 |
 |
 |
| 24小時(shí)熱門(mén)版塊排行榜 |
- >論壇更新日志 (3795)
- >導(dǎo)師招生 (571)
- >考研 (552)
- >文獻(xiàn)求助 (149)
- >蟲(chóng)友互識(shí) (55)
- >休閑灌水 (53)
- >考博 (42)
- >碩博家園 (40)
- >招聘信息布告欄 (39)
- >論文道賀祈福 (37)
- >基金申請(qǐng) (24)
- >博后之家 (15)
- >論文投稿 (15)
- >SciFinder/Reaxys (12)
- >綠色求助(高懸賞) (11)
- >找工作 (11)
 |
 |
 |
||
 |
 |
 |
 |
 |
| 5 | 1/1 | 返回列表 |
| 查看: 3449 | 回復(fù): 14 | |||
| 當(dāng)前只顯示滿(mǎn)足指定條件的回帖，點(diǎn)擊這里查看本話(huà)題的所有回帖 | |||
alexanderp金蟲(chóng) (著名寫(xiě)手)
|
[交流]
【分享】科學(xué)家研制新型含碳納米管電池 壽命提高十倍 已有11人參與
|
||
|
科學(xué)家研制新型含碳納米管電池 壽命提高十倍 來(lái)源 科學(xué)網(wǎng)：轉(zhuǎn)自MIT網(wǎng)站 麻省理工學(xué)院科學(xué)家制造新手機(jī)電池的原材料-----含碳納米管 隨著智能手機(jī)在功能性方面的不斷進(jìn)步，電池續(xù)航能力及壽命卻越來(lái)越無(wú)法滿(mǎn)足用戶(hù)的需求。智能手機(jī)用戶(hù)抱怨稱(chēng)，手機(jī)耗電能力就像孩子消耗糖果一樣的迅速。目前，一種全新的便攜式電子產(chǎn)品可充電電池制造科技為解決這一問(wèn)題帶來(lái)曙光，根據(jù)新制造科技制造出來(lái)的電池蓄電力為目前電池的十倍。 麻省理工學(xué)院科學(xué)家發(fā)現(xiàn)在電池一端電極使用含碳納米管可以比現(xiàn)在的鋰電池蓄存更多的電力�？茖W(xué)家們?cè)趯?shí)驗(yàn)室中使用多層含碳納米管制造電池的正極，同時(shí)使用鋰鈦氧化物制造電池的負(fù)極。這種電池充電效率及蓄電能力遠(yuǎn)比目前最高端的鋰電池更優(yōu)良。為驗(yàn)證含碳納米管電池在使用壽命方面的表現(xiàn)，科學(xué)家對(duì)新研發(fā)的含碳納米管電池進(jìn)行1000次充放電實(shí)驗(yàn)。結(jié)果在經(jīng)歷1000次充放電后，含碳納米管電池內(nèi)的物質(zhì)屬性變化極微，電池蓄電力絲毫未見(jiàn)減少。這也就證明，含碳納米管電池?fù)碛斜蠕囯姵馗L(zhǎng)的使用壽命。 對(duì)于使用智能手機(jī)及其他便攜式電子產(chǎn)品的用戶(hù)來(lái)說(shuō)，這無(wú)疑是一個(gè)好消息。但目前這種含碳納米管電池仍?xún)H處于實(shí)驗(yàn)室研發(fā)階段。制約這種新型電池普及的主要原因在于，含碳納米管基板在制成電池電極之前需要在兩種不同的電池溶解液中浸泡，而這一過(guò)程極其費(fèi)時(shí)。麻省理工學(xué)院化學(xué)工程系教授保拉-哈蒙德（Paula Hammond）宣稱(chēng)，她的研究團(tuán)隊(duì)目前正在努力尋找解決這一問(wèn)題的方法。目前提出的最可行解決方法為通過(guò)向含碳納米管基板噴灑可替代性物質(zhì)取代其在電池溶解液中浸泡的耗時(shí)過(guò)程。 相信這種含碳納米管制成的電池在不久的未來(lái)即可上市，屆時(shí)使用智能手機(jī)的用戶(hù)將不再需要為手機(jī)電量不夠等問(wèn)題而費(fèi)神。 http://paper.sciencenet.cn/htmlnews/2010/6/233822.shtm 更多閱讀 麻省理工學(xué)院網(wǎng)站相關(guān)報(bào)道（英文） 特別聲明：本文轉(zhuǎn)載僅僅是出于傳播信息的需要，并不意味著代表本網(wǎng)站觀(guān)點(diǎn)或證實(shí)其內(nèi)容的真實(shí)性；如其他媒體、網(wǎng)站或個(gè)人從本網(wǎng)站轉(zhuǎn)載使用，須保留本網(wǎng)站注明的“來(lái)源”，并自負(fù)版權(quán)等法律責(zé)任；作者如果不希望被轉(zhuǎn)載或者聯(lián)系轉(zhuǎn)載稿費(fèi)等事宜，請(qǐng)與我們接洽。 From left, students Betar Gallant and Seung Woo Lee and professors Yang Shao-Horn and Paula Hammond, in one of the labs where the use of carbon nanotubes in lithium batteries was researched. June 18, 2010 email comment print share Batteries might gain a boost in power capacity as a result of a new finding from researchers at MIT. They found that using carbon nanotubes for one of the battery’s electrodes produced a significant increase — up to tenfold — in the amount of power it could deliver from a given weight of material, compared to a conventional lithium-ion battery. Such electrodes might find applications in small portable devices, and with further research might also lead to improved batteries for larger, more power-hungry applications. To produce the powerful new electrode material, the team used a layer-by-layer fabrication method, in which a base material is alternately dipped in solutions containing carbon nanotubes that have been treated with simple organic compounds that give them either a positive or negative net charge. When these layers are alternated on a surface, they bond tightly together