• 专利标题:   Anode film layer additive composition used e.g. for secondary battery, comprises charge stabilizer, adhesive auxiliary agent i.e. amide-containing structure polymer, and polymer super-dispersant i.e. polyether super-dispersant.
  • 专利号:   CN114050260-A, CN114050260-B
  • 发明人:   QIAN C, XING M, XIANG Y, QIN L, ZHOU Z, YUE M
  • 专利权人:   SHENZHEN YANYI NEW MATERIALS CO LTD
  • 国际专利分类:   H01M010/0525, H01M004/62
  • 专利详细信息:   CN114050260-A 15 Feb 2022 H01M-004/62 202232 Chinese
  • 申请详细信息:   CN114050260-A CN11232244 22 Oct 2021
  • 优先权号:   CN11232244

▎ 摘  要

NOVELTY - An anode film layer additive composition comprises adhesive auxiliary agent, charge stabilizer and polymer super-dispersant. The adhesive auxiliary agent is amide-containing structure polymer. The charge stabilizer is amino alcohol compound. The polymer super-dispersant is polyether super-dispersant. USE - The anode film layer additive composition is used for anode film layer additive, positive pole piece and secondary battery (all claimed) ADVANTAGE - The product improves dispersibility of active material and conductive material and flexibility of pole piece, reduces viscosity of slurry, solves problem that thick coating pole piece is cracked when performing thick coating, and greatly improves energy density of battery and cycle performance of capacity conservation rate after cycle of secondary battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a positive film layer additive comprising anode film layer additive composition and solvent A; and (2) a positive pole piece comprising adding anode active material, conductive agent, binder and anode film layer additive to solvent B and uniformly mixing to obtain anode slurry, uniformly coating on positive current collector, forming positive film layer, and drying, rolling and cutting. The solvent A comprises N-methylpyrrolidone. The additive comprises 1-3 pts. wt. adhesive auxiliary agent, 10-50 pts. wt. charge stabilizer, 1-10 pts. wt. polymer super-dispersant and 40-90 pts. wt. solvent A.