Investigation of CrSi2 and MoSi2 as anode materials for lithium-ion batteries
2011; Elsevier BV; Volume: 202; Linguagem: Inglês
10.1016/j.jpowsour.2011.11.047
ISSN1873-2755
AutoresFabrice M. Courtel, Dominique Duguay, Yaser Abu‐Lebdeh, Isobel Davidson,
Tópico(s)Semiconductor materials and devices
ResumoWe report on the suitability of the two metal silicides MoSi2 and CrSi2 as anode materials for Li-ion batteries. The two materials were synthesized by high energy ball milling of the corresponding metals and X-ray diffraction was used to follow the evolution/formation of the crystalline phases. The in-house prepared powders have shown better battery performance than commercial powders (as-received or ball-milled). We observed that 20 h were necessary for the formation of MoSi2 whereas 100 h were needed for the formation of the CrSi2 powder. The best battery performance was obtained with the synthesized CrSi2 powder that has a theoretical capacity value of 469 mAh g−1. This powder provided capacities of 340, 262, 167, 110, and 58 mAh g−1 at C/12, C/6, C/2, C, and 2C, respectively. Cycling at 60 °C showed higher capacity values, but with a faster fade of these values.
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