Boosting Li3V2(PO4)3 cathode stability using a concentrated aqueous electrolyte for high-voltage zinc batteries

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...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2021-05, Vol.57 (35), p.4319-4322
Main Authors: Li, Cuixia, Yuan, Wentao, Li, Chi, Wang, Huan, Wang, Liubin, Liu, Yongchang, Zhang, Ning
Format: Article
Language:English
Subjects:
Aqueous electrolytes
Cathodes
Electrolytes
Voltage drop
Zinc
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Summary: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.
ISSN:1359-7345
1364-548X
DOI:10.1039/d0cc08115a