fig5

Figure 5. (A) Rate and (B) long-term cycling performance of Na₂V₆O₁₆·3H₂O. Reproduced with permission under the terms of the Creative Commons Attribution^[99]. Copyright 2020, the Author(s), Springer Nature. (C) Working mechanism and (D) cycling performance of VS₂-GO. Reproduced with permission^[103]. Copyright 2018, Elsevier.