部分吃掉， : : 我在看一些论文时，看到很多测试电极材料时 : : 常会用这材料做成电极的电池去做循环伏安图 : : 为什麽测试电池会用到CV图，那，怎样的CV图呈现表示电池电性很好? : : 又，CV图可以看出电池的电容量吗? : : 推 kriz:你是指测试电极材料还是测电池电容，有差别 09/13 22:55 : 推 richbank:通常会将CV curve 转成 Voltage VS. Specific capacity 09/14 00:17 : → richbank:去看电极材料的充放电平台与电容量大小 可由充放电平台 09/14 00:19 : → richbank:去了解到 材料在充放电过程中的相变化 而电容量看大小及 09/14 00:22 : → richbank:随循环次数衰退的速度 09/14 00:24 : → richbank:衰退越慢 该电极材料就越好 与材料的结构和粒径有关 09/14 00:27 : → richbank:另外阴阳极材料在作充放电测试时给定的截止电压及C-rate 09/14 00:29 : → richbank:也有所不同 C-rate的快慢也会影响到衰退速度 其他细节 09/14 00:32 : → richbank:可能要从你要做的材料去做判断 09/14 00:34 : → shiaushiau:回一楼，是测量电池电容，他们的差别在哪边? 09/14 16:13 : → shiaushiau:回二楼，谢谢你的解说~ 09/14 16:14 Generally speaking, the CV measurements for catalytic electrode materials focus on the on-set potential, peak potential/current, integrated area (e.g. hydrogen adsorption) and etc., which imply the intrinsic catalyst activity and mechanism of your catalysts. Sometimes in-situ experiment is needed to verify the intermediate if necessary. Scan rate does introduce certain contribution in the result, here I mean the CV diagram, and many books has already gone into the detail of this effect even thought that may not so important you right now. I have to confess that I'm not so familiar with the term "c-rate", and why Mr.Richbank mentioned the measurement charge/discharge of anodic/cathodic material, as that makes no sense and sounds odd to me. Since electrochemical capacitor is not what I specialize in, and Mr.Richbank provides many useful information for you, so I shouldn't go into the details. Based on these info., you can easily notice the purposes of CV for capacitor and electrode material are quite differnt. --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 203.67.101.219