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- Title
锂离子电池用新型粘接剂的研制.
- Authors
史明慧; 杨纪元; 张群朝; 蒋涛; 旅德安; 尤俊; 郝同辉
- Abstract
A new polymer P(J-BA-VEIS) was prepared by in-situ polymerization with tert-butyl acrylate (i~BA) and ethyl trilactate vinyl silane (VELS) as monomers, whose structure and thermostability were characterized by IR and TGA. The electrochemical performance of the battery with P(J-BA-VELS) and polyvinylidene fluoride (PVDF) as adhesive was studied by battery cycle test and field emission scanning electron microscope. Results showed that the viscosity of P(f-BA-VELS) increased first and then decreased with the increase of azodiisobutyronitrile. When the amount of initiator was 0. 5%, the viscosity of P(f-BA-VELS) reached the highest value of 6. 34 Pa.s. With the increase of the mass ratio of J-BA to VEIS, the viscosity of P(f-BA-VELS) first increased and then decreased. When the mass ratio of jtBA to VELS was 70: 30, the viscosity of the product reached the highest value of 9. 99 Pa.s; the mass loss of P(f-BA-VELS) began to accelerate within 200 *500 X:, which indicated that the polymer began to decompose at 200 T:, with good thermal stability. The specific capacity of the battery bonded with P(f-BA-VELS) was 410 mAh/g, which was higher than that of the battery bonded with PVDF (260 mAh/g). After 100 charge discharge cycles, the discharge capacity of the battery bonded with P(j-BA-VELS) was 50% higher than that with PVDF. The negative electrode plate bonded with PVDF had a large area of powder drop and cracks, while the negative plate bonded with P(/-BA-VELS) had no evident powder drop or crack. In conclusion, P(f-BA-VELS) is a promising adhesive for lithium-ion batteries.
- Publication
Silicone Material, 2020, Issue 5, p25
- ISSN
1009-4369
- Publication type
Article
- DOI
10.11941/j.issn.1009-4369.2020.05.005