Bibliographic Details
| Title: |
CuSbS2 as a negative electrode material for sodium ion batteries. |
| Authors: |
Marino, C.1 Cyril.marino@psi.ch, Block, T.2, Pöttgen, R.2, Villevieille, C.1 Claire.villevieille@psi.ch |
| Source: |
Journal of Power Sources. Feb2017, Vol. 342, p616-622. 7p. |
| Subjects: |
Sodium ions, Alkali metal ions, Ternary phase diagrams, X-ray absorption, Electromagnetic wave absorption |
| Abstract: |
CuSbS 2 was tested as a negative electrode material for sodium-ion batteries. The material synthesized by ball milling offers a specific charge of 730 mAh g −1 , close to the theoretical value (751 mAh g −1 ), over a few cycles. The reaction mechanism was investigated by means of operando X-ray diffraction, 121 Sb Mössbauer spectroscopy, and Cu K-edge X-ray absorption spectroscopy. These studies reveal a sodiation mechanism that involves an original conversion reaction in two steps, through the formation of a ternary phase, CuSb (1−x) S (2−y), as well as a Na x S alloy and Sb, followed by an alloying reaction involving the previously formed Sb. The desodiation process ends with the reformation of the ternary phase, CuSb (1−x′) S (2−y′) , deficient in Sb and S; this phase is responsible for the good reversibility observed upon cycling. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
