Rechargeable Aqueous Zn2+-Battery with High Power Density and Long Cycle-life
- Univ. of Maryland, College Park, MD (United States); U.S. Army Research Lab., Adelphi, MD (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Univ. of Maryland, College Park, MD (United States)
- U.S. Army Research Lab., Adelphi, MD (United States)
Li-ion batteries (LIBs) are approaching their energy limits imposed by the intercalation chemistry nature. As alternatives, multivalent (MV) chemistries bring both promises and challenges, with the main obstacle being the sluggish diffusion of MV-cations due to their strong electrostatic interaction with host lattices. In this work, we demonstrated that polyanion based robust crystal architecture could enable the ultrafast and reversible Zn2+-intercalation and de-intercalation at a high working voltage. The nominal bivalence of Zn2+ was successfully delocalized by the multiple atoms through the p-d hybridization between the V-d and O-p orbitals, hence the inserted Zn2+ only bears an effective charge of 1.336, rendering its high mobility. The novel aqueous rechargeable 1.7 V Zn/LiV2(PO4)3 cell based on such mechanism delivers a high power density (8000 W/kg at 60 C) comparable to supercapacitors, a high energy density (218 Wh/Kg at 1 C) close to LIBs, with extraordinary long cycle life of 4000 cycles. All of these parameters far exceed any Zn battery reported so far. The cell-level volumetric and specific energy densities of the Zn/LiV2(PO4)3 cell are 320 Wh/L and 150 Wh/kg, respectively, which are even better than the first-generation LIBs. Furthermore, combining with the intrinsic safety of the aqueous chemistry and the wide working temperature range, this cell makes a strong candidate for automotive applications.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Advanced Research Projects Agency - Energy (ARPA-E)
- Grant/Contract Number:
- SC0012704; AR0000389
- OSTI ID:
- 1476764
- Alternate ID(s):
- OSTI ID: 1477130
- Report Number(s):
- BNL-209154-2018-JAAM
- Journal Information:
- Energy & Environmental Science, Vol. 11, Issue 11; ISSN 1754-5692
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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