{"id":112154,"date":"2021-10-12T11:16:14","date_gmt":"2021-10-12T03:16:14","guid":{"rendered":"https:\/\/www.alpapowder.com\/112154\/"},"modified":"2021-10-12T11:16:14","modified_gmt":"2021-10-12T03:16:14","slug":"lityum-pil-anot-malzemesi-kuresel-grafiti-anlayin","status":"publish","type":"post","link":"https:\/\/www.alpapowder.com\/tr\/112154\/","title":{"rendered":"Lityum pil anot malzemesi-k\u00fcresel grafiti anlay\u0131n"},"content":{"rendered":"<p>Grafit (a\u015fa\u011f\u0131da ayn\u0131 olan do\u011fal ta\u015fa at\u0131fta bulunur) metalik olmayan bir mineral kayna\u011f\u0131d\u0131r. Grafit malzemeler, y\u00fcksek s\u0131cakl\u0131k dayan\u0131m\u0131, elektriksel iletkenlik, termal iletkenlik, ya\u011flama, kimyasal kararl\u0131l\u0131k, plastisite ve termal \u015fok direnci gibi \u00e7e\u015fitli \u00f6zel \u00f6zelliklere sahiptir. Bunlar\u0131n aras\u0131nda k\u00fcresel grafit, grafit alan\u0131nda son teknoloji \u00fcr\u00fcn\u00fc bir \u00fcr\u00fcnd\u00fcr ve yeni enerji ara\u00e7lar\u0131, enerji depolama ve \u00e7evre koruma gibi stratejik geli\u015fmekte olan end\u00fcstrilerde kullan\u0131lmaktad\u0131r.<\/p>\n<p>K\u00fcresel grafit, hammadde olarak y\u00fcksek kaliteli y\u00fcksek karbonlu do\u011fal pul grafitten yap\u0131lm\u0131\u015ft\u0131r ve grafit y\u00fczeyi, oval k\u00fcreler gibi farkl\u0131 incelik ve \u015fekle sahip grafit \u00fcr\u00fcnleri \u00fcretmek i\u00e7in ileri i\u015fleme teknolojisi ile modifiye edilmi\u015ftir.<\/p>\n<p><img decoding=\"async\" class=\"wp-image-112131 size-full aligncenter\" src=\"https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/10\/graphite-pic.jpg\" alt=\"\" width=\"1000\" height=\"800\" srcset=\"https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/10\/graphite-pic.jpg 1000w, https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/10\/graphite-pic-300x240.jpg 300w, https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/10\/graphite-pic-768x614.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<h4>K\u00fcresel grafiti \u00f6l\u00e7mek i\u00e7in g\u00f6stergeler<\/h4>\n<ul>\n<li><strong>Fiziksel performans endeksi<\/strong><\/li>\n<\/ul>\n<p>Partik\u00fcl boyutu (D50, \u03bcm), musluk yo\u011funlu\u011fu (g\/cm\u00b3), spesifik y\u00fczey alan\u0131 (\u33a1\/g), nem (%), sabit karbon (%)<\/p>\n<ul>\n<li><strong>Elektrokimyasal performans indeksi<\/strong><\/li>\n<\/ul>\n<p>Coulomb verimlili\u011fi (%), \u015farj kapasitesi (mAh\/g), \u00e7evrim \u00f6mr\u00fc (d\u00f6ng\u00fc)<\/p>\n<h4>Do\u011fal grafitin avantajlar\u0131 ve dezavantajlar\u0131<\/h4>\n<p>Do\u011fal grafit, lityum iyon piller i\u00e7in bir negatif elektrot malzemesi olarak kullan\u0131lma avantajlar\u0131na sahiptir: geni\u015f kaynaklar, d\u00fc\u015f\u00fck fiyat, d\u00fc\u015f\u00fck \u015farj ve de\u015farj voltaj\u0131 platformu ve y\u00fcksek tersinir kapasite (teorik de\u011fer 372mAh\/g).<\/p>\n<p>Ancak, pilin negatif elektrot malzemesi olarak grafitle ilgili bir\u00e7ok sorun vard\u0131r: solventlerle zay\u0131f uyumluluk; y\u00fcksek ak\u0131ml\u0131 \u015farj ve de\u015farjda d\u00fc\u015f\u00fck performans; \u0130lk \u015farj ve de\u015farj s\u0131ras\u0131nda, solvent molek\u00fcllerinin birlikte g\u00f6m\u00fclmesi nedeniyle grafit tabakas\u0131 soyulur ve bu da elektrot \u00f6mr\u00fcnde bir azalmaya yol a\u00e7ar.