{"id":4155,"date":"2015-10-05T11:10:22","date_gmt":"2015-10-05T04:10:22","guid":{"rendered":"http:\/\/ttud.com.vn\/?p=4155"},"modified":"2017-09-28T22:45:25","modified_gmt":"2017-09-28T15:45:25","slug":"dh-california-che-tao-pin-voi-anode-lam-tu-nam-hieu-suat-cao-hon-tuoi-tho-tang-theo-thoi-gian","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/dh-california-che-tao-pin-voi-anode-lam-tu-nam-hieu-suat-cao-hon-tuoi-tho-tang-theo-thoi-gian\/","title":{"rendered":"\u0110H California ch\u1ebf t\u1ea1o pin v\u1edbi anode l\u00e0m t\u1eeb n\u1ea5m: hi\u1ec7u su\u1ea5t cao h\u01a1n, tu\u1ed5i th\u1ecd t\u0103ng theo th\u1eddi gian"},"content":{"rendered":"

C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u1ebfn t\u1eeb \u0110\u1ea1i h\u1ecdc California, Riverside v\u1eeba ch\u1ebf t\u1ea1o th\u00e0nh c\u00f4ng m\u1ed9t lo\u1ea1i pin m\u1edbi v\u1edbi b\u1ed9 anode \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p t\u1eeb da c\u1ee7a lo\u00e0i n\u1ea5m Portabella. Kh\u00f4ng nh\u1eefng gi\u1ea3m chi ph\u00ed s\u1ea3n xu\u1ea5t, \u00edt g\u00e2y t\u1ed5n h\u1ea1i \u0111\u1ebfn m\u00f4i tr\u01b0\u1eddng, th\u1ebf h\u1ec7 pin n\u00e0y c\u00f2n cho c\u00f4ng su\u1ea5t l\u1edbn h\u01a1n nh\u1eefng g\u00ec mong \u0111\u1ee3i.<\/strong><\/p>\n

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Nh\u01b0 ch\u00fang ta \u0111\u00e3 bi\u1ebft, pin bao g\u1ed3m 3 th\u00e0nh ph\u1ea7n ch\u00ednh: c\u1ef1c \u00e2m (cathode), c\u1ef1c d\u01b0\u01a1ng (anode) v\u00e0 m\u1ed9t ch\u1ea5t r\u1eafn ho\u1eb7c l\u1ecfng \u0111\u1eb7c bi\u1ec7t (ch\u1ea5t \u0111i\u1ec7n ph\u00e2n). Graphite t\u1ed5ng h\u1ee3p (than ch\u00ec) th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng cho c\u00e1c anode trong pin lithium-ion, th\u1ebf nh\u01b0ng v\u1eadt li\u1ec7u n\u00e0y \u0111\u1ec3 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng th\u00ec \u0111\u00f2i h\u1ecfi ph\u1ea3i \u0111\u01b0\u1ee3c l\u00e0m s\u1ea1ch b\u1edfi c\u00e1c h\u00f3a ch\u1ea5t nh\u01b0 axit flohydric hay sulfuric. Qu\u00e1 tr\u00ecnh n\u00e0y kh\u00f4ng ch\u1ec9 t\u1ed1n k\u00e9m m\u00e0 c\u00f2n t\u1ea1o ra ch\u1ea5t th\u1ea3i nguy h\u1ea1i cho m\u00f4i tr\u01b0\u1eddng.<\/p>\n

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Mihri v\u00e0 Cengiz Ozkan, 2 gi\u00e1o s\u01b0 \u0111\u1ebfn t\u1eeb \u0110\u1ea1i h\u1ecdc California, Riverside.<\/em>\u200b<\/p>\n

