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北京石油化工学院2026年研究生招生接收调剂公告
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wzhhust

木虫 (著名写手)

[交流] 【求助】应用 EIS 或者 CV 方法来估算 Li+扩散系数

请大家看看以下的公式:
he inclined lines in the low frequency range are attributed to a Warburg impedance, which may be associated with lithium-ion diffusion within the LiFePO4 electrode. . From the inclined lines in the Warburg region, the lithium-ion diffusion coefficient may be estimated using the following equation:
        D = (R2T2)/(2A2n4F4C22)
Where R is the gas constant, T is the absolute temperature, A is the surface area of the cathode, n the number of electrons per molecule during oxidization, F the Faraday constant,
C the concentration of lithium-ion (7.69 × 10−3 mol cm−3),
请问 C 是如何算出来的,谢谢啊,本人计算很久了,很迷茫,请虫虫帮帮。(公式考过来上下标有问题,应该不影响我想问的问题)
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flashpoint

金虫 (小有名气)

wzhhust(金币+3):谢谢,怎么算出来的还是不对,汗 2010-11-06 15:02:37
引用回帖:
Originally posted by wzhhust at 2010-11-05 22:33:06:
请大家看看以下的公式:
he inclined lines in the low frequency range are attributed to a Warburg impedance, which may be associated with lithium-ion diffusion within the LiFePO4 electrode. . From t ...

指的是固相Li的摩尔浓度,算算1mol LiFePO4的质量,除以密度就是体积,倒数就是摩尔浓度。
2楼2010-11-06 03:04:22
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Ontheway3101

木虫 (正式写手)

学习了,谢谢!
人生就是条路,我祝愿我们一直在路上.
3楼2010-11-19 09:31:54
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