fig5
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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.