Citation: Xiang Qin LIN, Liang Dong FENG. The In-cell iR Compensation Using a Four-electrode System[J]. Chinese Chemical Letters, ;2006, 17(5): 703-706. shu

The In-cell iR Compensation Using a Four-electrode System

University of Science and Technology of China, Hefei 230026

Received Date: 10 November 2005

Fund Project: This work is financially supported by NNSFC (No. 20173054).

A novel idea of in-cell iR compensation was proposed by using a four-electrode electrochemical system, which was consisted of two working electrodes, one reference electrode (RE)and one auxiliary electrode (AE). One of the two working electrodes was called the auxiliary working electrode (AWE), which was directly connected to the ground. Another working electrode was used as a regular working electrode (WE) for electrochemical testing. The reference electrode was set in a frit close to the AWE for potential sampling. The other electrodes, WE, RE and AE, were connected to a conventional potentiostat of three-electrode system for electrochemical measurements. A linear narrow electrochemical cell was designed for setting AE at one end and AWE with RE at another end, and setting WE in between AE and AWE. In this way, a positive feedback potential was generated at the working electrode from the solution resistance and the current flow in the solution. An formal iR compensation over 100%, as high as 500%, had been achieved without potential oscillation. The electrochemical cell design, the principle of the in-cell iR compensation, and the preliminary voltammetric characterization by using the redox reaction of ferrocyanide anions were reported.
- In-cell,
- iR compensation,
- four-electrode system,
- cell design,
- cyclic voltammetry
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