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Park, Soojin
Nano-Functional Materials Lab
Research Interests
  • Block Copolymers, nanostructured materials for Lithium-Ion batteries, wearable and stretchable energy storage applications

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Revisit of metallothermic reduction for macroporous Si: Compromise between capacity and volume expansion for practical Li-ion battery

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Title
Revisit of metallothermic reduction for macroporous Si: Compromise between capacity and volume expansion for practical Li-ion battery
Author
Choi, SinhoBok, TaesooRyu, JaegeonLee, Jung-InCho, JaephilPark, Soojin
Issue Date
2015-03
Publisher
Elsevier BV
Citation
NANO ENERGY, v.12, pp.161 - 168
Abstract
We revisit the metallothermic reduction process to synthesize shape-preserving macro-/nanoporous Si particles via aluminothermic and subsequent magnesiotheric reaction of porous silica particles. This process enables us to control the specific capacity and volume expansion of shape-preserving porous Si-based anodes. Two step metallothermic reactions have several advantages including a successful synthesis of shape-preserving Si particles, tunable specific capacity of as-synthesized Si anode, accommodation of a large volume change of Si by porous nature and alumina layers, and a scalable synthesis (hundreds of gram per batch). An optimized macroporous Si/Al2O3 composite anode exhibits a reversible capacity of similar to 1500 mAh g(-1) after 100 cycles at C/5 and a volume expansion of 34% even after 100 cycles.
URI
https://scholarworks.unist.ac.kr/handle/201301/10085
URL
http://www.sciencedirect.com/science/article/pii/S2211285514002791
DOI
10.1016/j.nanoen.2014.12.010
ISSN
2211-2855
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