Studies of lithium dendrite control and electrode design for lithium metal battery = 리튬 금속 전지의 리튬 수지상 제어 및 전극 설계에 관한 연구

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 20
  • Download : 0
Recently, electric vehicles have been attracting attention due to climate change, and demand for increasing mileage and driving time is increasing. For this purpose, it is necessary to develop materials having a high energy density, and there is an attempt to replace the commercial graphite anode with the lithium metal anode. Lithium metal has lowest redox potential and has a high theoretical capacity of 3860 mAh $g^{-1}$ which can improve energy density of secondary batteries. However, there are problems with the lower reversibility due to electrolyte consumption caused by high reactivity of lithium metal and the growth of dendrite during cell driving, which causes stability problems. Thus, to overcome low reversibility and stability, the design of electrodes that can control the growth of lithium dendrites is essential. In this thesis, two methods were used to improve the performance of lithium metal batteries. First, using an alloy with a small amount of magnesium in lithium metal, a mechanism for suppressing lithium dendrite growth through control of surface energy while maintaining physical/chemical properties of lithium was identified. Secondly, the lithium metal anode surface was protected by using a MXene-graphene oxide-polymer composite film, and the performance was improved by utilizing the strengths of A and B respectively. These studies suggest that various and integrated approaches are needed to solve the problems of battery components.
Advisors
Chung, Sung‐Yoonresearcher정성윤researcher
Description
한국과학기술원 :신소재공학과,
Publisher
한국과학기술원
Issue Date
2020
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 신소재공학과, 2020.2,[vii, 92 p. :]

Keywords

Lithium metal anode▼aDendrite growth▼aCoulombic efficiency▼aLi-Mg alloy▼aMXene-Graphene Oxide film; 리튬 금속 음극▼a수지상 성장▼a쿨롱 효율▼a리튬-마그네슘 합금▼a멕신-그래핀 옥사이드 필름

URI
http://hdl.handle.net/10203/283478
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=901564&flag=dissertation
Appears in Collection
MS-Theses_Ph.D.(박사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0