Stabilizing High-Voltage and High-Capacity Cathode-Electrolyte Interface Using Functional Electrolyte Component

Wednesday, 4 October 2017
Prince George's Exhibit Hall D/E (Gaylord National Resort and Convention Center)
H. Y. Lee (Chungnam National University, Republic of Korea), H. Q. Pham (Chungnam National University, Republic of Korea), Y. G. Kwon, E. H. Hwang (Leechem Co., Ltd., Republic of Korea), and S. W. Song (Chungnam National University, Republic of Korea)
Li- and Mn-rich xLi2MnO3(1−x)LiMO2 (M = Mn, Ni, Co) layered oxides cathode materials are known to exhibit high specific capacities ≥ 250 mAhg−1 on the high-voltage operation above 4.6 V vs. Li/Li+,1,2 which are considered as promising cathode materials for achieving advanced high-energy density lithium-ion batteries. The capacity of these cathode materials can increase by increasing the charge cut-off voltage. However, the limited anodic instability of the conventional carbonate-based organic electrolytes above 4.2 V vs. Li/Li+ makes the attainment of high capacity from Li-rich layered oxide cathode material difficult. In order to mitigate the electrolyte issue, we have been developing new functional electrolyte components with high anodic stability above 4.6 V to stabilize high-voltage interface between Li-rich layered oxide cathode and electrolyte.1,2 High-voltage electrochemical and cathode-electrolyte interfacial studies and their correlation to high-voltage cycling performance would be presented in the meeting.


This research was supported by Ministry of Trade, Industry & Energy (R0004645) and Creative Human Resource Development Consortium for Fusion Technology of Functional Chemical/ Bio Materials of BK Plus program by Ministry of Education of Korea.


1. H. Q. Pham, K.-M. Nam, E.-H. Hwang, Y.-G. Kwon, H.-M. Jung, S.-W. Song, J. Electrochem. Soc., 161, A2002 (2014).

2. H. Q. Pham, E.-H. Hwang, Y.-G. Kwon, S.-W. Song, J. Power Sources, 323, 220, (2016).