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Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .


Highly Densified Fracture-Free Silicon-based Electrode for High Energy Lithium-Ion Batteries

DC Field Value Language Sung, Jaekyung ko Kim, Namhyung ko Kim, Sang-Pil ko Lee, Taeyong ko Yoon, Moonsu ko Cho, Jaephil ko 2023-01-06T02:22:00Z - 2023-01-02 ko 2022-09 ko
dc.identifier.citation BATTERIES & SUPERCAPS, v.5, no.9, pp.e202200136 ko
dc.identifier.issn 2566-6223 ko
dc.identifier.uri -
dc.description.abstract There has recently been an increasing volume of research in silicon-based anodes for high energy density lithium-ion batteries. Micron-sized composites with high tap density and a number of pores accommodating the massive volume expansion of silicon (Si) exhibit considerable electrochemical performance with high volumetric energy density. However, huge pressure on the particle during the calendering process brings about mechanical failure which causes the formation of additional by-products upon lithiation and electrical contact loss. Here, we discover specific particle size distribution based on the constructive simulation including calculation of the packing density depending on the different particle size distribution and stress evolution of each particle at high pressure. A silicon/graphite hybrid anode in which the silicon nanolayer (similar to 15 nm) is coated on the graphite is selected to validate the simulation. This anode sustains its morphological integrity and secures its void space without crack propagation of the silicon nanolayer in the densely packed electrode. As a result, it demonstrates high initial specific capacity (>500 mAh g(-1)), high initial Coulombic efficiency (95.2 %), low electrode swelling ratio (35 % at first cycle), and excellent capacity retention ratio (99.1 % during 50 cycles) for high energy density lithium-ion batteries. ko
dc.language 영어 ko
dc.publisher WILEY-V C H VERLAG GMBH ko
dc.title Highly Densified Fracture-Free Silicon-based Electrode for High Energy Lithium-Ion Batteries ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85131883032 ko
dc.identifier.wosid 000811244500001 ko
dc.type.rims ART ko
dc.identifier.doi 10.1002/batt.202200136 ko
dc.identifier.url ko
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