Bergmeal-based lithium sulphur battery cathode material as well as preparation and application methods thereof

The invention discloses a bergmeal-based lithium sulphur battery cathode material as well as preparation and application methods thereof. The cathode material uses bergmeal as the skeleton, and elemental sulfur is injected into the bergmeal, so as to obtain sulfur-bearing composite material, and then the sulfur-bearing composite material is coated with a conductive material. By adopting the bergmeal, the dissolution of polysulfide can be reduced and the volume expansion of sulphur during charge-discharge process is restrained, and the cycling performance of lithium sulphur batteries is improved. Conductive material is used for coating, so that the electrical conductivity of material is improved and the capacity of the lithium sulphur batteries is increased. The lithium sulphur battery cathode material is simple in preparation technology, and the bergmeal belongs to natural environmentally-friendly material, and is low in cost and benificla to the industrialization of the lithium sulphur batteries. Meanwhile, the introduction of the bergmeal also promotes the industrial transformation and upgrading of the nonmetallic minerals.