• 专利标题:   Drying method for preparing aqueous sodium-ion batteries comprises pre-mixing active material and conductive agent, adding polytetrafluoroethylene binder, shearing, rolling semi-finished dry-process electrode film and bonding to current collector and bonding to tabs and heat sealing.
  • 专利号:   CN115579530-A
  • 发明人:   CHENG Q, ZHANG Z
  • 专利权人:   SHANGHAI HUAQI RUIZHI NEW ENERGY TECHNOL
  • 国际专利分类:   D01F001/10, D01F006/48, H01M010/38, H01M004/04
  • 专利详细信息:   CN115579530-A 06 Jan 2023 H01M-010/38 202315 Chinese
  • 申请详细信息:   CN115579530-A CN11125058 15 Sep 2022
  • 优先权号:   CN11125058

▎ 摘  要

NOVELTY - Drying method for preparing aqueous sodium-ion batteries comprises (a) pre-mixing the active material and the conductive agent through the mixing equipment to obtain mixed powder, where the active material is water-based sodium ion battery anode material or cathode material, (b) adding the uniformly mixed powder and polytetrafluoroethylene (PTFE) binder into the fiberization equipment, shearing and stirring to obtain a highly fibrous electrode material, (c) transferring the highly fibrous powder to continuous rolling equipment for pre-forming treatment to obtain a self-supporting semifinished dry electrode film, (d) carrying out rolling treatment on the semifinished dry-process electrode film, bonding the finished dry electrode film to the current collector to form a finished dry electrode and bonding to tabs and spot-welding to form a finished dry-process electrode pole piece, and heat sealing. USE - Method for preparing aqueous sodium ion battery is used in electric automobile, transport vehicle, aerospace, energy storage device, power storage system and industrial automation system. ADVANTAGE - The method enables to prepare aqueous sodium ion pouch cell that has improved volume density and load amount of the electrode sheet, compared with the traditional wet electrode, multiplying power performance and cycle stability, and displaying wide application prospect in the energy storage field.