焦耳小偷和原电池那些事

哦~豆浆流出来咯~ 孩子不懂事做着玩的~

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锌银和锌锰原电池的土法制作及测试

0x000000002023/05/31 23:09:55焦耳小偷和原电池那些事

关键词

原电池

一，原料

电池由正负极板构成，负极板发生氧化反应一般是各类金属单质作为电极活性物质，由于金属的优良导电性所以电极活性物质亦是集流体。正极板发生还原反应一般是各类金属氧化物作为电极活性物质，且由于氧化物多为粉末且导电性差，一般需要将其和导电助剂（活性炭，石墨等）与粘结剂混合制成正极涂膏，涂敷于正极集流体并烘干制成。

由此选择二氧化锰粉末和锌片与银粉和锌片组合分别作为锌锰电池与锌银电池的电极物活性质，选择聚偏二氟乙烯（PVDF）作为粘结剂，N-甲基吡咯烷酮（NMP）作为溶剂，乙炔黑作为导电助剂，氢氧化钾作为电解质。

二，土法制备

对于锌锰电池，负极直接将锌片裁剪合适尺寸即可。正极可选择石墨片或者银片作为集流体。将二氧化锰，乙炔黑和PVDF均匀混合，并加入适量NMP不断搅拌直到混合物呈现均一且较为粘稠为止。将集流体表面清洁干净并蘸取适量正极涂膏均匀涂布，随后高温烘干（吹风机，热风枪，电烫斗等都可，注意有机溶剂蒸汽有毒避免吸入）。该过程可重复多次，沉积的活性物质就决定放电容量。对于锌银电池，上述步骤一样，只是将二氧化锰换成银粉。

三，充放电

对于锌锰电池，组装完成后注入电解液既有电可直接进行放电。对于锌银电池，需要进行小电流活化，将正极板涂膏内的银单质转化成氧化银才能放电。实验发现锌银电池内阻低放电速度快但容量较低，很快耗尽，锌锰电池内阻很大，放电速度较慢，但是能放出较多电量。

四，实物及效果展示

锌锰电池驱动焦耳小偷：

VID_20230531_211221.mp4 点击下载 ‎

锌银电池开路电压：

锌银电池正极板特写：

锌银电池驱动焦耳小偷：

[修改于 1 年前 - 2023/05/31 23:09:55]

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robinsondong 十步芳草

十步芳草

1年5个月前 IP:陕西

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要是低成本能搞铅蓄电池，那么二手的太阳能电池板就可以玩玩了！

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