• 专利标题:   Preparing tin(IV) sulfide used in composition for anode material and lithium ion electrochemical cell, involves dissolving tin source and sulfur source in solvent, and heating solution.
  • 专利号:   IN202011007366-A
  • 发明人:   BABU P S, THAKUR A K, BALASUBRAMANIAN T S, CHANDRASEKHAR
  • 专利权人:   DEFENCE RES DEV ORG
  • 国际专利分类:   H01M010/0525, H01M004/38, H01M008/1213, C01G049/00, H01M004/36
  • 专利详细信息:   IN202011007366-A 27 Aug 2021 H01M-010/0525 202178 Pages: 45 English
  • 申请详细信息:   IN202011007366-A IN11007366 20 Feb 2020
  • 优先权号:   IN11007366

▎ 摘  要

NOVELTY - Process for preparing tin(IV) sulfide, involves dissolving a tin source and a sulfur source in a stoichiometric molar ratio of 0.5-1.5:1-10.5 m/l in a solvent, and heating the solution at 120-250 degrees C for 8-32 hours. USE - The process is useful for preparing tin(IV) sulfide used in composition for anode material and lithium ion electrochemical cell. ADVANTAGE - The method is simple to obtain tin(IV) sulfide nanomaterials with specific structures, high electrical conductivity, high reversible capacity, prolonged cycle life, high yield and improved electrochemical performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a composition for an anode material, comprising tin(IV) sulfide, at least one polymeric binder comprising polyvinylidene difluoride and natural rubber, and at least one conducting material comprising carbon and graphene, where the weight ratio of tin (IV)sulfide, polymeric binder and conducting material is 80:10:10-90:5:5; (2) a process for preparing a tin(IV) sulfide hexagonal nanosheet anode, involving mixing tin(IV) sulfide, polymeric binder and conducting material in a weight ratio of 80:10:10-90:5:5 to obtain a uniform slurry, uniformly coating the slurry on the copper foil, drying, and rolling the slurry coated copper foil; and (3) a lithium ion electrochemical cell comprising a working electrode comprising tin(IV) sulfide, a counter electrode comprising lithium metal or alloy of lithium, a separator comprising polypropylene carbonate film or glass fiber, and an electrolyte comprising lithium hexafluoroarsenate, lithium hexafluorophosphate, and lithium perchlorate in an organic solvent comprising diethyl carbonate, ethylene carbonate- dimethyl carbonate, ethylene carbonate-propylene carbonate-diethyl carbonate and/or ethylene carbonate-diethyl carbonate-dimethyl carbonate.