<\/p>\n<h4>K\u00fcresel grafit olu\u015fumu<\/h4>\n<p>Pul grafitin k\u00fcreselle\u015ftirilmesi yoluyla, negatif elektrot malzemesinin \u00f6zg\u00fcl kapasitesi (\u2265350mAh\/g), ilk d\u00f6ng\u00fc verimlili\u011fi (\u2265%85) ve d\u00f6ng\u00fc performans\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftirilebilir.<\/p>\n<ul>\n<li><strong>tanecik boyutu<\/strong><\/li>\n<\/ul>\n<p>Lityum iyon piller i\u00e7in bir negatif elektrot malzemesi olarak, partik\u00fcl boyutu D50 en uygun olan\u0131d\u0131r 16 ve 18 \u00b5m. Par\u00e7ac\u0131k boyutu \u00e7ok k\u00fc\u00e7\u00fckse, spesifik y\u00fczey alan\u0131 daha b\u00fcy\u00fck olacak ve ilk d\u00f6ng\u00fc s\u0131ras\u0131nda negatif elektrotun b\u00fcy\u00fck miktarda Li<sup>+<\/sup> t\u00fcketmesine neden olacak ve b\u00f6ylece ilk \u015farj ve de\u015farj verimlili\u011fi olan kat\u0131 bir dielektrik aray\u00fczey filmi olu\u015fturacakt\u0131r; S\u0131v\u0131 temas alan\u0131 k\u00fc\u00e7\u00fckt\u00fcr, bu da negatif elektrotun \u00f6zg\u00fcl kapasitesini etkiler.<\/p>\n<ul>\n<li><strong>K\u00fcresel grafit \u00fcretim ekipmanlar\u0131<\/strong><\/li>\n<\/ul>\n<p>K\u00fcresel grafit \u00fcretimi sanayile\u015fmi\u015ftir. End\u00fcstriyel \u00fcretimde, r\u00fczgar darbeli \u015fekillendirme makineleri esas olarak pul grafiti k\u00fcreselle\u015ftirmek i\u00e7in kullan\u0131l\u0131r. Bunlar aras\u0131nda hava ak\u0131m\u0131 girdapl\u0131 pulverizat\u00f6r yayg\u0131n olarak kullan\u0131lan bir ekipmand\u0131r. Bu y\u00f6ntem, k\u00fcreselle\u015ftirme i\u015flemi s\u0131ras\u0131nda daha az safs\u0131zl\u0131\u011fa sahiptir, ancak ekipman\u0131 boyut olarak b\u00fcy\u00fckt\u00fcr ve grafit miktar\u0131 b\u00fcy\u00fckt\u00fcr ve verim d\u00fc\u015f\u00fckt\u00fcr, bu da laboratuvar haz\u0131rl\u0131\u011f\u0131nda \u00e7ok s\u0131n\u0131rl\u0131d\u0131r.<\/p>\n<h4>K\u00fcresel grafitin modifikasyonu<\/h4>\n<p>De\u011fi\u015fiklik i\u00e7in iki ana ba\u015flang\u0131\u00e7 \u200b\u200bnoktas\u0131 vard\u0131r:<\/p>\n<p>1. SEI filminin a\u015f\u0131r\u0131 vuru\u015funun neden oldu\u011fu geri d\u00f6n\u00fc\u015f\u00fc olmayan kayb\u0131 ve grafitin laminer soyulmas\u0131na neden olan \u00e7\u00f6z\u00fcc\u00fc molek\u00fcllerinin birlikte g\u00f6m\u00fclmesini azaltmak i\u00e7in ta\u015f de\u011firmenin spesifik y\u00fczey alan\u0131n\u0131 uygun \u015fekilde azalt\u0131n;<\/p>\n<p>2. Grafitin \u015farj ve de\u015farj kapasitesini art\u0131rmak i\u00e7in di\u011fer metal elementleri veya metal olmayanlar\u0131 grafitin i\u00e7ine sokun.<\/p>\n<ul>\n<li><strong>Kaplama y\u00f6ntemi-grafitin \u00e7evrim performans\u0131n\u0131 iyile\u015ftirin<\/strong><\/li>\n<\/ul>\n<p>&#8220;\u00c7ekirdek-kabuk&#8221; model kaplama y\u00f6ntemi, &#8220;\u00e7ekirdek&#8221; olarak grafit malzemeleri kullan\u0131r ve y\u00fczeyi \u00fczerinde amorf bir karbon malzemenin bir &#8220;kabu\u011fu&#8221; kaplan\u0131r. Yayg\u0131n olarak kullan\u0131lan amorf karbon malzemelerinin \u00f6nc\u00fcleri aras\u0131nda fenolik re\u00e7ine, Epoksi re\u00e7ine ve par\u00e7alanm\u0131\u015f karbon bulunur. Amorf karbon malzemelerin katman aral\u0131\u011f\u0131, grafitin d\u0131\u015f y\u00fczeyinde lityum iyonlar\u0131n\u0131n bir tampon tabakas\u0131 olu\u015fturmaya e\u015fde\u011fer olan, i\u00e7indeki lityum iyonlar\u0131n\u0131n dif\u00fczyon performans\u0131n\u0131 art\u0131rabilen grafitten daha b\u00fcy\u00fckt\u00fcr, b\u00f6ylece y\u00fcksek ak\u0131m\u0131 iyile\u015ftirir. Grafit malzemelerin \u015farj ve de\u015farj performans\u0131.