{"id":12133,"date":"2019-05-23T11:23:40","date_gmt":"2019-05-23T18:23:40","guid":{"rendered":"http:\/\/cafe.foundation\/blog\/?p=12133"},"modified":"2019-05-24T18:02:49","modified_gmt":"2019-05-25T01:02:49","slug":"phosphorene-nanoribbons-may-enhance-batteries-solar-cells","status":"publish","type":"post","link":"http:\/\/cafe.foundation\/blog\/phosphorene-nanoribbons-may-enhance-batteries-solar-cells\/","title":{"rendered":"Phosphorene Nanoribbons may Enhance Batteries, Solar Cells"},"content":{"rendered":"

A great deal is made of how many great scientific discoveries are made by accident<\/a> for everything from penicillin to Post-its\u00ae<\/sup>.\u00a0 \u00a0With no fewer than ten authors for the Nature <\/em>letter<\/a> \u201cProduction of phosphorene nanoribbons,\u201d their discovery hardly seems \u201caccidental.\u201d\u00a0 The letter, authored by Mitchell C. Watts<\/a>,\u00a0Loren Picco<\/a>,\u00a0Freddie S. Russell-Pavier<\/a>,\u00a0Patrick L. Cullen<\/a>,\u00a0Thomas S. Miller<\/a>,\u00a0Szymon P. Bartu\u015b<\/a>,\u00a0Oliver D. Payton<\/a>,\u00a0Neal T. Skipper<\/a>,\u00a0Vasiliki Tileli<\/a>\u00a0and Christopher A. Howard<\/a>, explains their happy \u201caccident.\u201d<\/p>\n

A Happy Accident<\/h4>\n

\u201cNanoribbons, meanwhile, combine the flexibility and unidirectional properties of one-dimensional nanomaterials, the high surface area of 2D nanomaterials and the electron-confinement and edge effects of both. The structures of nanoribbons can thus lead to exceptional control over electronic band structure, the emergence of novel phenomena and unique architectures for applications.”<\/p>\n

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Layered phosphorene ribbens, when split, can be twisted to exploit different properties<\/p><\/div>\n

The discoverers of phosphorene nanoribbons were trying to separate layers of phosphorus crystals into two-dimensional sheets, but they ended up with \u201ctiny, tagliatelle<\/em>-like ribbons one single atom thick and only 100 atoms of so across<\/a>, but up to 100,000 atoms long.\u201d\u00a0 This, according to the researchers, is the width-to-length ratio of the ribbons similar to that of the cables on the Golden Gate Bridge.\u00a0 Their width is \u201cincredibly uniform but manipulable\u201d which allows their properties to be fined tuned.\u00a0 Most interestingly, they can follow contours perfectly, and even be twisted<\/em>.<\/p>\n

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Tagliatelle-like phosphorene ribbons could be a delicious answer to several energy needs<\/p><\/div>\n

The international team, with members from University College London, University of Bristol, Virginia Commonwealth University and Ecole Polytechnique Federale de Lausanne used advanced imaging methods to characterize the ribbons as extremely flat, crystalline and unusually flexible.<\/p>\n

Corrugated Battery Material<\/strong><\/h4>\n
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Combining phosphorene nanoribbons ends up with corrugations that enlarge surface area – a happy circumstance for battery developers<\/p><\/div>\n

Although one probably shouldn\u2019t pour Bolognese sauce over these noodle-like ribbons, they do have an amazing array of transformative possibilities.\u00a0 The discoverers think the corrugated structure of phosphorene nanoribbons could move the charged ions that power batteries up to 1,000 times faster than currently possible with existing materials.\u00a0 This would decrease charging times and provide much greater energy energy storage capacity than conventional batteries.<\/p>\n

As reported in Advanced Energy Materials<\/em><\/a>, the combined properties of phosphorus and sodium could add up to a much more powerful battery than current lithium ion cells.\u00a0 \u201cGreat research efforts have been devoted to developing alternative anode materials with superior electrochemical properties since the anode materials used are closely related to the capacity and safety characteristics of the batteries. With the theoretical capacity of 2596 mA h \u00a0g\u22121 (10 times the capacity of lithium ion cells now used), phosphorus is considered to be the highest capacity anode material for sodium\u2010ion batteries and one of the most attractive anode materials for lithium\u2010ion batteries.\u201d<\/p>\n

Easily Obtained<\/h4>\n

Sodium is much easier to obtain than lithium.\u00a0 Bolivia has tons of lithium salts on its vast desert plains, for instance, but the country is not on good terms with us and has no developed infrastructure to make access to the lithium readily available.\u00a0 Meanwhile, the oceans and shores of the world are ready sources for sodium.<\/p>\n

Researchers think this breakthrough material could be used to extract energy from waste heat, produce high-performance solar cells and provide photocatalysis that would enable efficient, low-cost hydrogen extraction from water.\u00a0 There is much to be explored, and phosphorene might be the next wonder material.<\/p>\n