NiO-based　flexible　anodes　have　provoked　great　interest　due　to　their　high　theoretical　capacity,　benign　redox　reactivity,　and　chemical　and　thermal　stability.　However,　the　issues　of　their　poor　cyclability,　low　rate　capability,　and　mechanical　instability　limit　their　practical　applications.　To　approach　the　high-performance　flexible　devices,　3D　NiO/TiO2　nanotube　network　arrays　on　flexible　carbon　cloth　substrates　are　fabricated　through　a　simple　two-step,　seed-free　solvothermal　method.　The　ultrathin　NiO　nanosheets　provide　remarkable　charge-discharge　cycle　performance　due　to　their　slight　volume　expansion　during　the　charge-discharge　process.　The　flexible　carbon　cloth　provides　a　conductive　and　bendable　matrix.　TiO2　nanotube　arrays　not　only　deliver　a　fast　electron　transfer　path,　but　also　excellent　mechanical　stability　during　bending.　The　porous　network　architecture　results　in　a　remarkable　reduction　in　the　irreversible　capacity　loss　without　sacrificing　specific　surface　area.　This　unique　structure　creates　a　reversible　capacity　of　592.2　mAh　g(-1)　after　1000　cycles　at　a　current　density　of　200　mA　g(-1),　and　has　a　rate　capacity　of　439　mAh　g(-1)　even　at　high　current　densities　of　2000　mA　g(-1).　Their　full　cells　maintain　excellent　electrochemical　performance　and　mechanical　stability　after　multiple　folds.　The　convenient　synthetic　process　creates　a　window　of　opportunity　for　bringing　flexible,　high-performance　energy　storage　devices　to　markets.　(C)　2020　Elsevier　B.V.　All　rights　reserved.