{"id":11911,"date":"2018-09-27T23:21:57","date_gmt":"2018-09-28T06:21:57","guid":{"rendered":"http:\/\/cafe.foundation\/blog\/?p=11911"},"modified":"2018-09-27T23:21:57","modified_gmt":"2018-09-28T06:21:57","slug":"lithium-oxygen-battery-breakthrough","status":"publish","type":"post","link":"http:\/\/cafe.foundation\/blog\/lithium-oxygen-battery-breakthrough\/","title":{"rendered":"Lithium-Oxygen Battery Breakthrough"},"content":{"rendered":"<p><a href=\"https:\/\/uwaterloo.ca\/news\/news\/chemists-make-breakthrough-road-creating-rechargeable\">The University of Waterloo (Ontario, Canada \u2013 not far from Niagara Falls) News, reported<\/a>, \u201cChemists make breakthrough on the road to creating a rechargeable lithium-oxygen battery.\u201d\u00a0 Dr. Linda Nazar, Canada Research Chair in Solid State Energy Materials, led a team that \u201cResolved two of the most challenging issues surrounding lithium-oxygen batteries, and in the process created a working battery with near 100 per cent coulombic efficiency.\u201d<\/p>\n<p>The new work, which appears this week in the journal <a href=\"http:\/\/science.sciencemag.org\/content\/361\/6404\/777\"><em>Science<\/em><\/a>, Proves that four-electron conversion for lithium-oxygen electrochemistry is highly reversible.\u201d\u00a0 Waterloo is the first to achieve this, doubling electron storage in lithium-oxygen (Li-O<sub>2 <\/sub>\u2013 also known as lithium-air) batteries.\u00a0 The video below touches on this and a great many other chemistries.<\/p>\n<p><iframe loading=\"lazy\" title=\"WISE Energy Day 2018 Afternoon Keynote: Linda Nazar\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/GgD7ZCPGXXE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>Dr. Nazar explains, \u201cThere are limitations based on thermodynamics. \u00a0Nevertheless, our work has addressed fundamental issues that people have been trying to resolve for a long time.\u201d\u00a0 As noted in the abstract for the <em>Science<\/em> paper, when Dr. Nazar and her colleagues changed from using an organic electrolyte to an inorganic molten salt, and replaced a porous carbon cathode to \u201ca bifunctional metal oxide catalyst,\u201d they reduced cell degradation and electrolyte consumption.\u00a0 This extended cycle life and produced near 100-percent Coulombic efficiency (almost every electron that goes into the battery is stored and available for output when called upon).<\/p>\n<p>They achieve the near-theoretical energy density of Li-O<sub>2 <\/sub>cells while giving a \u201chighly-reversible\u201d charge\/discharge characteristic and long life.<\/p>\n<p>The lead author on the study is Chun Xia, a postdoctoral fellow, and co-author is Chun Yuen Kwok, a PhD student, both in Nazar\u2019s lab.<\/p>\n<p>The Natural Sciences and Engineering Research Council of Canada in part funded the project through their Discovery Grants and Canada Research Chair programs, along with the U.S. Department of Energy\u2019s Joint Center for Energy Storage Research.<\/p>\n<p>The abstract for the Science article, \u201cA high-energy-density lithium-oxygen battery based on a reversible four-electron conversion to lithium oxide,\u201d includes reasons lithium-oxygen cells have not been successful up to now.<\/p>\n<p>Batteries based on lithium metal and oxygen could offer energy densities an order of magnitude larger than that of lithium ion cells. But, under normal operation conditions, the lithium oxidizes to form peroxide or superoxide. Xia <em>et al.<\/em> show that, at increased temperatures, the formation of lithium oxide is favored, through a process in which four electrons are transferred for each oxygen molecule (see the Perspective by Feng <em>et al.<\/em>). Reversible cycling is achieved through the use of a thermally stable inorganic electrolyte and a bi-functional catalyst for both oxygen reduction and evolution reactions.\u201d<\/p>\n<p><a href=\"http:\/\/www.sciencemag.org\/news\/2018\/08\/powerful-new-battery-could-help-usher-green-power-grid\">Another report in <em>Science<\/em><\/a> magazine adds to the potential for Dr. Nazar and her team\u2019s findings.<\/p>\n<p>Since lithium-oxygen batteries could store up to 10 times more power than their \u201cconventional\u201d lithium cousins, rail-car-sized batteries could act as backups for a green energy grid. \u201cStoring excess wind and solar power and delivering it on demand.\u201d<\/p>\n<p>So far, the Nazar team\u2019s batteries have no degradation out to 150 cycles.\u00a0 As they demonstrate further charge\/discharge cycles, they will eventually show their ability to take on the big jobs of the future.\u00a0 Although today\u2019s lithium-oxygen batteries require further development, the idea of a 10 times improvement in energy density and long cycle life would certainly find a place in the green flight realm.<\/p>\n<div id=\"facebook_like\"><iframe src=\"http:\/\/www.facebook.com\/plugins\/like.php?href=http%3A%2F%2Fcafe.foundation%2Fblog%2Flithium-oxygen-battery-breakthrough%2F&amp;layout=standard&amp;show_faces=true&amp;width=500&amp;action=like&amp;font=segoe+ui&amp;colorscheme=light&amp;height=80\" scrolling=\"no\" frameborder=\"0\" style=\"border:none; overflow:hidden; width:500px; height:80px;\" allowTransparency=\"true\"><\/iframe><\/div>","protected":false},"excerpt":{"rendered":"<p>The University of Waterloo (Ontario, Canada \u2013 not far from Niagara Falls) News, reported, \u201cChemists make breakthrough on the road to creating a rechargeable lithium-oxygen battery.\u201d\u00a0 Dr. Linda Nazar, Canada Research Chair in Solid State Energy Materials, led a team that \u201cResolved two of the most challenging issues surrounding lithium-oxygen batteries, and in the process [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[6862,6834,14],"tags":[8873,8874,8875,5498,3580,8876],"class_list":["post-11911","post","type-post","status-publish","format-standard","category-batteries","category-solar-power","category-sustainable_ga","tag-chun-xia","tag-chun-yuen-kwok","tag-dr-linda-nazar","tag-lithium-oxygen-battery","tag-science-journal","tag-university-of-waterloo"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - 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