Aerospace　and　electric　vehicles　often　require　high　-temperature　piezoelectric　energy　harvesters　(HT-PEHs)　to　power　wireless　sensors　operating　at　temperatures　above　200　degrees　C.　In　this　work,　by　rational　modulation　of　the　phase　composition　of　BiFeO　3　-BaTiO　3　(BF　-BT)　based　on　appropriate　bismuth　content　compensation,　the　temperature　dependences　of　the　piezoelectric　and　insulating　properties　of　selected　materials　and　their　applicability　to　HTPEHs　were　studied.　The　results　show　that　BF-0.30BT　ceramics　located　at　the　morphotropic　phase　boundary　(MPB)　have　both　a　high　energy　harvesting　figure　of　merit　and　good　insulating　characteristics　at　200　degrees　C;　this　combination　of　characteristics　has　not　been　reported　in　other　types　of　lead-free　piezoceramics　to　date.　When　compared　with　equivalent　devices　with　different　compositions,　the　cantilever　beam　-type　HT-PEH　that　was　assembled　with　BF-0.30BT　has　an　excellent　high　-temperature　power　generation　capacity　that　can　not　only　achieve　high-speed　charging　of　commercial　capacitors　and　light　36　light　-emitting　diodes　(LEDs)　at　200　degrees　C,　but　also　demonstrates　satisfactory　high　-temperature　cycling　reliability.　All　these　characteristics　combine　to　demonstrate　that　BF-0.30BT　is　a　promising　lead-free　candidate　material　for　HT-PEH　applications.