Designing　SnO2/carbon　composites　is　an　effective　strategy　to　improve　the　conductivity　and　buffer　the　volume　expansion　of　SnO2.　However,　it　remains　a　challenge　to　combine　SnO2　and　carbon　materials　tightly　as　a　stable　integration.　Herein,　a　facile　and　versatile　strategy　of　Sn/SnO2　nanodots　anchored　tightly　into　carbon　nanofibers　(CNFs)　with　the　decoration　of　graphene　quantum　dots　(GQDs)　for　high　perfor-mance　supercapacitor　is　reported.　Through　a　simple　electrospinning　and　carbonization　reduction　pro-cess,　a　novel　multidimensional　carbon　skeleton　of　GQD/CNF　effectively　improves　the　conductivity,　and　importantly,　abundant　Sn-O-C　covalent　bonds　are　constructed　to　anchor　SnO2　nanodots　tightly　into　GQD/CNF,　suppressing　SnO2　aggregation　and　facilitating　electron/ion　transfer　kinetics.　Consequently,　as　self-supporting　and　binder-free　electrode　material,　Sn/SnO2/GQD/CNF　displays　high　specific　capacitance　of　168.6　mA　h　g(-1)　(1349　F　g(-1))　at　1　A　g(-1)　with　excellent　rate　capability　(88.9%　retention　at　20　A　g(-1)).　Furthermore,　a　flexible　solid-state　asymmetric　supercapacitor　based　on　Sn/SnO2/GQD/CNF　and　GQD/CNF　achieves　a　high　energy　density　of　32.3　W　h　kg(-1)　at　a　power　density　of　800　W　kg(-1)　with　remarkable　flexibility　and　cycling　stability　(86.1%　retention　after　5000　cycles).　The　excellent　electrochemical　per-formances　demonstrate　that　this　novel　carbon　skeleton　anchored　active　materials　shows　great　potential　for　electrochemical　energy　storage　applications.(C)　2022　Elsevier　Ltd.　All　rights　reserved.