Boosting Li<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> cathode stability using a concentrated aqueous electrolyte for high-voltage zinc batteries
Cuixia Li, Wentao Yuan, Chi Li, Huan Wang, Liubin Wang, Yongchang Liu, Ning Zhang
Abstract
We demonstrate that the capacity decay and voltage drop issues of the Li3V2(PO4)3 cathode are significantly addressed by using a concentrated aqueous electrolyte based on Zn and Li salts. The resultant aqueous Zn//Li3V2(PO4)3 battery achieves a high output voltage of 1.75 V and a long lifespan with 82.3% capacity retention over 2000 cycles. Joint structural and spectroscopic characterizations reveal that this battery operates through Li+ (de)intercalation into the cathode along with Zn2+ plating/stripping at the anode.
Topics & Concepts
Aqueous solutionElectrolyteCathodeChemistryElectrochemistryInorganic chemistryZincAnalytical Chemistry (journal)Materials scienceElectrodePhysical chemistryChromatographyOrganic chemistryAdvanced battery technologies researchAdvanced Battery Materials and TechnologiesAdvancements in Battery Materials