Ch\u00ednh v\u00ec l\u1ebd \u0111\u00f3, c\u00e1c nh\u00e0 khoa h\u1ecdc t\u1ea1i UC Riverside r\u1ea5t mu\u1ed1n kh\u00e1m ph\u00e1 nh\u1eefng ti\u1ec1m n\u0103ng m\u00e0 n\u1ea5m portabella c\u00f3 th\u1ec3 mang l\u1ea1i, trong n\u1ed7 l\u1ef1c t\u00ecm ki\u1ebfm ngu\u1ed3n nguy\u00ean li\u1ec7u thay th\u1ebf t\u1ef1 nhi\u00ean h\u01a1n, th\u00e2n thi\u1ec7n h\u01a1n. Nh\u01b0ng v\u00ec sao l\u1ea1i l\u00e0 n\u1ea5m portabella m\u00e0 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t lo\u00e0i n\u00e0o kh\u00e1c? Nh\u00f3m nghi\u00ean c\u1ee9u cho ch\u00fang ta 2 l\u00fd do \u0111\u1ed1i v\u1edbi th\u1eafc m\u1eafc n\u00e0y.<\/p>\n

Th\u1ee9 nh\u1ea5t, m\u1ed9t s\u1ed1 nghi\u00ean c\u1ee9u tr\u01b0\u1edbc \u0111\u00f3 \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng n\u1ea5m c\u00f3 \u0111\u1ed9 x\u1ed1p cao, ch\u00ednh l\u00e0 thu\u1ed9c t\u00ednh h\u1ea5p d\u1eabn cho vi\u1ec7c s\u1ea3n xu\u1ea5t pin. Nguy\u00ean do l\u00e0 v\u00ec c\u00e1c l\u1ed7 nh\u1ecf x\u00edu trong c\u1ea5u tr\u00fac c\u1ee7a n\u00f3 cho ph\u00e9p l\u01b0u tr\u1eef, truy\u1ec1n t\u1ea3i n\u0103ng l\u01b0\u1ee3ng d\u1ec5 d\u00e0ng, \u0111\u1ed3ng th\u1eddi c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t. Th\u1ee9 hai, n\u1ea5m portabella c\u00f3 ch\u1ee9a h\u00e0m l\u01b0\u1ee3ng cao c\u00e1c lo\u1ea1i mu\u1ed1i kali, l\u00e0m cho c\u00e1c l\u1ed7 nh\u1ecf n\u00f3i tr\u00ean \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t theo th\u1eddi gian th\u1ef1c, ngh\u0129a l\u00e0 c\u00f3 th\u1ec3 ti\u1ebfp x\u00fac v\u1edbi ch\u1ea5t \u0111i\u1ec7n li trong pin thu\u1eadn l\u1ee3i trong m\u1ed7i chu k\u1ef3 ph\u00f3ng ho\u1eb7c t\u00edch \u0111i\u1ec7n. \u0110i\u1ec1u n\u00e0y \u0111\u00f3ng vai tr\u00f2 r\u1ea5t l\u1edbn trong vi\u1ec7c th\u00fac \u0111\u1ea9y c\u00f4ng su\u1ea5t pin.<\/p>\n

C\u00e1c nh\u00e0 khoa h\u1ecdc nh\u1eadn th\u1ea5y ph\u1ea7n da t\u1eeb n\u1eafp c\u1ee7a n\u1ea5m portabella khi \u0111\u01b0\u1ee3c l\u00e0m n\u00f3ng \u0111\u1ebfn 500\u00b0C s\u1ebd bi\u1ebfn th\u00e0nh m\u1ed9t c\u1ea5u tr\u00fac g\u1ecdi l\u00e0 nanoribbon, t\u01b0\u01a1ng t\u1ef1 nh\u01b0 carbon c\u00f3 ngu\u1ed3n g\u1ed1c t\u1ef1 nhi\u00ean. T\u0103ng nhi\u1ec7t \u0111\u1ed9 l\u00ean 1.100\u00b0C, ng\u01b0\u1eddi ta th\u1ea5y ph\u1ea7n da n\u1ea5m ban \u0111\u1ea7u chuy\u1ec3n th\u00e0nh m\u1ed9t m\u1ea1ng l\u01b0\u1edbi carbon nanoribbon k\u1ebft n\u1ed1i v\u1edbi nhau, m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u \u0111\u1ed9c \u0111\u00e1o c\u00f3 th\u1ec3 th\u00edch h\u1ee3p cho vi\u1ec7c thi\u1ebft k\u1ebf pin t\u1eeb \u0111\u00f3 ra \u0111\u1eddi. V\u1edbi nh\u1eefng g\u00ec quan s\u00e1t \u0111\u01b0\u1ee3c, nh\u00f3m nghi\u00ean c\u1ee9u cho r\u1eb1ng n\u1ebfu \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a, carbon sinh ra t\u1eeb n\u1ea5m ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 thay th\u1ebf than ch\u00ec, trong vai tr\u00f2 l\u00e0 c\u1ef1c d\u01b0\u01a1ng c\u1ee7a pin.<\/p>\n

