| 학회 |
한국공업화학회 |
| 학술대회 |
2022년 봄 (05/11 ~ 05/13, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 |
26권 1호 |
| 발표분야 |
학생우수논문발표(박사과정) |
| 제목 |
Dynamic Ionic Transport Actuated by Nanospinbar-dispersed Colloidal Electrolytes Toward Dendrite-free Electrodeposition |
| 초록 |
Homogeneous and fast Li+ transport towards the Li surface is required for uniform and dendrite-free deposition. Here, we present a microturbulence-assisted convective Li+ transfer for suppressing dendrite growth using a magnetic nanospinbar (NSB)-dispersed colloidal electrolyte. We synthesized an ultrahigh-aspect-ratio NSB consisting of a paramagnetic Fe3O4 nanoparticle array and silica outer coating. Manipulating the external electromagnetic force can remotely control the rotation of individual NSBs without dispersion failure, thereby generating a microturbulent flow inside the cell. Regardless of the electrolyte composition, rotating the NSB can reduce the Li+ diffusion layer thickness from the bulk and evenly redistribute the Li+ flux over the Li surface, thereby suppressing Li dendrite growth. The NSB-dispersed electrolyte with advanced salt/solvent compositions demonstrated stable cycling of LMBs over 600 cycles with 70% capacity retention, thereby outperforming the NSB-free cell. |
| 저자 |
임민홍, 김수환, 강준식, 진다희, 안형국, 이현태, 박주남, 이호춘, 이용민, 이홍경
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| 소속 |
DGIST |
| 키워드 |
Li metal battery; Li ion transport
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| E-Mail |
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