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Porous hollow spherical Mg0.6Ni0.4O/S composite as cathode material for Li–S batteries.
- Source :
-
Journal of Alloys & Compounds . Jun2018, Vol. 749, p594-598. 5p. - Publication Year :
- 2018
-
Abstract
- Porous hollow Mg 0.6 Ni 0.4 O has been fabricated by simple solvothermal method and removed the template by calcining. Afterward, taking advantage of liquid infiltration method, we have successfully synthesized hollow Mg 0.6 Ni 0.4 O/S as positive material for Li-S battery with a sulfur loading of 59.9 wt%. Porous hollow structure not only promoted the electron transfer, but also mitigated the expansion of element sulfur in the process of charging and discharging. Under a current density of 200 mA g −1 , the reversible capacity was up to 912 mAh g −1 after 65 cycles with a high rate performance, coulombic efficiency and a capacity retention of 98%. Especially, at a higher current density of 4000 mA g −1 , the reversible capacity maintained at 174.5 mAh g −1 after 500 cycles. The excellent electrochemical performance was owe to Mg 0.6 Ni 0.4 O alleviating polysulfide dissolution in electrolyte and had unique catalytic effect on the Li/S redox reactions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 749
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 129072693
- Full Text :
- https://doi.org/10.1016/j.jallcom.2018.03.304