because of the complementary charges, making a stable and durable film. The findings, by a team led by Associate Professor of Mechanical Engineering and Materials Science and Engineering Yang Shao-Horn, in collaboration with Bayer Chair Professor of Chemical Engineering Paula Hammond, are reported in a paper published June 20 in the journal Nature Nanotechnology. The lead authors are chemical engineering student Seung Woo Lee PhD ’10 and postdoctoral researcher Naoaki Yabuuchi. Batteries, such as the lithium-ion batteries widely used in portable electronics, are made up of three basic components: two electrodes (called the anode, or negative electrode, and the cathode, or positive electrode) separated by an electrolyte, an electrically conductive material through which charged particles, or ions, can move easily. When these batteries are in use, positively charged lithium ions travel across the electrolyte to the cathode, producing an electric current; when they are recharged, an external current causes these ions to move the opposite way, so they become embedded in the spaces in the porous material of the anode. In the new battery electrode, carbon nanotubes — a form of pure carbon in which sheets of carbon atoms are rolled up into tiny tubes — “self-assemble” into a tightly bound structure that is porous at the nanometer scale (billionths of a meter). In addition, the carbon nanotubes have many oxygen groups on their surfaces, which can store a large number of lithium ions; this enables carbon nanotubes for the first time to serve as the positive electrode in lithium batteries, instead of just the negative electrode. This “electrostatic self-assembly” process is important, Hammond explains, because ordinarily carbon nanotubes on a surface tend to clump together in bundles, leaving fewer exposed surfaces to undergo reactions. By incorporating organic molecules on the nanotubes, they assemble in a way that “has a high degree of porosity while having a great number of nanotubes present,” she says. Powerful and stable Lithium batteries with the new material demonstrate some of the advantages of both capacitors, which can produce very high power outputs in short bursts, and lithium batteries, which can provide lower power steadily for long periods, Lee says. The energy output for a given weight of this new electrode material was shown to be five times greater than for conventional capacitors, and the total power delivery rate was 10 times that of lithium-ion batteries, the team says. This performance can be attributed to good conduction of ions and electrons in the electrode, and efficient lithium storage on the surface of the nanotubes. In addition to their high power output, the carbon-nanotube electrodes showed very good stability over time. After 1,000 cycles of charging and discharging a test battery, there was no detectable change in the material’s performance. The electrodes the team produced had thicknesses up to a few microns, and the improvements in energy delivery only were seen at high-power output levels. In future work, the team aims to produce thicker