{"id":6905,"date":"2019-11-13T11:36:41","date_gmt":"2019-11-13T03:36:41","guid":{"rendered":"https:\/\/battery9999.com\/%e7%be%8e%e5%9c%8b%e7%a0%94%e7%a9%b6%e7%99%bc%e7%8f%be%e5%8f%aa%e8%a6%81%e7%94%a8%e5%85%89%e7%85%a7%e4%b8%80%e7%85%a7%e9%9b%bb%e6%a5%b5%ef%bc%8c%e5%b0%b1%e8%83%bd%e5%8a%a0%e5%bf%ab%e9%8b%b0%e9%9b%bb\/"},"modified":"2019-11-13T14:13:22","modified_gmt":"2019-11-13T06:13:22","slug":"%e7%be%8e%e5%9c%8b%e7%a0%94%e7%a9%b6%e7%99%bc%e7%8f%be%e5%8f%aa%e8%a6%81%e7%94%a8%e5%85%89%e7%85%a7%e4%b8%80%e7%85%a7%e9%9b%bb%e6%a5%b5%ef%bc%8c%e5%b0%b1%e8%83%bd%e5%8a%a0%e5%bf%ab%e9%8b%b0%e9%9b%bb","status":"publish","type":"post","link":"https:\/\/battery9999.com\/en\/%e7%be%8e%e5%9c%8b%e7%a0%94%e7%a9%b6%e7%99%bc%e7%8f%be%e5%8f%aa%e8%a6%81%e7%94%a8%e5%85%89%e7%85%a7%e4%b8%80%e7%85%a7%e9%9b%bb%e6%a5%b5%ef%bc%8c%e5%b0%b1%e8%83%bd%e5%8a%a0%e5%bf%ab%e9%8b%b0%e9%9b%bb\/","title":{"rendered":"Shedding new light on the charging of lithium-ion batteries"},"content":{"rendered":"

By <\/span>Joseph E. Harmon

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Researchers at the U.S. Department of Energy\u2019s (DOE<\/span>) Argonne National Laboratory have reported a new mechanism to speed up the charging of lithium-ion batteries for electric vehicles. Simply exposing the cathode to a beam of concentrated light \u2014 for example, the white light from a xenon lamp \u2014 lowers the battery charging time by a remarkable factor of two or more. If commercialized, such technology could be a game changer for electric vehicles.<\/p>\n

Owners of electric vehicles are well aware of \u200b\u201c<\/span>range anxiety\u201d as the charge level runs low or the location of the closest charging station seems too distant. Fast charging remains a critical challenge if such vehicles are ever to capture a large segment of the transportation market. Charging for an electric car on empty typically takes about eight hours.<\/p>\n

\u201c<\/span>We wanted to greatly shorten this charge reaction without damaging the electrodes from the resulting higher current flow.\u201d \u2014 Christopher Johnson, Argonne Distinguished Fellow<\/p><\/blockquote>\n

Special supercharging stations now exist that achieve ultrafast charging of electric vehicles by delivering a much higher current to the battery. Passing too much current over too short a time, however, degrades battery performance.<\/p>\n

Typically, lithium-ion batteries for vehicles are slowly charged to obtain a complete electrochemical reaction. This reaction involves removing lithium from the oxide cathode and inserting it into the graphite anode.<\/p>\n

\u201c<\/span>We wanted to greatly shorten this charge reaction without damaging the electrodes from the resulting higher current flow,\u201d said Christopher Johnson, Argonne Distinguished Fellow and group leader in the Chemical Sciences and Engineering division.<\/p>\n

Today\u2019s lithium-ion batteries work in a dark state, with the electrodes housed in a case. Argonne\u2019s photo-assisted technology would use a transparent container that allows concentrated light to illuminate the battery electrodes during charging.<\/p>\n

To probe the charge process, the research team crafted small lithium-ion cells (\u201ccoin cells\u201d) with transparent quartz windows. They then tested these cells with and without white light shining through the window onto the cathode.<\/p>\n

\u200b\u201c<\/span>We hypothesized that, during charging, white light would interact favorably with the typical cathode material, and that proved to be the case in our cell tests,\u201d Johnson said. That cathode material is a lithium manganese oxide, abbreviated as LiMn2<\/span><\/sub>O4<\/span><\/sub> (LMO<\/span>).<\/p>\n

The key ingredient in this favorable reaction is the interplay of light with LMO<\/span>, a semiconducting material known to interact with light. While absorbing the photons in the light during charging, the element manganese in the LMO<\/span> changes its charge state from trivalent to tetravalent (Mn3<\/span>+<\/sup> to Mn4<\/span>+<\/sup>). In response, lithium ions eject faster from the cathode than would occur without the photon-excitation process.<\/p>\n

This condition drives the battery reaction faster. The team found that the faster reaction resulted in faster charging without degrading battery performance or cycle life. \u200b\u201c<\/span>Our cell tests showed a factor of two decrease in charging time with the light turned on,\u201d Johnson said.<\/p>\n

