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| Type |
Poster Presentation |
| Area |
전기화학 |
| Room No. |
포스터발표장 |
| Time |
4월 21일 (금요일) 13:00~14:30 |
| Code |
ELEC.P-523 |
| Subject |
Self-Assembled Rose-Shaped ZnO Microstructures as an Anode Material for Lithium-Ion Batteries |
| Authors |
김한아, 김남영, 김종식*
동아대학교 화학과, Korea
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| Abstract |
Zinc oxide (ZnO) has attracted significant attentions as an alternative anode material for lithium-ion batteries (LIBs) because of its high theoretical capacity (987 mAh g-1), non-toxic, abundant, and environmental friendliness. Especially, its theoretical capacity is about three times higher than that of the commercialized graphite anode (about 372 mAh g-1) through the alloy and conversion reactions of ZnO with lithium ions. However, severe capacity fading and poor reaction kinetics are caused by low electrical conductivity, slow diffusion of lithium-ion, and large volume changes during charge/discharge processes of ZnO. To overcome these drawback, many studies have been reported about utilizing coatings or mixing with conductive materials to enhance the conductivity and promote the electrochemical reactions. In this work, N-doped carbon-coated ZnO microstructures (ZnO/NC) were synthesized through a facile hydrothermal reaction using urea and citric acid as nitrogen and carbon sources, respectively. The ZnO/NC sample has self-assembled rose-shaped microstructures, which are composed of primary nanoparticles. It exhibited a higher discharge capacity of about 1047 mAh g-1 after 100 cycles at a rate of 0.1 C in the voltage range of 0.01-3.0 V, compared to those of bare ZnO and carbon-coated ZnO (ZnO/C) samples (about 42 mAh g-1 after 50 cycles and 341 mAh g-1, respectively). |
| E-mail |
kjkim4968@gmail.com |
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119th General Meeting of the KCS