Ti＜sub＞3＜/sub＞C＜sub＞2＜/sub＞T　＜sub＞x＜/sub＞　(MXene)　exhibits　attractive　properties　in　different　applications.　However,　traditional　synthesis　leads　to　unsatisfactory　yield　of　two-dimensional　(2D)　Ti＜sub＞3＜/sub＞C＜sub＞2＜/sub＞T　＜sub＞x＜/sub＞,　e.g.,　lower　than　20%,　which　stems　from　the　strong　interactions　of　potential　Ti-Ti　bonds　and　residual　Ti-Al　bonds　between　the　adjacent　Ti＜sub＞3＜/sub＞C＜sub＞2＜/sub＞　layers,　hindering　the　effective　intercalation　and　delamination.　Herein,　we　propose　a　facile　hydrothermal-assisted　intercalation　(HAI)　strategy　to　boost　the　yield　of　2D　sheets,　achieving　a　record　high　value　of　74%.　This　HAI　assists　the　diffusion　and　intercalation　of　reagent　effectively,　promoting　the　subsequent　delamination;　meanwhile,　an　antioxidant　is　applied　to　protect　these　Ti＜sub＞3＜/sub＞C＜sub＞2＜/sub＞T　＜sub＞x＜/sub＞　from　oxidation　during　the　HAI　process.　Therefore,　massive　Ti＜sub＞3＜/sub＞C＜sub＞2＜/sub＞T　＜sub＞x＜/sub＞　2D　sheets　can　be　easily　synthesized.　Thanks　to　the　synergistic　effect　of　high　conductivity　and　substantial　terminated　functionalities,　these　Ti＜sub＞3＜/sub＞C＜sub＞2＜/sub＞T　＜sub＞x＜/sub＞　2D　sheets　show　promising　application　in　supercapacitor,　providing　a　high　capacitance　of　482　F　g＜sup＞-1＜/sup＞.　Besides,　the　ultrafast　carrier　dynamics　results　of　Ti＜sub＞3＜/sub＞C＜sub＞2＜/sub＞T　＜sub＞x＜/sub＞　2D　sheets　clearly　imply　the　promising　application　in　photocatalysis　due　to　the　relatively　long　bleaching　relaxation　time.　Our　work　not　only　paves　the　way　for　the　mass　production　of　Ti＜sub＞3＜/sub＞C＜sub＞2＜/sub＞T　＜sub＞x＜/sub＞　2D　sheets　but　also　provides　insights　into　their　electronic　and　optical　properties.