Abstract:
:The abundance of sodium resources indicates the potential of sodium-ion batteries as emerging energy storage devices. However, the practical application of sodium-ion batteries is hindered by the limited electrochemical performance of electrode materials, especially at the anode side. Here, we identify alkaline earth metal vanadates as promising anodes for sodium-ion batteries. The prepared calcium vanadate nanowires possess intrinsically high electronic conductivity (> 100 S cm-1), small volume change (< 10%), and a self-preserving effect, which results in a superior cycling and rate performance and an applicable reversible capacity (> 300 mAh g-1), with an average voltage of ∼1.0 V. The specific sodium-storage mechanism, beyond the conventional intercalation or conversion reaction, is demonstrated through in situ and ex situ characterizations and theoretical calculations. This work explores alkaline earth metal vanadates for sodium-ion battery anodes and may open a direction for energy storage.The development of suitable anode materials is essential to advance sodium-ion battery technologies. Here the authors report that alkaline earth metal vanadates are promising candidates due to the favorable electrochemical properties and interesting sodium-storage mechanism.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Xu X,Niu C,Duan M,Wang X,Huang L,Wang J,Pu L,Ren W,Shi C,Meng J,Song B,Mai Ldoi
10.1038/s41467-017-00211-5subject
Has Abstractpub_date
2017-09-06 00:00:00pages
460issue
1issn
2041-1723pii
10.1038/s41467-017-00211-5journal_volume
8pub_type
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