S Korean researchers develop new solid-state electrolyte for high-performance Li-ion batteries stable at high temperatures
South Korean researchers at the Center for Self-assembly and Complexity, Institute for Basic Science (IBS), Department of Chemistry and Division of Advanced Materials Science at Pohang University, have developed a new solid-state electrolyte based on an organic molecular porous solid which greatly improves the performance of Li-ion batteries performance as well as reducing the risks due to overheating. A paper on their work is published in the RSC journal Chemical Communications.
The team prepared the solid lithium-ion conducting electrolyte by incorporating Li+ ions into a cucurbituril (CB)-based organic molecular porous solid. The resulting material shows high Li+ ion conductivity (~10−4 S cm−1) and mobility (transference numbers, tLi+ = 0.7–0.8). In addition, the solid electrolytes show excellent, thermally stable performance even after several temperature cycles.
We have already investigated high and highly anisotropic [directionally dependent] proton conducting behaviors in porous CB for fuel cell electrolytes. It is possible for this lithium ion conduction following porous CB to be safer than existing solid lithium electrolyte-based organic-molecular porous-materials utilizing the simple soaking method.—Dr. Kimoon Kim, corresponding author
|Simple incorporation of various lithium precursors to porous CB exhibits high lithium ion conductivities, mobility and safer dried solid lithium electrolytes. Park et al. Click to enlarge.|
Jun Heuk Park, Kyungwon Suh, Md. Rumum Rohman, Wooseup Hwang, Minyoung Yoon and Kimoon Kim, (2015), “Solid lithium electrolytes based on an organic molecular porous solid”, Chem Comm doi: 10.1039/c5cc02581h