electrodes and extend the improved performance to low-power outputs as well, they say. In its present form, the material might have applications for small, portable electronic devices, says Shao-Horn, but if the reported high-power capability were demonstrated in a much thicker form — with thicknesses of hundreds of microns rather than just a few — it might eventually be suitable for other applications such as hybrid cars. While the electrode material was produced by alternately dipping a substrate into two different solutions — a relatively time-consuming process — Hammond suggests that the process could be modified by instead spraying the alternate layers onto a moving ribbon of material, a technique now being developed in her lab. This could eventually open the possibility of a continuous manufacturing process that could be scaled up to high volumes for commercial production, and could also be used to produce thicker electrodes with a greater power capacity. “There isn’t a real limit” on the potential thickness, Hammond says. “The only limit is the time it takes to make the layers,” and the spraying technique can be up to 100 times faster than dipping, she says. Lee says that while carbon nanotubes have been produced in limited quantities so far, a number of companies are currently gearing up for mass production of the material, which could help to make it viable for large-scale battery manufacturing. Yury Gogotsi, professor of materials science at Drexel University, says, “This is an important achievement, because there is a need for energy storage in a thin-film format for powering portable electronic devices and for flexible, wearable electronics. Bridging the performance gap between batteries and electrochemical capacitors is an important task, and the MIT group has made an important step in this direction.” Some uncertainties remain, however. “The electrochemical performance data presented in the article may only be valid for relatively thin films with no packaging,” Gogotsi says, pointing out that the measured results were for just the individual electrode, and results might be different for a whole battery with its multiple parts and outer container. “The question remains whether the proposed approach will work for much thicker conventional electrodes, used in devices that are used in hybrid and electric cars, wind power generators, etc.” But, he adds, if it does turn out that this new system works for such thicker electrodes, “the significance of this work will increase dramatically.” http://web.mit.edu/newsoffice/2010/batteries-nanotubes-0621.html [ Last edited by alexanderp on 2011-1-4 at 14:30 ] |
回復(fù)此樓» 猜你喜歡
招生負(fù)責(zé)_院士團(tuán)隊(duì)_學(xué)生高自由度成長(zhǎng)_擅長(zhǎng)學(xué)生培養(yǎng)
已經(jīng)有5人回復(fù)
-
溫州大學(xué)招收2026年入學(xué)博士研究生（化學(xué)、材料、環(huán)境）
已經(jīng)有10人回復(fù)
-
金屬材料論文潤(rùn)色/翻譯怎么收費(fèi)?
已經(jīng)有298人回復(fù)
-
非晶合金
已經(jīng)有2人回復(fù)
-
院士團(tuán)隊(duì)-每屆學(xué)生都優(yōu)秀-高自由度-團(tuán)隊(duì)氛圍好
已經(jīng)有0人回復(fù)
-
求調(diào)劑
已經(jīng)有3人回復(fù)
-
化工學(xué)院（學(xué)院正式調(diào)劑群+聯(lián)系方式）
已經(jīng)有0人回復(fù)
-
化工學(xué)院（學(xué)院官方群）-院士團(tuán)隊(duì)招生-學(xué)生自由度高-培養(yǎng)模式成熟高效
