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US 11,958,759 B2Granted
Ternary oxide based composite cathode material for lithium-sulfur battery and preparation method thereof
AssigneeNankai University
InventorsXueping Gao, Lu Wang, Guoran Li, Sheng Liu
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Abstract
A ternary oxide based composite cathode material for a lithium-sulfur battery and a preparation method thereof are provided wherein the composite cathode material includes: sulfur and LiNi0.8Co0.15Al0.05O2 or LiNixCoyMn1-x-yO2 (0<x<1, 0<y<1, 0<x+y<1), wherein a sulfur content is 50 wt. %-80 wt. %. The host has adsorption and catalytic effects on polar polysulfides, which can fix sulfur and promote electrochemical reactions, thereby preparing lithium-sulfur battery with high capacity and high stability.
Claims1
A ternary oxide based composite cathode material, for a lithium-sulfur battery, comprising:
- sulfur and LiNi0.8Co0.15Al0.05O2 or LiNixCoyMn1-x-yO2 (0<x<1, 0<y<1, 0<x+y<1) as a host, wherein a sulfur content is 50 wt. %-80 wt. %;
- wherein the LiNixCoyMn1-x-yO2 has a layered structure, which is a secondary particle formed by accumulating primary particles;
- the secondary particles are spherical with a diameter of 2-25 μm;
- the LiNixCoyMn1-x-yO2 has a specific surface area of 10.0-100 m2 g−1, and a tap density of 2.0-2.6 g cm−3.
1 more element
Dependencies are inferred from the claim text.