Carbon anchored titanium carbonitride for supercapacitor electrode material was prepared by a direct semi-solid-sate carbonitridation method. The prepared sample is highly conductive and mesoporous (250 m(2) g(-1)), enabling fast electron transfer and ion transport. As a result, a high capacitance of 360 F g(-1) at 0.5 A g(-1), and an impressive capacitance retention ratio 100Ag(-1)/1 Ag-1 of 53%, as well as long cyclic capability (>10,000 cycles) can be obtained in 1 MH2SO4. The thick electrode also presents a high area capacitance up to 1.77 F cm(-2). A flexible H2SO4/PVA symmetric supercapacitor was fabricated to demonstrate its practicality. Remarkably, the supercapacitor presents high-rate performance (up to 25 kW kg(-1)) and long cyclic performance (>10,000 cycles), illustrating its potential application in flexible integrated energy storage devices. This work provides a novel insight into designing and preparing carbonitride based materials for high performance supercapacitor. (C) 2019 Elsevier Ltd. All rights reserved.