• 专利标题:   Self-supporting lithium-sulfur battery anode material comprises graphene/sulfur sponge having rich pore structure comprising graphene and sulfur particles coated with graphene sponges.
  • 专利号:   CN108091860-A
  • 发明人:   WANG H, WEI X, LI X, YIN K, ZHAO C, LI N, LI Y, YANG X, SU B
  • 专利权人:   UNIV WUHAN TECHNOLOGY
  • 国际专利分类:   H01M010/052, H01M004/36, H01M004/38, H01M004/62
  • 专利详细信息:   CN108091860-A 29 May 2018 H01M-004/36 201838 Pages: 7 Chinese
  • 申请详细信息:   CN108091860-A CN11337669 14 Dec 2017
  • 优先权号:   CN11337669

▎ 摘  要

NOVELTY - Self-supporting lithium-sulfur battery anode material comprises graphene/sulfur sponge having rich pore structure. The graphene/sulfur sponge comprises graphene and sulfur particles coated with graphene sponges. USE - Used as self-supporting lithium-sulfur battery anode material. ADVANTAGE - The material: has strong chemical adsorption effect on polysulfide; inhibits loss of polysulfide; and improves cycle performance and capacity of battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the anode material comprising, (i) adding sodium thiosulfate to dispersion of graphene oxide water, and ultrasonically dispersing to obtain a mixture A, (ii) adding diluted hydrochloric acid into the mixture A until the pH value is less than or equal to 7 to obtain mixture B, (iii) adding reducing agent into the mixture B to obtain mixture C, (iv) low-temperature hydrothermal reacting the mixture C to obtain a graphene/sulfur hydrogel, and (v) freezing and drying the graphene/sulfur hydrogel; and (2) use of the graphene/sulfur sponge comprising, cutting graphene/sulfur sponge into needed standard thickness, pressing and directly using as lithium sulfur battery anode material.