Nano/Microstructured Silicon–Carbon Hybrid Composite Particles Fabricated with Corn Starch Biowaste as Anode Materials for Li-Ion Batteries
- Authors
- Kwon, Hyun Jung; Hwang, Jang-Yeon; Shin, Hyeon-Ji; Jeong, Min-Gi; Chung, Kyung Yoon; Sun, Yang-Kook; Jung, Hun-Gi
- Issue Date
- Jan-2020
- Publisher
- AMER CHEMICAL SOC
- Keywords
- Lithium-ion batteries; silicon anode; high capacity; high energy; biowaste product
- Citation
- NANO LETTERS, v.20, no.1, pp.625 - 635
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANO LETTERS
- Volume
- 20
- Number
- 1
- Start Page
- 625
- End Page
- 635
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/2090
- DOI
- 10.1021/acs.nanolett.9b04395
- ISSN
- 1530-6984
- Abstract
- Silicon has a great potential as an alternative to graphite which is currently used commercially as an anode material in lithium-ion batteries (LIBs) because of its exceptional capacity and reasonable working potential. Herein, a low-cost and scalable approach is proposed for the production of high-performance silicon–carbon (Si–C) hybrid composite anodes for high-energy LIBs. The Si–C composite material is synthesized using a scalable microemulsion method by selecting silicon nanoparticles, using low-cost corn starch as a biomass precursor and finally conducting heat treatment under C3H6 gas. This produces a unique nano/microstructured Si–C hybrid composite comprised of silicon nanoparticles embedded in micron-sized amorphous carbon balls derived from corn starch that is capsuled by thin graphitic carbon layer. Such a dual carbon matrix tightly surrounds the silicon nanoparticles that provides high electronic conductivity and significantly decreases the absolute stress/strain of the material during multiple lithiation-delithiation processes. The Si–C hybrid composite anode demonstrates a high capacity of 1800 mAh g–1, outstanding cycling stability with capacity retention of 80% over 500 cycles, and fast charge–discharge capability of 12 min. Moreover, the Si–C composite anode exhibits good acceptability in practical LIBs assembled with commercial Li[Ni0.6Co0.2Mn0.2]O2 and Li[Ni0.80Co0.15Al0.05]O2 cathodes.
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