2017
DOI: 10.1038/s41467-017-00742-x
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Designing solid-liquid interphases for sodium batteries

Abstract: Secondary batteries based on earth-abundant sodium metal anodes are desirable for both stationary and portable electrical energy storage. Room-temperature sodium metal batteries are impractical today because morphological instability during recharge drives rough, dendritic electrodeposition. Chemical instability of liquid electrolytes also leads to premature cell failure as a result of parasitic reactions with the anode. Here we use joint density-functional theoretical analysis to show that the surface diffusi… Show more

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Cited by 317 publications
(252 citation statements)
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“…However, after five cycles at al ow current density (0.1 mA cm À2 ), the interfacial resistance of the latter cells is seen to reduce significantly,byabout 10 times.The high interfacial resistance initially observed is consistent with the blockage of direct electrolyte access to the Li electrode.T he fact that the cell without initial conditioning has the same interfacial resistance as the control cell is also unsurprising because it is known that Li metal forms anative coating of oxides and carbonates even with slightest exposure of organic solvent and oxygen (even inside the glove box). As previously reported, [31] the lower interfacial activation energy reflects the reduced diffusion barrier for surface transport of Li ad-atoms on the In surface. Va lues of activation energy B,are given in Table S2.…”
Section: Angewandte Chemiesupporting
confidence: 80%
“…However, after five cycles at al ow current density (0.1 mA cm À2 ), the interfacial resistance of the latter cells is seen to reduce significantly,byabout 10 times.The high interfacial resistance initially observed is consistent with the blockage of direct electrolyte access to the Li electrode.T he fact that the cell without initial conditioning has the same interfacial resistance as the control cell is also unsurprising because it is known that Li metal forms anative coating of oxides and carbonates even with slightest exposure of organic solvent and oxygen (even inside the glove box). As previously reported, [31] the lower interfacial activation energy reflects the reduced diffusion barrier for surface transport of Li ad-atoms on the In surface. Va lues of activation energy B,are given in Table S2.…”
Section: Angewandte Chemiesupporting
confidence: 80%
“…An artificial SEI can be constructed on Na anodes via a chemical reaction ( Figure a) . For example, through the reaction of Na with 1‐bromopropane, a thin layer of NaBr was coated on a Na anode (Figure b) . The NaBr‐protected Na metal anode showed a low diffusion barrier for interfacial ion transport, which is beneficial for uniform Na plating.…”
Section: Strategies For Efficient Use Of Na Metal Anodesmentioning
confidence: 99%
“…[16] In light of this,weimmersed Na electrode in diglyme electrolyte with 0.067 m PS to form apassivation layer on Na surface.The symmetric cell with two identical PS-treated (PT) Na electrodes displayed as table voltage profile over 400 cycles (Figure 4a). Archersgroup reported the use of bromopropane to pre-stabilize Na surface.…”
Section: Angewandte Chemiementioning
confidence: 99%