Hierarchically designed ZIF-8-derived Ni@ZnO/carbon nanofiber freestanding composite for stable Li storage
- Authors
- Joshi, Bhavana; Samuel, Edmund; Kim, Yong Il; Kim, Min-Woo; Jo, Hong Seok; Swihart, Mark T.; Yoon, Woo Young; Yoon, Sam S.
- Issue Date
- 1-11월-2018
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Ni@ZIF-8; MOF; Nanofiber; Lithium ion battery; Anode
- Citation
- CHEMICAL ENGINEERING JOURNAL, v.351, pp.127 - 134
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMICAL ENGINEERING JOURNAL
- Volume
- 351
- Start Page
- 127
- End Page
- 134
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/71907
- DOI
- 10.1016/j.cej.2018.05.098
- ISSN
- 1385-8947
- Abstract
- We present a uniform rhombohedral Ni@ZnO bimetallic oxide host over carbon nanofibers (CNF) as an anode material for Li-ion batteries. Ni@ZnO was produced by annealing a Ni@zeolitic imidazolate framework (ZIF-8) hierarchically decorated over CNFs. The rationally-designed freestanding composite exhibited promising stability in electrochemical performance. A first reversible capacity of 1051 mA.h.g(-1) was measured at a current density of 100 mA.g(-1), and 88% of this capacity was retained after 100 cycles. We attribute this high capacity retention to the hierarchical structure of the Ni@ZnO-enwrapped carbon framework encapsulating the conductive CNFs, as demonstrated by scanning and transmission electron microscopy. The composite electrode also showed a high specific capacity of similar to 497 mA.h.g(-1) in high-rate testing at 1000 mA.g(-1), because the cage-like framework of the material allowed rapid charge transfer and Li-ion diffusion in the anode.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
- College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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