Hydriding/dehydriding　reaction　kinetics　of　metal　hydrides　(MH)　is　an　important　yet　controversial　issue.　In　the　last　few　decades,　numerous　studies　have　been　dedicated　to　elaborate　the　reaction　phenomena　for　various　hydride　materials.　Some　crucial　aspects　sketching　the　physical　picture　of　the　reaction,　e.g.　the　controlling　mechanism,　Avrami　exponent　as　well　as　apparent　activation　energy,　are　frequently　discussed　using　the　solid-state　kinetic　models.　It　is　noted,　however,　that　the　results　show　considerable　disagreement　even　for　the　material　prepared　in　a　single　batch.　From　the　literature　review,　it　appears　that　no　consistent　understanding　on　the　reaction　kinetics　of　hydride　materials　could　ever　be　achieved,　unless　carefully　selected　models　and　appropriate　statistical　processing　techniques　are　used　to　interpret　data　obtained　from　well-designed　experiments.　(C)　2018　Elsevier　B.V.　All　rights　reserved.