Manganese hexacyanomanganate open framework as a high-capacity positive electrode material for sodium-ion batteries

Hyun-Wook Lee, Richard Y. Wang, Mauro Pasta, Seok Woo Lee, Nian Liu and Yi Cui ()
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Hyun-Wook Lee: Stanford University
Richard Y. Wang: Stanford University
Mauro Pasta: Stanford University
Seok Woo Lee: Stanford University
Nian Liu: Stanford University
Yi Cui: Stanford University

Nature Communications, 2014, vol. 5, issue 1, 1-6

Abstract: Abstract Potential applications of sodium-ion batteries in grid-scale energy storage, portable electronics and electric vehicles have revitalized research interest in these batteries. However, the performance of sodium-ion electrode materials has not been competitive with that of lithium-ion electrode materials. Here we present sodium manganese hexacyanomanganate (Na2MnII[MnII(CN)6]), an open-framework crystal structure material, as a viable positive electrode for sodium-ion batteries. We demonstrate a high discharge capacity of 209 mAh g−1 at C/5 (40 mA g−1) and excellent capacity retention at high rates in a propylene carbonate electrolyte. We provide chemical and structural evidence for the unprecedented storage of 50% more sodium cations than previously thought possible during electrochemical cycling. These results represent a step forward in the development of sodium-ion batteries.

Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6280

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DOI: 10.1038/ncomms6280

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