已經(jīng)有0人回復(fù)
-
黑龍江大學(xué)分析化學(xué)招調(diào)劑
已經(jīng)有0人回復(fù)
-
武漢高校國(guó)家級(jí)人才團(tuán)隊(duì)招收材料，化學(xué)，紡織等專(zhuān)業(yè)碩士調(diào)劑生
已經(jīng)有26人回復(fù)
-
紡大化工學(xué)院（官方群）-院士團(tuán)隊(duì)招生-學(xué)生自由度高發(fā)展好-培養(yǎng)模式成熟
已經(jīng)有0人回復(fù)
» 本主題相關(guān)商家推薦: (我也要在這里推廣)
» 本主題相關(guān)價(jià)值貼推薦，對(duì)您同樣有幫助:
- 美證實(shí)碳納米管生長(zhǎng)控制理論-幾篇相關(guān)理論和實(shí)驗(yàn)論文
已經(jīng)有116人回復(fù)
- “鋰離子、鋰空電池納米電極”Mater. Sci. Eng., R （IF>17）2011綜述
已經(jīng)有331人回復(fù)
- 3.22文獻(xiàn)解讀：三元材料在高能量密度鋰離子電池中的應(yīng)用
已經(jīng)有236人回復(fù)
- 國(guó)外鋰離子電池大牛---一個(gè)個(gè)來(lái)，慢慢統(tǒng)計(jì)，個(gè)人能力有限，有資源的同志一起努力
已經(jīng)有296人回復(fù)
- 分享一篇ATK計(jì)算金納米管（分子修飾）的輸運(yùn)計(jì)算
已經(jīng)有95人回復(fù)
- 硅基薄膜太陽(yáng)電池概述
已經(jīng)有60人回復(fù)
- 科學(xué)家通過(guò)化學(xué)反應(yīng)改變碳納米管內(nèi)部結(jié)構(gòu)-《自然— 化學(xué)》雜志
已經(jīng)有41人回復(fù)
- 自己總結(jié)的關(guān)于鋰離子電池的基礎(chǔ)知識(shí)及研究現(xiàn)狀
已經(jīng)有894人回復(fù)
- 請(qǐng)問(wèn)硬質(zhì)合金 鎢粉碳化的 配碳計(jì)算怎么算
已經(jīng)有5人回復(fù)
- 請(qǐng)教一下有哪個(gè)公司的碳納米管做得好（在鋰電池行業(yè)已經(jīng)有應(yīng)用的）？
已經(jīng)有10人回復(fù)
- 鎳氫電池低溫放電問(wèn)題
已經(jīng)有3人回復(fù)
- nature nanotechnology最新碳納米管TiO2復(fù)合材料用于太陽(yáng)能電池
已經(jīng)有126人回復(fù)
- 【求助】碳納米管沉鉑后（共含鉑50%）CV測(cè)試電流密度只有0.002A/cm2
已經(jīng)有9人回復(fù)
- 【分享】科學(xué)家首次在碳納米管中觀(guān)察到場(chǎng)致發(fā)光
已經(jīng)有5人回復(fù)
alexanderp
金蟲(chóng) (著名寫(xiě)手)
- 應(yīng)助: 19 (小學(xué)生)
- 金幣: 220.4
- 散金: 5554
- 紅花: 13
- 帖子: 2266
- 在線(xiàn): 557.4小時(shí)
- 蟲(chóng)號(hào): 822199
- 注冊(cè): 2009-08-04
- 專(zhuān)業(yè): 其他無(wú)機(jī)非金屬材料
|
謝謝關(guān)注！ 轉(zhuǎn)載 其報(bào)道收到的評(píng)論 Comments Log in to write comments YESICAN - wow that's awesome 2010-06-21 07:12:45 That's really a great find. jjones 2010-06-22 04:32:27 How does this differ from work that has been published by Stanford researchers?? http://www.gizmag.com/silicon-nanotubes/12947/ jfx 2010-06-24 02:03:17 This Article: - uses Carbon nanotubes - made both anode and cathode out of same material - tested for 1000 cycles without loss - has a plan for low-cost, large-scale manufacturing 2009 Stanford Article: - Silicon based - Only made Anodes, not Cathodes, and thus was limited by conventional cathodes - only tested for 100 cycles - at the time of the article, did not mention anything about manufacturing cost/efficiency sky1986 2010-07-12 06:34:06 You have made the right comparison lupengcheng2025 2010-06-22 04:31:36 great invent! jorge333manrique - Wow 2010-06-22 04:31:29 Great Achievement... and good article Congrats mies83 - Good work people 2010-06-22 04:30:56 I'm so glad that you find this better solution for batteries. Let go for better world with high speed elektic cars for everyone and cleaner nature environment. Good work, greeting Michel Dierks The Netherlands etam 2010-06-22 11:52:32 great invention!! ERICK - Congratulations!!! 2010-06-23 06:27:53 I think that this is a wonderful invention. Thanks for the inspiration inside my mind. plasalex - best wishes cooperation 2010-06-24 09:30:31 It is all very interestingly. But we did it 5-6 years ago. We did engineering samples lithium-ionic of secondary generators with the carbon Nanotubes handled in plasma. The specific-capacitance compounded more than 2000 mA hour per gramme activ mass. The thin flexible secondary generators. We are small private company "PLASMAS", St.