[논문]리튬이온 전지용 분리막의 표면 개질 기술 및 연구 동향

하성민; 김대섭; 곽철환; 이영석

doi:10.14478/ace.2022.1051

리튬이온 전지용 분리막의 표면 개질 기술 및 연구 동향
Surface Modification Technology and Research Trends of Separators for Lithium-Ion Batteries 원문보기

공업화학 = Applied chemistry for engineering, v.33 no.4, 2022년, pp.343 - 351

하성민 (충남대학교 응용화학공학과) , 김대섭 (충남대학교 응용화학공학과) , 곽철환 (충남대학교 탄소융복합기술연구소) , 이영석 (충남대학교 응용화학공학과)

초록
AI-Helper

리튬이온 전지(lithium-ion batteries, LIBs)는 높은 에너지 밀도, 느린 자가방전율, 고율 충전 능력 및 긴 배터리 수명 등의 좋은 성능으로 촉망받는 에너지 저장 장치로 꼽힌다. 그러나 고에너지 밀도의 전기자동차 및 대형 디바이스 산업에서 이러한 LIBs의 적용은 큰 안전 문제를 일으키고 있다. 이러한 문제를 해결하기 위하여 열적 안정성 및 내재적 안전성이 높은 재료를 개발하는 것이 LIBs의 안정성 및 전기화학적 성능을 향상시키는 궁극적인 해결방법이다. 본 총설에서는 상용 분리막의 안정성 문제 극복을 위한 분리막의 표면 개질 기술을 소개하였으며 이를 이용하여 개질된 리튬이온 전지용 분리막을 활용한 연구 동향을 요약, 정리하였다. 또한 이를 기반으로 표면 개질에 따른 분리막에 대한 향후 전망을 논의하였다.

Abstract ▼ AI-Helper

Lithium-ion batteries (LIBs) are considered promising energy storage devices with good performance such as high energy density, slow self-discharge rate, high rate charge capacity, and long battery life. However, the application of these LIBs in the high-energy density electric vehicle and large device industries poses a major safety problem. In order to solve this problem, developing a material having high thermal stability and intrinsic safety is the ultimate solution for improving the stability and electrochemical performance of LIBs. This review introduced a surface modification technology of a separator to overcome the stability problem of a commercial separator, and summarized and summarized the research trends using the modified separator for a lithium-ion battery. Based on this, the future prospects for the separator development by surface modification were discussed.

주제어

표/그림 (9)

그림 Figure 1. A scheme of the charge/discharge reaction of the LIBs.
그림 Figure 2. Schematic diagram of the surface modification mechanism of the surface modification separator through dip coating: (a) PVA/TEOS coating[18], (b) PDA/TEOS coating[19], (c) WCDA/SiO₂ coating[20], (d) PDA/ANFs coating[22].
그림 Figure 3. Schematic diagram of (a) blade coating method[24] and surface modification mechanism of (b) silica aerogel/PVDF[25], PEEK/PVA by blade coating[28].
표 Table 1. Properties of Separators for Commercial Lib by Surface Modification through Dip-Coating Method
표 Table 2. Properties of Separators for Commercial Libs by Surface Modification through Blade Casting Method
그림 Figure 4. Schematic diagram of (a) Equipment of plasma surface treatment[31] and surface modification mechanism: (b, c) surface modification by oxygen plasma treatment[34,37].
그림 Figure 5. Characteristics of capacity retention according to cycle number by surface modification method.
그림 Figure 6. Characteristics of Electrolyte uptake and Thermal shrinkage by surface modification of separator.
표 Table 3. Properties of Separators for Commercial LIBs by Surface Modification Through Plasma Treatment Method

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