Hierarchical　architecture　of　porous　anatase　TiO2　microspheres　is　obtained　by　a　universal　solvothermal　reaction,　which　can　improve　the　cycling　stability　and　ionic/electronic　transport　properties　in　sodium-ion　batteries　without　further　coating,　carbon　modification,　or　element　doping.　Meanwhile,　through　combining　the　porous　structure　with　an　ether-based　electrolyte,　the　electrochemical　properties　of　this　material　have　been　significantly　enhanced.　A　great　specific　capacity　of　207.3　mA　h　g-1　at　1　C　(168　mA　g-1)　after　250　cycles　can　be　achieved.　Even　at　an　unimaginable　current　density　of　40　C,　an　outstanding　cycle　life　was　achieved　with　a　capacity　of　140.6　mA　h　g-1　over　10000　cycles.　Furthermore,　in　situ　Raman　spectroscopy　and　ex　situ　XRD　pattern　analyses　were　carried　out　to　explore　the　structural　transformation　in　the　first　cycling　process.　©　2020　American　Chemical　Society.