1018H0551619H0471018H055182016A167319K1566117H0549220H028282020A165919K12650JPMJFR213H22K147552018B10992014S102019S06Yonemura MIkeda KSaito TOkamoto KKamiyama TTakeiri FImai YKobayashi GOtomo TfalseImpact of Na Concentration on the Phase Transition Behavior and H^- Conductivities in the Ba-Li-Na-H-O Oxyhydride System.K₂ NiF₄ -type Ba-Li oxyhydride (BLHO) transitions to a so-called hydride superionic conductor, exhibiting a high and essentially temperature-independent hydride ion (H^- ) conductivity over 0.01 S cm^-1 through the disordering of H^- vacancies above 300 °C. In this study, a Ba-Li-Na-H-O oxyhydride system synthesized in which lithium is partially substituted with sodium in BLHO and investigated the effects of Na content on the phase transition behavior and the conductivity. Structural refinements and differential scanning calorimetry experiments confirmed a lowering trend in the phase transition temperatures and decreasing enthalpy changes for the transition with increasing Na content. Substitution of not <40% of Li with Na lowered the deg2022-01-01T00:00:00Z2022 Nov2025-04-04T08:25:05.927Z2025-04-04T08:25:05.927ZS-EPMC98114343638255610.1002/advs.202203541