콘텐츠 본문
논문 국내 국내전문학술지(KCI급) Improvement of Electrochemical Performance of Lithium-ion Secondary Batteries using Double-Layered Thick Cathode Electrodes
- 학술지 구분 국내전문학술지(KCI급)
- 게재년월 2022-02
- 저자명 Isheunesu Phiri, Jeong-Tae Kim, Ssendagire Kennedy, Muchakayala Ravi, Yong Min Lee, Myung-Hyun Ryou
- 학술지명 한국전기화학회지
- 발행처명 한국전기화학회지
- 발행국가 국내
- 논문언어 외국어
- 전체저자수 6
- 논문 다운로드 링크(외부) https://www.koreascience.or.kr/article/JAKO202209537199836.page
- 연구분야 자연과학 > 화학
논문 초록 (Abstract)
Various steps in the electrode production process, such as slurry mixing, slurry coating, drying, and calendaring, directly affect the quality and, consequently, mechanical properties and electrochemical performance of electrodes. Herein, a new method of slurry coating is developed: Double-coated electrode. Contrary to single-coated electrode, the cathode is prepared by double coating, wherein each coat is of half the total loading mass of the single-coated electrode. Each coat is dried and calendared. It is found that the double-coated electrode possesses more uniform pore distribution and higher electrode density and allows lesser extent of particle segregation than the singlecoated electrode. Consequently, the double-coated electrode exhibits higher adhesion strength (74.7 N m−1) than the single-coated electrode (57.8 N m−1). Moreover, the double-coated electrode exhibits lower electric resistance (0.152 Ω cm−2) than the single-coated electrode (0.177 Ω cm−2). Compared to the single-coated electrode, the double-coated electrode displays higher electrochemical performance by exhibiting better rate capability, especially at higher C rates, and higher long-term cycling performance. Despite its simplicity, the proposed method allows effective electrode preparation by facilitating high electrochemical performance and is applicable for the large-scale production of high-energy-density electrodes.
