| 학회 |
한국재료학회 |
| 학술대회 |
2021년 가을 (11/24 ~ 11/26, 경주 라한호텔) |
| 권호 |
27권 2호 |
| 발표분야 |
C. 에너지 재료 분과 |
| 제목 |
Development of Thermal Cross-Linking Binder for Nickel-rich Layered Oxide Materials in High energy density Li-Ion Batteries |
| 초록 |
To improve the energy storage performance of Li-ion batteries, Nickel-rich layered oxides such as LiNi0.8Co0.1Mn0.1O2 (NCM811) are considered. However, NCM811 electrodes has metal dissolution and swelling problem, and conventional binders such as polyvinylidene fluoride (PVDF) do not solve these problems. Because the wet strength of PVDF is too weak to passivate the active materials when in contact with the electrolyte. Herein, this study reports the development of thermal cross-linking binder (S-Binder) which has high ionic conductivity and mitigates the cathode swelling problems through cross-link ability to passivate the NCM811 particles. The rheological properties of S-Binder slurry have more shear thinning behavior and solid-like properties than PVDF. These things can improve the coating quality. The electrochemical performance of S-binder was evaluated by cathode which contain 97.7 wt% active material (mass loading ＞ 10mg/cm2). The uniform passivation of active material with S-binder has multiple advantages. S-binder exhibited a coulombic efficiency of 81.9% after 200 cycles, which is significantly higher than that of PVDF (58.8%). And it has a lower interface resistance. Therefore, S-binders is expected to improve the performance of energy-storage devices and long-driving electric vehicles. |
| 저자 |
유병일1, 유정근2
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| 소속 |
1Carbon Composites Department, 2Composites Research Division |
| 키워드 |
<P>Lithium-ion battery; Binder; electrode</P>
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| E-Mail |
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