Exploration of p-Na_2C_6H_2O_6-based organic electrode materials for sodium-ion and potassium-ion batteries

摘要

Here, para-disodium-2,5-dihydroxy-1,4-benzoquinone (p-Na2C6H2O6 ) was successfully prepared and evaluated as electrode for sodium-ion and potassium-ion batteries. Benefiting from salinization, p-Na2C6H2O6 delivers a high capacity of 121 mA h g( 1) over 50 cycles at 0.1 C and superior rate and cycling life for SIBs. Besides, when tested in KlBs, a reversible capacity of 190.6 mA h g( 1) was also achieved at 0.1 C. We believe this work could boost the development of other similar organic materials. (C) 2019 Elsevier B.V. All rights reserved.