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“V\u1edbi v\u1eadt li\u1ec7u m\u1edbi, th\u1eddi gian s\u1eed d\u1ee5ng pin c\u1ee7a \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng trong t\u01b0\u01a1ng lai c\u00f3 th\u1ec3 s\u1ebd gia t\u0103ng sau nhi\u1ec1u l\u1ea7n s\u1ea1c, thay v\u00ec gi\u1ea3m nh\u01b0 hi\u1ec7n nay\u201d, Brennan Campbell – m\u1ed9t sinh vi\u00ean thu\u1ed9c \u0111\u1ea1i h\u1ecdc UC Riverside cho bi\u1ebft. Hi\u1ec7n c\u00e1c nh\u00e0 khoa h\u1ecdc v\u1eabn ch\u01b0a th\u1ec3 \u0111\u01b0a ra th\u1eddi \u0111i\u1ec3m ch\u00ednh x\u00e1c m\u00e0 lo\u1ea1i pin m\u1edbi \u0111\u01b0\u1ee3c xu\u1ea5t x\u01b0\u1edfng. Song, v\u1edbi nh\u1eefng g\u00ec \u0111\u00e3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7n t\u1ea1i, vi\u1ec7c cho ra l\u00f2 m\u1ed9t th\u1ebf h\u1ec7 pin l\u00e0m t\u1eeb v\u1eadt li\u1ec7u sinh h\u1ecdc h\u1eefu c\u01a1 gi\u00e1 r\u1ebb, th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng v\u00e0 d\u1ec5 d\u00e0ng s\u1ea3n xu\u1ea5t ho\u00e0n to\u00e0n kh\u1ea3 thi.<\/p>\n

Ngu\u1ed3n: \u0110\u1ea1i h\u1ecdc California, Riverside\u200b<\/strong><\/p>\n

Ngu\u1ed3n tinhte.vn<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u1ebfn t\u1eeb \u0110\u1ea1i h\u1ecdc California, Riverside v\u1eeba ch\u1ebf t\u1ea1o th\u00e0nh c\u00f4ng m\u1ed9t lo\u1ea1i pin m\u1edbi v\u1edbi b\u1ed9 anode \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p t\u1eeb da c\u1ee7a lo\u00e0i n\u1ea5m Portabella. Kh\u00f4ng nh\u1eefng gi\u1ea3m chi ph\u00ed s\u1ea3n xu\u1ea5t, \u00edt g\u00e2y t\u1ed5n h\u1ea1i \u0111\u1ebfn m\u00f4i tr\u01b0\u1eddng, th\u1ebf h\u1ec7 pin n\u00e0y c\u00f2n cho c\u00f4ng su\u1ea5t l\u1edbn h\u01a1n […]<\/p>\n","protected":false},"author":17,"featured_media":4356,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-4155","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/4155","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=4155"}],"version-history":[{"count":4,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/4155\/revisions"}],"predecessor-version":[{"id":4359,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/4155\/revisions\/4359"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media\/4356"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=4155"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=4155"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=4155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}