DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 김일두 | - |
dc.contributor.author | Song, Hyunsub | - |
dc.contributor.author | 송현섭 | - |
dc.date.accessioned | 2024-08-08T19:31:21Z | - |
dc.date.available | 2024-08-08T19:31:21Z | - |
dc.date.issued | 2024 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=1099303&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/322084 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 신소재공학과, 2024.2,[iii, 75 p. :] | - |
dc.description.abstract | Lithium (Li) metal anode holds promise for high-energy batteries thanks to its high theoretical specific capacity and low redox potential. However, the inherent instability of metallic Li surfaces leads to the formation of brittle and uneven solid-electrolyte interphase (SEI) layers, exacerbating issues such as Li dendrite growth and limiting battery life. In this study, we introduce a 100-nm poly(dimethylaminomethyl styrene) (pDMAMS) nanolayer, deposited via initiated chemical vapor deposition (iCVD), to passivate the Li metal anode. The iCVD pDMAMS layer swells significantly in a carbonate electrolyte, forming an electrolyte-filled soft-scaffold for Li-ion transport. This swollen tertiary amine polymer interacts with the electrolyte to generate robust scaffold, establishing homogeneous Li2O-free and Li2CO3-rich native SEI layers. This approach achieves a record-high Li-ion transference number of 0.95 with high ionic conductivity (6.54 mS cm-1). The cycle life of pDMAMS-Li anode is extended by 550% in symmetrical cells and 600% in LiNi0.6Mn0.2Co0.2O2 (NMC622) based full cells compared to bare Li anode. In another study, a bifunctional polymer scaffold is employed to accommodate and modify Li dendrites and SEI layers. The CMGG-Li@PAM membrane (C-Li@P) with a 3D framework and beneficial SEI components is introduced. The biodegradable membrane enhances Li transportation at the anode/electrolyte interphase and tunes the constitution of SEI with Li3N, LiF, and LixPFy-based components. The C-Li@P membrane facilitates uniform Li deposition, mitigating dendrite formation. This research, which focuses on processes and materials designed to environmentally and effectively stabilize the interface of highly reactive lithium anode, play a pivotal role in the advancement of sustainable and long-term cycle next-generation lithium metal battery systems. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | 리튬 금속 배터리▼a리튬 덴드라이트▼a고체-전해질 간기층▼a개시화학기상증착 공정▼a전기방사 | - |
dc.subject | Lithium metal battery (LMB)▼aLithium dendrite▼aSolid-electrolyte interphase▼aInitiated chemical vapor deposition (iCVD)▼aElectrospinning | - |
dc.title | (A) study of controlling interfacial interactions in polymeric membrane and its application | - |
dc.title.alternative | 고분자막의 계면 현상 제어와 응용에 관한 연구 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :신소재공학과, | - |
dc.contributor.alternativeauthor | Kim, Il-Doo | - |
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