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자기장을 이용한 LiFePO₄ 결정방향 제어 및 이를 통한 전기화학적 성능 향상

Title
자기장을 이용한 LiFePO₄ 결정방향 제어 및 이를 통한 전기화학적 성능 향상
Alternative Title
Crystal Alignment of LiFePO₄ using a Magnetic Field for Enhanced Electrochemical Performance
Author(s)
김참
Issued Date
2023-01
Citation
한국전지학회, v.2, no.2, pp.205 - 211
Type
Article
Author Keywords
리튬이차전지LiFePO4자기특성자기장결정배향Lithium ion batteryMagnetic propertyMagnetic fieldCrystal alignment
ISSN
1976-7285
Abstract
본 연구에서는 LiFePO₄의 자기특성을 고려, 외부자기장을 이용한 결정방향 제어를 시도하여 LiFePO₄ 결정 내 많은 비율의 b-axis가 전극집전체 표면에 수직으로 정렬된 LiFePO₄ 결정배향체를 확보하였다. 해당 결정배향체는 리튬이차전지의 충방전 과정 중 빠른 리튬이온 전달에 기여함으로써 낮은 전극 분극 현상을 나타내었으며, pristine LiFePO₄ 대비 높은 용량을 기록하였다. 전극활물질 로딩량이 많은 조건일수록 LiFePO₄ 결정배향체는 리튬이온전도성 증가 및 리튬이차전지 성능 향상에 더 크게 기여할 것으로 기대된다.

We attempted to control the crystal orientation of LiFePO4 by adjusting an external magnetic field inconsideration of its magnetic properties; thus, we obtained the crystal-aligned LiFePO4, in which the b-axis washighly oriented perpendicular to the surface of a current collector. The crystal-aligned LiFePO4 potentially con-tributes to favorable conduction of lithium ions during the charge/discharge process in lithium ion batteries, andthus the aligned LiFePO4 should afford lower electrode polarization than the pristine LiFePO4, resulting in thegreater capacity. The aligned LiFePO4 is anticipated to greatly contribute to enhancing lithium ion conductionin high loading electrode condition, resulting in the high electrochemical performance in lithium ion batteries.
URI
http://hdl.handle.net/20.500.11750/46494
DOI
10.53619/kobs.2022.12.2.2.205
Publisher
Korean Battery Society
Related Researcher
  • 김참 Kim, Cham 나노융합연구부
  • Research Interests
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Division of Nanotechnology 1. Journal Articles

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