-Petersburg, Russia. For us it is taken out a patent for in Russia and the request for the international patent is given. We can consider various operations on Nanomaterials and on plasma treatment of stuffs. We have wide experience and many interesting operations. Cooperation is interesting to us. We wish success for you. About respect Alexander juamiso - good but, we need energy density 2010-06-28 06:55:14 The outcome of your research is really interesting, however I understand by reading it that this new technology gives 5x the energy density of conventional capacitors and 10x the power of Li-ion batteries. That's a good breakthrough. Congratulations. We are working in BEV and RangeExtender cars, and what it mostly stops the industry now is the low energy density from Li-ion based batteries together with its high price. Please improve the relation price-weight-energy density! The world needs you  Best regards from Germany. |
9樓2011-01-18 13:05:33
  |
2樓2011-01-03 00:43:23
NASA5797
木蟲(chóng) (正式寫(xiě)手)
- 應(yīng)助: 1 (幼兒園)
- 金幣: 1686.7
- 散金: 90
- 紅花: 2
- 帖子: 458
- 在線(xiàn): 56.7小時(shí)
- 蟲(chóng)號(hào): 786628
- 注冊(cè): 2009-06-04
- 性別: GG
- 專(zhuān)業(yè): 應(yīng)用高分子化學(xué)與物理
3樓2011-01-04 09:55:28
380677864
木蟲(chóng) (正式寫(xiě)手)
- 應(yīng)助: 0 (幼兒園)
- 金幣: 2121.9
- 散金: 479
- 帖子: 423
- 在線(xiàn): 178.4小時(shí)
- 蟲(chóng)號(hào): 1093260
- 注冊(cè): 2010-09-08
- 性別: GG
- 專(zhuān)業(yè): 電工材料特性及其應(yīng)用
4樓2011-01-04 10:54:20
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 求調(diào)劑，一志愿:南京航空航天大學(xué)大學(xué) ，080500材料科學(xué)與工程學(xué)碩，總分289分 +6 | @taotao 2026-03-19 | 6/300 |
|
|---|---|---|---|---|
|
|
[考研] 085601求調(diào)劑總分293英一數(shù)二 +3 | 鋼鐵大炮 2026-03-24 | 3/150 |
|
|
|
[考研] 材料調(diào)劑 +6 | 匹克i 2026-03-23 | 6/300 |
|
|
|
[考研] 0854AI CV方向招收調(diào)劑 +3 | 章小魚(yú)567 2026-03-23 | 3/150 |
|
|
[考研] 306求0703調(diào)劑一志愿華中師范 +10 | 紙魚(yú)ly 2026-03-21 | 11/550 |
|
|
|
[考研] 292求調(diào)劑 +4 | 鵝鵝鵝額額額額?/a> 2026-03-24 | 4/200 |
|
|
|
[考研] 307求調(diào)劑 +5 | 超級(jí)伊昂大王 2026-03-24 | 5/250 |
|
|
|
[考研] 一志愿北京化工大學(xué)材料與化工 264分各科過(guò)A區(qū)國(guó)家線(xiàn) +3 | 哈哈157349 2026-03-21 | 3/150 |
|
|
|
[考研] 一志愿華東理工大學(xué)081700，初試分?jǐn)?shù)271 +5 | kotoko_ik 2026-03-23 | 6/300 |
|
|
|
[考研] 341求調(diào)劑(一志愿湖南大學(xué)070300) +5 | 番茄頭--- 2026-03-22 | 6/300 |
|
|
|
[考研] 材料專(zhuān)業(yè)求調(diào)劑 +11 | hanamiko 2026-03-18 | 11/550 |
|
|
|
[考研] 一志愿重慶大學(xué)085700資源與環(huán)境，總分308求調(diào)劑 +7 | 墨墨漠 2026-03-23 | 8/400 |
|
|
|
[考研] 276求調(diào)劑 +3 | YNRYG 2026-03-21 | 4/200 |
|
|
|
[考研] 求調(diào)劑院校信息 +6 | CX 330 2026-03-21 | 6/300 |
|
|
|
[考研] 一志愿南大，0703化學(xué)，分?jǐn)?shù)336，求調(diào)劑 +3 | 收到VS 2026-03-21 | 3/150 |
|
|
|
[考研] 336求調(diào)劑 +5 | rmc8866 2026-03-21 | 5/250 |
|
|
|
[考研] 南昌大學(xué)材料專(zhuān)碩311分求調(diào)劑 +6 | 77chaselx 2026-03-20 | 6/300 |
|
|
|
[考研] 材料學(xué)碩297已過(guò)四六級(jí)求調(diào)劑推薦 +11 | adaie 2026-03-19 | 11/550 |
|
|
|
[考研] 353求調(diào)劑 +3 | 拉鉤不許變 2026-03-20 | 3/150 |
|
|
|
[考研] 招收調(diào)劑碩士 +4 | lidianxing 2026-03-19 | 12/600 |
|