Transition　metal　sulfides　are　used　in　the　field　of　supercapacitors　due　to　their　remarkable　electrical　conductivity　and　superior　energy　density.　However,　few　research　has　been　conducted　on　how　the　sulfidation　process　affects　the　structure　and　electrochemical　properties　of　electrodes.　The　nanoneedle　array　Zn-Mn-Co　sulfide　(ZMC-S/NF)　electrode　is　prepared　by　directly　growing　on　nickel　foam　(NF)　via　a　two-step　hydrothermal　technique.　During　the　first　step,　the　Zn-Mn-Co　carbonate　hydroxide　nanoneedle　skeleton　can　be　obtained.　During　the　second　step,　the　nanoneedle　skeletons　are　etched,　and　rough　nanoneedle　arrays　are　created　by　the　introduced　sulfur　ions,i.e.,　the　sulfidation　process.　The　ZMC-S/NF　electrode　exhibits　a　specific　capacity　of　1401.0　C　g−1　at　2　A　g−1.　It　still　has　excellent　rate　performance　with　a　specific　capacity　of　1015.3　C　g−1　at　20　A　g−1.　Moreover,　it　exhibits　excellent　cycling　stability　with　81.9%　capacity　retention　after　10,000　cycles.　ZMC-S/NF　as　the　cathode　and　activated　carbon　(AC)　as　the　anode　are　assembled　to　be　a　hybrid　supercapacitor　(HSC),　which　has　an　energy　density　of　43.4　Wh　kg−1　at　a　power　density　of　700.4　W　kg−1.　The　effect　of　adding　Zn　and　Mn　to　the　Co3S4　on　energy　band　structure　and　density　of　states　during　the　sulfidation　process　is　calculated　by　the　DFT.　The　HSC　devices　constructed　by　two　series-connected　ZMC-S/NF//AC　can　light　a　star　made　by　ten　1.8　V-red　Light　Emitting　Diodes　(LEDs)　for　10　minutes.　©　2024