Correction to: Investigation of Alkali-Ion (Li, Na, and K) Intercalation in KxVPO4 F(x ~ 0) Cathode

This work compares the intercalation of K, Na, and Li in KxVPO4F (x~0). The KxVPO4F (x~0) cathode delivers reversible capacities of ≈90-100 mAh g-1 in K, Na, and Li cells, at an average voltage of ≈4.33 V for K, ≈3.98 V for Na, and ≈3.96 V for Li. This is so far the highest average voltage known for...

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Bibliographic Details
Published in:Advanced functional materials 2019-10, Vol.29 (43)
Main Authors: Kim, Haegyeom, Ishado, Yuji, Tian, Yaosen, Ceder, Gerbrand
Format: Article
Language:English
Subjects:
Batteries
Cathodes
ENERGY STORAGE
Lithium
Potassium
Sodium
Online Access:Get full text
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Summary:This work compares the intercalation of K, Na, and Li in KxVPO4F (x~0). The KxVPO4F (x~0) cathode delivers reversible capacities of ≈90-100 mAh g-1 in K, Na, and Li cells, at an average voltage of ≈4.33 V for K, ≈3.98 V for Na, and ≈3.96 V for Li. This is so far the highest average voltage known for a K-intercalation cathode. The lower voltage of Li insertion compared to Na is attributable to undercoordinated Li ions in the KxVPO4F (x~0) framework. While the material shows high rate capability for all the alkali ions, Li migration in KxVPO4F (x~0) is more difficult than with Na and K. Here, this work suggests that a large cavity is not always good for insertion of alkali ions and cathode materials need to be suitably tailored to each intercalating ion species.
ISSN:1616-301X
1616-3028