Multilayer electrolyte cell: A new tool for identifying electrochemical performances of high voltage cathode materials

作者：MahootcheianAsl Nina; Kim Jung Hyun^*; Pieczonka Nicholas P W; Liu Zhongyi; Kim Youngsik

来源：Electrochemistry Communications, 2013, 32: 1-4.

DOI：10.1016/j.elecom.2013.03.031

• Multilayer electrolyte
• High voltage cathodes
• LiNi0.5Mn1.5O4
• Mn dissolution
• Li-ion batteries

Multilayer electrolyte cell (MEC) was designed and developed as a new tool for investigating electrode/electrolyte interfacial reactions in a battery system. The MEC consists of two liquid electrolytes separated by a solid electrolyte which prevents electrolyte crossover while selectively transporting Li+ ions. The MEC successfully reproduced the performance of LiFePO4 comparable with that obtained from coin cells. In addition, the origin of capacity fading in LiNi(0.5)Mn(1.5)O(4)full-cell (with graphite negative electrode) was studied using the MEC. The performance of LiNi0.5Mn1.5O4 MEC full-cell was superior to that of coin full-cell by eliminating the Mn dissolution problem on graphite negative electrode as evidenced by transmission electron microscopyanalysis. The MEC can be a strong tool for identifying the electrochemical performances of future high voltage positive electrode materials and their electrode/electrolyte interfacial reactions.

• 出版日期2013-7