Cobalt-nickel　(Co-Ni)　free　Lithium-rich　cathode　material　(1　-　x)Li2MnO3　center　dot　xLiFeO(2)　is　more　environmental　friendly　and　cheaper　than　other　traditional　cathode　materials.　However,　the　complex　synthesis　method　limits　its　large-scale　practical　application.　This　work　explores　a　simple　dry　synthesis　route　to　directly　obtain　0.7Li(2)MnO(3)center　dot　0.3LiFeO(2)　with　good　electrochemical　performance.　Calcination　temperature　is　a　key　factor　controlling　the　phase　growth.　With　the　calcination　temperature　increasing,　the　crystallization　and　ordered　layered　structure　are　improved,　but　the　LiFe5O8　spinel　phase　appears　in　X-ray　diffraction　(XRD)　patterns　from　600　degrees　C.　The　results　of　selected　area　electron　diffraction　(SAED),　element　mapping　(EDS)　and　vibrating　sample　magnetometer　(VSM)　demonstrate　convincingly　the　growth　progress　of　LiFe5O8　as　the　temperature　rises.　The　spinel　phase　deteriorates　the　electrochemical　performance.　Furthermore,　it　is　proved　that　the　crystallization　and　activity　of　Li2MnO3　precursor　are　effective　to　retard　the　formation　of　LiFe5O8　and　enhance　the　electrochemical　performance.　The　sample　calcined　at　600　degrees　C　exhibits　a　high　initial　capacity　above　200　mAh　g(-1),　but　capacity　fades　quickly　to　120　mAh　g(-1)　after　50　cycles　at　0.2　C.　The　sample　calcined　at　650　degrees　C　with　a　little　LiFe5O8　delivers　a　low　initial　capacity　about　160　mAh　g(-1),　but　stabilizes　at　160　mAh　g(-1)　after　50　cycles.　Therefore,　how　to　control　the　formation　of　thermally　stable　phase　LiFe5O8　is　an　important　issue,　and　it　needs　further　investigation　to　achieve　Co-Ni　free　Li-rich　cathode　materials　with　excellent　performance.　Significantly,　the　simple　synthesis　and　acceptable　electrochemical　properties　make　the　practical　application　of　Fe-Mn　based　Li-rich　material　possible.　(C)　2022　Published　by　Elsevier　B.V.