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htl1986

金虫 (小有名气)

闪光的锄头

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专业: 电能储存与节电技术

还有借问楼上的漏电一般是什么原因引起的啊，怎么去除这种现象呢

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11楼2011-07-08 11:35:28

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格格11

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Originally posted by dtingx at 2011-07-08 11:22:46:
漏电和自放电是一回事嘛？有什么办法可以看出是漏电电流比较大造成的？谢谢！你点应助回帖，我可以给你金币。嘿嘿

看看你的CV是否上翘（或有什么峰）。还有你的充放电曲线的对称性如何。
呵呵，谢谢你的金币。留下给别的高手吧。

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12楼2011-07-08 11:45:57

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格格11

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Originally posted by htl1986 at 2011-07-08 11:35:28:
还有借问楼上的漏电一般是什么原因引起的啊，怎么去除这种现象呢

Conway总结了几大原因：【Journal of Power Sources 135 (2004) 332–343】

(a) Self-discharge at electrodes which have been polarized to overcharge potentials, i.e. beyond potentials corresponding to the thermodynamic decomposition potential
of the solution.

(b) Self-discharge by parasitic processes involving Faradaic impurity reactions (sometimes redox shuttle processes [2]) that can be cathodic or anodic, and may
be diffusion-controlled.

(c) Apparent self-discharge, over relatively short times, following interruption of polarizing currents at porous-C electrodes due to non-uniformity of charge acceptance
down and amongst pores. This can be experimentally observed and physically simulated in the behavior of hardware, multi-element C/R circuits.

(d) A different origin of self-discharge behavior arises at some two-electrode battery configurations where products of charging or corrosion at one electrode become
transferred, by diffusion, to the other electrode which then suffers time-dependent depolarization.

(e) Finally, a more trivial origin of self-discharge can be short-circuit leakage currents between adjacent cathodes and anodes in imperfectly sealed bipolar electrode configurations.

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13楼2011-07-08 12:02:25

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