NbO₂/porous carbon matrix composite material for supercapacitor application is prepared by a facile sugar blowing method. Owing to the unique porous and intergrowth structure, this material possesses effective electron-ion-conductive-network. Thus, it delivers an impressive capacitance of 261 Fg⁻¹ (686 F cm-3) at 1 A g⁻¹ and 175 Fg⁻¹ (460 F cm⁻³) at 50 A g⁻¹ in 1 M H₂SO₄. With a wide potential window of 1.8 V in 1 M Li₂SO₄, it achieves 184 Fg⁻¹ (484 F cm⁻³) at 1 A g⁻¹ and 130 Fg⁻¹ (342 F cm⁻³) at 50 A g⁻¹, respectively. Remarkably, a symmetric two-electrode-cell with this material using 1 M Li₂SO₄ retains its operating voltage of 1.8 V, delivering 18.2 Wh kg⁻¹ (47.9 Wh l⁻¹) at 810 W kg⁻¹ (2130.3 W l⁻¹), and 10.5 Wh kg⁻¹ (27.6 Wh l⁻¹) at 81000 W kg⁻¹ (213030 W l⁻¹), as well as excellent cyclic capability (>10000 cycles). These interesting performance reveals the significant prospect of this material to be utilized in supercapacitors and other electrochemical devices.

通过简便的吹糖法制备用于超级电容器的NbO ₂ /多孔碳基复合材料。由于独特的多孔和共生结构，该材料具有有效的电子离子导电网络。因此，其在1A g ^-1时产生261 Fg ^-1（686 F cm-3）的惊人电容，在1 MH ₂ SO _4中在50 A g ^-1时产生175 Fg ^-1（460 F cm ^-3）。在1 M Li ₂ SO _4中具有1.8 V的宽电位窗口时，在1 A g ^-1和130 Fg ^-1时达到184 Fg ^-1（484 F cm ^-3）（342 F cm ^-3）分别在50 A g ^-1下。值得注意的是，这种材料使用1 M Li ₂ SO ₄的对称双电极电池保持其1.8 V的工作电压，在810 W kg ^-1（2130.3 W l ）的功率下输出18.2 Wh kg ^-1（47.9 Wh l ^-1）。^-1），和10.5瓦千克^-1（27.6瓦时升^-1）在81000公斤w ^ ^-1（213030 W L ^-1），以及优良的循环能力（> 10000次循环）。这些有趣的性能揭示了该材料可用于超级电容器和其他电化学设备的重要前景。