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학술지 Dimension-controlled Solid Oxide Electrolytes for All-solid-state Electrodes: Percolation Pathways, Specific Contact Area, and Effective Ionic Conductivity
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저자
박주남, 김주영, 신동옥, 오지민, 김주미, 이명주, 이영기, 유명현, 이용민
발행일
202007
출처
Chemical Engineering Journal, v.391, pp.1-9
ISSN
1385-8947
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.cej.2019.123528
협약과제
19JB1600, 나노입자의 차원 제어를 통한 흑연/고체전해질 복합체 기반의 3차원 구조 음극 설계 및 조성 최적화, 이영기
초록
All-solid-state lithium secondary batteries have never shown both higher energy and power density than them of conventional lithium-ion batteries. Herein, on the basic of well-established percolation theory, we expected what includes a dimension-controlled solid electrolyte in an electrode can improve the electrochemical properties, such as ionic conduction and capacity retention. The behavior of electrodes is systematically demonstrated via computational simulations of virtual electrodes with various dimension-controlled solid electrolytes. In particular, the effective ionic conductivity and the specific contact area are investigated as key parameters that determine cell performance. We confirmed that the dimension-controlled solid electrolyte can improve the electrochemical performance of all-solid-state batteries by enhancing the effective ionic conductivity, which is facilely realized via percolation of the solid electrolyte with an increased dimensional geometry. This simulation prediction suggests a clue to be able to overcome poor performance of present all-solid-state batteries.
KSP 제안 키워드
All-solid-state electrodes, All-solid-state lithium secondary batteries, Contact area, Electrochemical performance, Ion batteries, Ionic conduction, Key parameters, Percolation Theory, Simulation prediction, Solid electrolyte, Solid oxide electrolytes