<\/p>\n<p>Kaplama y\u00f6ntemi, pilin \u00e7evrim \u00f6mr\u00fcn\u00fc iyile\u015ftirir, ancak mevcut kaplama i\u015fleminin hala belirli sorunlar\u0131 vard\u0131r. \u015eu anda \u00e7\u00f6z\u00fclmesi gereken temel sorun, grafitin d\u0131\u015f\u0131nda ve grafitle iyi bir \u015fekilde birle\u015ftirilmi\u015f eksiksiz, tek tip bir kaplama tabakas\u0131n\u0131n nas\u0131l olu\u015fturulaca\u011f\u0131d\u0131r.<\/p>\n<ul>\n<li><strong>Doping y\u00f6ntemi-grafitin \u015farj ve de\u015farj kapasitesini art\u0131r\u0131n<\/strong><\/li>\n<\/ul>\n<p>Baz\u0131 metalik veya metalik olmayan elementlerin karbon malzemelere dahil edilmesi, karbon elektrotlar\u0131n\u0131n lityum yerle\u015ftirme davran\u0131\u015f\u0131n\u0131 etkileyecek olan karbon mikro yap\u0131s\u0131nda ve elektronik durumda de\u011fi\u015fikliklere neden olacakt\u0131r. \u015eu anda en \u00e7ok ara\u015ft\u0131r\u0131lan, bor, silisyum ve fosforun karbon malzemelere eklenmesidir. Ve di\u011fer unsurlar.<\/p>\n<p>Yayg\u0131n olarak kullan\u0131lan di\u011fer modifikasyon y\u00f6ntemleri: y\u00fczey oksidasyonu, metal tabaka olu\u015fumu, mekanik ta\u015flama<\/p>\n<p>K\u00fcresel grafit malzeme iyi elektriksel iletkenli\u011fe, y\u00fcksek kristalli\u011fe, d\u00fc\u015f\u00fck maliyete, y\u00fcksek teorik lityum yerle\u015ftirme kapasitesine, d\u00fc\u015f\u00fck \u015farj ve de\u015farj potansiyeline ve d\u00fczl\u00fc\u011fe sahiptir. Lityum-iyon pil anot malzemesinin \u00f6nemli bir par\u00e7as\u0131d\u0131r ve yurti\u00e7inde ve yurtd\u0131\u015f\u0131nda lityum-iyon pil \u00fcretimi i\u00e7in bir katot malzemesidir. De\u011fi\u015ftirilen \u00fcr\u00fcn. M\u00fckemmel elektriksel iletkenli\u011fe ve kimyasal stabiliteye, y\u00fcksek \u015farj ve de\u015farj kapasitesine, uzun \u00e7evrim \u00f6mr\u00fcne ve \u00e7evre korumas\u0131na sahiptir.<\/p>\n<p>&nbsp;<\/p>\n<p>Makale kayna\u011f\u0131: \u00c7in Toz A\u011f\u0131<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Grafit (a\u015fa\u011f\u0131da ayn\u0131 olan do\u011fal ta\u015fa at\u0131fta bulunur) metalik olmayan bir mineral kayna\u011f\u0131d\u0131r. Grafit malzemeler, y\u00fcksek s\u0131cakl\u0131k dayan\u0131m\u0131, elektriksel iletkenlik, termal iletkenlik, ya\u011flama, kimyasal kararl\u0131l\u0131k, plastisite ve termal \u015fok direnci gibi \u00e7e\u015fitli \u00f6zel \u00f6zelliklere sahiptir. Bunlar\u0131n aras\u0131nda k\u00fcresel grafit, grafit alan\u0131nda son teknoloji \u00fcr\u00fcn\u00fc bir \u00fcr\u00fcnd\u00fcr ve yeni enerji ara\u00e7lar\u0131, enerji depolama ve \u00e7evre koruma gibi stratejik geli\u015fmekte olan end\u00fcstrilerde kullan\u0131lmaktad\u0131r.<\/p>\n","protected":false},"author":6,"featured_media":112131,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[851],"tags":[],"class_list":["post-112154","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-endustri-haberleri-tr"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/posts\/112154","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/comments?post=112154"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/posts\/112154\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/media\/112131"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/media?parent=112154"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/categories?post=112154"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/tags?post=112154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}