The　potential　of　C3N　nanoribbons　used　as　anode　material　for　lithium-ion　batteries　has　been　systematically　investigated　through　first-principles　calculations.　The　results　suggest　that　C3N　nanoribbons　have　excellent　mechanical　properties　(stiffness　ranging　from　286.28　to　412.69　Nm(-1))　and　good　electronic　conductivity　(with　a　bandgap　of　0-0.31　eV).　Further　studies　reveal　that　the　H-passivated　C3N　nanoribbons　have　high　Li　insertion　capacity　(708.60　mAhg(-1))　and　significantly　enhanced　Li　binding　strength　(0.21-2.11　eV)　without　the　sacrifice　of　Li　mobility.　The　high　stiffness,　superior　cycle　performance,　good　electronic　conductivity,　and　excellent　Li　migration　capability　indicate　the　great　potential　of　C3N　nanoribbons　to　be　an　anode　material.　The　calculated　results　provide　the　valuable　insights　for　the　development　of　high-performance　C3N　nanoribbons　electrode　materials　in　lithium-ion　batteries.　(C)　2020　Elsevier　B.V.　All　rights　reserved.