Net flow of electrons from MNet flow of electrons from to solute solute to m .Ef more negative than Eredox more positive than Eredox more cathodic more anodic

山西师范大学：《现代电化学分析》课程教学大纲（化学专业）

Junction potentials Whenever we change electrolyte or solvent there is a cost in that we create a double layer (electrode)which has a small but often measureable potential We call this potential a junction potential

5 separate events must occur: -O must be successfully transported from bulk solution(mass transport) -O must adsorb transiently onto electrode surface (non-faradaic) CT must occur between electrode and (faradaic)

The Economic Case for Electrochemical Innovation New Horizons in Electrochemical Science and Technology. National Academy Press: Washington, D.C., 1986. copyright P.A.Mabrouk, 2001. All rights

Desired voltage achieved by anode cathode stacking cells (in series) Fuel reformer Natural gas, alcohol

UME's- Advantages Reduced capacitance Low ir drop

Q: What Experiment is This? Excitation Name of experimenttype of excitation time

接管验收流程图: 一、土建承包商 二、各机电设备分承包商

以等物质的量的高锰酸钾和乙酸锰为原料,采用机械化学法制备出弱结晶型α-MnO2超级电容器电极材料.在1.2V电压内,200mA·g-1电流密度下对对称型超级电容器进行恒流充放电测试.采用XRD法、循环伏安及交流阻抗法对充放电前后电极材料的结构以及电化学性能进行表征,首次采用求斜率法对充放电曲线分析.结果表明:超级电容器表现出法拉第电容与双电层电容的双重特征;在循环过程中,电化学惰性物质Mn3O4生成,循环伏安图中氧化还原峰逐渐消失;充放电曲线的法拉第电容特征逐渐消失而接近双电层电容理想曲线;超级电容器的比容量、等效串联电阻发生了对应的变化,其最大电极比容量达到416F·g-1,经过近500次循环后,比容量为220F·g-1