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花樣年華甄鐵蟲(chóng) (正式寫手)
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[求助]
鋰離子擴(kuò)散系數(shù)的計(jì)算 已有2人參與
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各位高手: 最近有一篇文章的審稿意見(jiàn)需要計(jì)算鋰離子擴(kuò)散系數(shù),鄙人屬于初入電化學(xué),對(duì)這方面的知識(shí)不是很了解,希望有牛人幫忙解答一下。 附上審稿意見(jiàn)及所需要參考的文獻(xiàn):The enhanced lithium ion diffusion is considered as one of contributions that are responsible for the outstanding electrochemical performance. Actually the diffusion coefficient of Li-ion can be calculated for the TiO2 control sample and the TiO2/graphene sample of this work. Please calculate and provide the diffusion coefficients from EIS and discuss the trend of the values citing literature that details the calculation method : a. Hydrogenation synthesis of blue TiO2 for high performance lithium ion batteries, J. Phys. Chem. C., 2014, 118, 8824−8830 謝謝大家。 |


鐵蟲(chóng) (正式寫手)

金蟲(chóng) (正式寫手)
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Hi 大家好 對(duì)于阻抗計(jì)算鋰離子擴(kuò)散系數(shù),有一個(gè)比較簡(jiǎn)略的方法, 用公式D = R2T2/2A2n4F4C2σ2. 所有的數(shù)字都是上標(biāo)。 小木蟲(chóng)界面上打不出上標(biāo),所以把冪指數(shù)寫在對(duì)應(yīng)符號(hào)后邊。 在此公式中,D 是所要計(jì)算的鋰離子擴(kuò)散系數(shù), R 氣體常數(shù), 8.314 JK-1mol-1 T 開(kāi)爾文溫度,如果是室溫測(cè)試, T = 298K A 電極面積 n 反應(yīng)過(guò)程中轉(zhuǎn)移的電子數(shù) F 法拉第常數(shù) 96500C/mol σ 是 直線擬合 Z’~ω-1/2的斜率 C 鋰離子體相濃度 可以通過(guò)材料密度推導(dǎo)得出 C = n/V =m/M/V = ρV/M/V = ρ/M 公式中用到的M 的材料的摩爾質(zhì)量 對(duì)應(yīng)兩篇文獻(xiàn) 中文版 英文版 1 WANG X Y, CHENG Q, HUANG T, et al. Effect of Calcination Atmosphere on Li/Ni Disorder and Electrochemical Performance of Layered LiNi0. 5Mn0. 5O2[J]. Acta Physico-Chimica Sinica, 2011, 27(2): 437-442. link: http://www.sciencedirect.com/sci ... i/S0013468611001952 2 Wang X, Hao H, Liu J, et al. A novel method for preparation of macroposous lithium nickel manganese oxygen as cathode material for lithium ion batteries[J]. Electrochimica Acta, 2011, 56(11): 4065-4069. link: http://www.sciencedirect.com/sci ... i/S0013468611001952 祝paper 多多,一切順利 祝大家paper 多多,一切順利 |
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