Structurally stabilized lithium-metal anode via surface chemistry engineering
- Authors
- Lee, Jaewoo; Choi, Seung Hyun; Qutaish, Hamzeh; Hyeon, Yuhwan; Han, Sang A; Heo, Yoon-Uk; Whang, Dongmok; Lee, Jong-Won; Moon, Janghyuk; Park, Min-Sik; Kim, Jung Ho; Dou, Shi Xue
- Issue Date
- May-2021
- Publisher
- Elsevier B.V.
- Keywords
- Lithiophilicity; Lithium-metal anode; Mesoporous host; Nanoarchitecture
- Citation
- Energy Storage Materials, v.37, pp 315 - 324
- Pages
- 10
- Journal Title
- Energy Storage Materials
- Volume
- 37
- Start Page
- 315
- End Page
- 324
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/48763
- DOI
- 10.1016/j.ensm.2021.02.019
- ISSN
- 2405-8297
2405-8297
- Abstract
- Dendrite-free lithium (Li) has been the primary issue for the practical application of metallic Li anode. Repeated Li plating/stripping is known to inevitably lead to severe volume changes and gradual Li dendrite growth, eventually resulting in irreversible Li (called dead-Li) as an unexpected feature. In order to avoid the dead-Li, a lithiophilic surface is highly desirable and a nanoarchitectured host for metallic Li is also required. Herein, cobalt-embedded, mesoporous, nitrogen-doped graphite (N-doped graphite) is strategically proposed as a new innovative Li-metal storage host. After tuning the surface chemistry, the material shows high Li ion affinity as well as a highly lithiophilic surface, which is attributed to the low formation energy of N-doped graphite, strongly supported by density functional theory calculations. As a result, the desirable anode shows excellent electrochemical performance with high Li-metal reversible capacity and even stable long-term cyclability with no dead-Li formation. Our findings pave the way to optimize the Li-metal host up to the limit of the theoretical capacity. © 2021
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