The research team performed this work as part of the Center for Electrochemical Energy Science (CEES<\/span>), a DOE<\/span> Energy Frontier Research Center (EFRC<\/span>) led by Argonne.<\/p>\n

\u201c<\/span>This research is a great example of how CEES<\/span>\u2019s goal of understanding the electrode processes in lithium-ion batteries is enabling pivotal advances that are influencing technology,\u201d said Paul Fenter, CEES<\/span> Director and senior physicist in the Chemical Sciences and Engineering division. \u200b\u201c<\/span>This is emblematic of the transformational impacts that the EFRC<\/span> program can achieve.\u201d<\/p>\n

Johnson added that, \u200b\u201c<\/span>This finding is the first of its kind whereby light and battery technologies are merged, and this intersection bodes well for the future of innovative charging concepts for batteries.\u201d<\/p>\n

The Vehicle Technologies Office of the DOE<\/span> Office of Energy Efficiency and Renewable Energy has identified fast charge as a critical challenge in ensuring mass adoption of electric vehicles with a goal of 15<\/span>-min. recharge time, and this research could be a key to making this possible.<\/p>\n

This research appeared in Nature Communications<\/a>, <\/em>titled \u200b\u201c<\/span>Photo-accelerated fast charging of lithium-ion batteries.\u201d In addition to Johnson, other Argonne contributors are Anna Lee, M\u00e1rton V\u00f6r\u00f6s, Wesley M. Dose, Jens Niklas, Oleg Poluektov, Richard D. Schaller, Hakim Iddir, Victor A. Maroni, Eungje Lee, Brian Ingram, and Larry A. Curtiss.<\/p>\n

This research was funded by the DOE<\/span> Office of Basic Energy Sciences and performed, in part, at the Center for Nanoscale Materials, a U.S. Department of Energy Office of Science User Facility.<\/p>\n

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About Argonne\u2019s Center for Nanoscale Materials<\/strong>
\nThe Center for Nanoscale Materials is one of the five DOE<\/span> Nanoscale Science Research Centers, premier national user facilities for interdisciplinary research at the nanoscale supported by the DOE<\/span> Office of Science. Together the NSRCs comprise a suite of complementary facilities that provide researchers with state-of-the-art capabilities to fabricate, process, characterize and model nanoscale materials, and constitute the largest infrastructure investment of the National Nanotechnology Initiative. The NSRCs are located at DOE<\/span>\u2019s Argonne, Brookhaven, Lawrence Berkeley, Oak Ridge, Sandia and Los Alamos National Laboratories. For more information about the DOE<\/span> NSRCs, please visit https:\/\/\u200bsci\u200bence\u200b.osti\u200b.gov\/\u200bU\u200bs\u200be\u200br\u200b-\u200bF\u200ba\u200bc\u200bi\u200bl\u200bi\u200bt\u200bi\u200be\u200bs\u200b\/\u200bU\u200bs\u200be\u200br\u200b-\u200bF\u200ba\u200bc\u200bi\u200bl\u200bi\u200bt\u200bi\u200be\u200bs\u200b-\u200ba\u200bt\u200b-\u200ba\u200b-\u200bG\u200blance<\/a>.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Argonne National Laboratory<\/strong> seeks solutions to pressing national problems in science and technology. The nation\u2019s first national laboratory, Argonne conducts leading-edge basic and applied scientific research in virtually every scientific discipline. Argonne researchers work closely with researchers from hundreds of companies, universities, and federal, state and municipal agencies to help them solve their specific problems, advance America\u2019s scientific leadership and prepare the nation for a better future. With employees from more than 60<\/span> nations, Argonne is managed by UChicago Argonne, LLC<\/span><\/a> for the U.S. Department of Energy\u2019s Office of Science<\/a>.<\/p>\n

The U.S. Department of Energy\u2019s Office of Science<\/strong> is the single largest supporter of basic research in the physical sciences in the United States and is working to address some of the most pressing challenges of our time. For more information, visit https:\/\/\u200bener\u200bgy\u200b.gov\/\u200bs\u200bc\u200bience<\/a>.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

Source:Shedding new light on the charging of lithium-ion batteries<\/a><\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

By Joseph E. Harmon October 30, 2019<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[113,91],"tags":[],"class_list":["post-6905","post","type-post","status-publish","format-standard","hentry","category-industrial-news","category-news-center"],"yoast_head":"\nShedding new light on the charging of lithium-ion batteries - \u660c\u8467\u80a1\u4efd\u6709\u9650\u516c\u53f8<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/battery9999.com\/en\/\u7f8e\u570b\u7814\u7a76\u767c\u73fe\u53ea\u8981\u7528\u5149\u7167\u4e00\u7167\u96fb\u6975\uff0c\u5c31\u80fd\u52a0\u5feb\u92f0\u96fb\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Shedding new light on the charging of lithium-ion batteries - \u660c\u8467\u80a1\u4efd\u6709\u9650\u516c\u53f8\" \/>\n<meta property=\"og:description\" content=\"By Joseph E. 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