Poly L-lysine (PLL)-mediated Porous Hematite Clusters as Anode Materials for Improved Li-Ion Batteries
- Authors
- Kim, Kun-Woo; Lee, Sang-Wha
- Issue Date
- Sep-2015
- Publisher
- KOREAN INST METALS MATERIALS
- Keywords
- hematite; Li-ion battery; poly L-lysine; porous
- Citation
- ELECTRONIC MATERIALS LETTERS, v.11, no.5, pp.815 - 821
- Journal Title
- ELECTRONIC MATERIALS LETTERS
- Volume
- 11
- Number
- 5
- Start Page
- 815
- End Page
- 821
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/10212
- DOI
- 10.1007/s13391-015-4504-4
- ISSN
- 1738-8090
- Abstract
- Porous hematite clusters were prepared as anode materials for improved Li-ion batteries. First, poly-L-lysine (PLL)-linked Fe3O4 was facilely prepared via cross-linking between the positive amine groups of PLL and carboxylate-bound Fe3O4. The subsequent calcination transformed the PLL-linked Fe3O4 into porous hematite clusters (Fe2O3@PLL) consisting of spherical alpha-Fe3O4 particles. Compared with standard Fe2O3, Fe3O4@PLL exhibited improved electrochemical performance as anode materials. The discharge capacity of Fe2O3@PLL was retained at 814.7 mAh g(-1) after 30 cycles, which is equivalent to 80.4% of the second discharge capacity, whereas standard Fe2O3 exhibited a retention capacity of 352.3 mAh g(-1). The improved electrochemical performance of Fe2O3@PLL was mainly attributed to the porous hematite clusters with mesoporosity (20 - 40 nm), which was beneficial for facilitating ion transport, suggesting a useful guideline for the design of porous architectures with higher retention capacity.
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Collections - 공과대학 > 화공생명공학과 > 1. Journal Articles
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