S Korean researchers develop new solid-state electrolyte for high-performance Li-ion batteries stable at high temperatures
05 July 2015
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 cucurbit[6]uril (CB[6])-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[6] for fuel cell electrolytes. It is possible for this lithium ion conduction following porous CB[6] to be safer than existing solid lithium electrolyte-based organic-molecular porous-materials utilizing the simple soaking method.
—Dr. Kimoon Kim, corresponding author
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| Simple incorporation of various lithium precursors to porous CB[6] exhibits high lithium ion conductivities, mobility and safer dried solid lithium electrolytes. Park et al. Click to enlarge. |
Resources
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
A little more here:
http://www.ibs.re.kr/cop/bbs/BBSMSTR_000000000611/selectBoardArticle.do?nttId=11723&kind=&mno=sitemap_02&pageIndex=1&searchCnd=&searchWrd=
Lets hope that this one pans out.
Posted by: Davemart | 05 July 2015 at 05:21 AM
Have they managed to do what Toyota, EU, China and USA have been trying to do for the last 10 years or so.
Can it be mass produced at an affordable price by 2020 or so?
Posted by: HarveyD | 05 July 2015 at 09:14 AM