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Aqueous batteries based on mixed monovalence metal ions: a new battery family.

Authors
  • Chen, Liang
  • Zhang, Leyuan
  • Zhou, Xufeng
  • Liu, Zhaoping
Type
Published Article
Journal
ChemSusChem
Publisher
Wiley (John Wiley & Sons)
Publication Date
Aug 01, 2014
Volume
7
Issue
8
Pages
2295–2302
Identifiers
DOI: 10.1002/cssc.201402084
PMID: 24798797
Source
Medline
Keywords
License
Unknown

Abstract

As existing battery technologies struggle to meet the requirements for widespread use in the field of large-scale energy storage, new concepts are urgently needed to build batteries with high energy density, low cost, and good safety. Here, we demonstrate two new aqueous batteries based on two monovalence metal ions (Li(+) /K(+) and Na(+) /K(+) ) as charge-transfer ions, Ni1 Zn1 HCF/TiP2 O7 and Ni1 Zn1 HCF/NaTi2 (PO4 )3 . These new batteries are unlike the conventional "rocking-chair" aqueous metal-ion batteries based on the migration of one type of shuttle ion between cathode and anode. They can deliver specific energy of 46 Wh kg(-1) and 53 Wh kg(-1) based on the total mass of active materials; this is superior to current aqueous battery systems based on sodium-ion and/or potassium-ion technologies. These two new batteries together with the previously developed Li(+) /Na(+) mixed-ion battery not only constitute a new battery family for energy storage, but also greatly broaden our horizons for battery research.

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