| 학회 |
한국고분자학회 |
| 학술대회 |
2022년 봄 (04/06 ~ 04/08, 대전컨벤션센터) |
| 권호 |
47권 1호 |
| 발표분야 |
고분자합성 |
| 제목 |
High Adhesive Polyimide Binder via Water-processable Synthesis for Silicon Anodes in Lithium-ion Batteries |
| 초록 |
Silicon (Si) is promising anode materials for lithium-ion batteries (LIBs) owing to its remarkably high theoretical energy density, low reduction potential, and low cost. However, there is still limited for practical application due to its severe volume changes during charge/discharge process, resulting in capacity fading. Here, water-processable polyimide (W-PI) precursor binder, poly(amic acid) salt (W-PAmA), is synthesized via a simple one-step process for high performance silicon anodes. A W-PAmA is converted to W-PI by thermal curing at low-temperature of 150 ℃ compared to conventional process. In addition to the rigid backbone, this polymer contains 30% of monomer with carboxylic acid (-COOH) groups which effectively accommodate the volume expansion of Si-based electrode by chemical interaction with the surface on silicon nanoparticles. The W-PI-based binder with strong adhesion achieve high capacity (2061 mAh g-1) and excellent cycling stability (1883 mAh g-1 after 200 cycles). |
| 저자 |
소유진1, 김진수1, 정희태2, 원종찬1, 유명현3, 김윤호1
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| 소속 |
1한국화학(연), 2한국과학기술원, 3한밭대 |
| 키워드 |
lithium-ion batteries; silicon anodes; binder; polyimide; water-processable
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| E-Mail |
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