| Čoahkkáigeassu: | Vanadium pentoxide (V<sub>2</sub>O<sub>5</sub>)-anchored single-walled carbon nanotube (SWCNT) composites have been developed through a simple sol–gel process, followed by hydrothermal treatment. The resulting material is suitable for use in flexible ultra-high capacity electrode applications for lithium-ion batteries. The unique combination of V<sub>2</sub>O<sub>5</sub> with 0.2 wt.% of SWCNT offers a highly conductive three-dimensional network. This ultimately alleviates the low lithium-ion intercalation seen in V<sub>2</sub>O<sub>5</sub> itself and facilitates vanadium redox reactions. The integration of SWCNTs into the layered structure of V<sub>2</sub>O<sub>5</sub> leads to a high specific capacity of 390 mAhg<sup>−1</sup> at 0.1 C between 1.8 to 3.8 V, which is close to the theoretical capacity of V<sub>2</sub>O<sub>5</sub> (443 mAhg<sup>−1</sup>). In recent research, most of the V<sub>2</sub>O<sub>5</sub> with carbonaceous materials shows higher specific capacity but limited cyclability and poor rate capability. In this work, good cyclability with only 0.3% per cycle degradation during 200 cycles and enhanced rate capability of 178 mAhg<sup>−1</sup> at 10 C have been achieved. The excellent electrochemical kinetics during lithiation/delithiation is attributed to the chemical interaction of SWCNTs entrapped between layers of the V<sub>2</sub>O<sub>5</sub> nanostructured network. Proper dispersion of SWCNTs into the V<sub>2</sub>O<sub>5</sub> structure, and its resulting effects, have been validated by SEM, TEM, XPS, XRD, and electrical resistivity measurements. This innovative hybrid material offers a new direction for the large-scale production of high-performance cathode materials for advanced flexible and structural battery applications.
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