Steps and Process

1. Acquire a proper data acquisition device to measure voltage (DAQ 6009) 2. Establish communication with potentiostat and computer using RS 232C cable and hyperterminal 3. Simulate LabVIEW program through which commands to potentiostat are sent and resulting data (current and voltage) is logged and displayed on a current vs. voltage waveform graph 4. Connect potentiostat to commercial Li-ion batteries to test program

Future Study Connect with customized lab-testing batteries for internal stress measurements

A Pilot Study for Cyclic Voltammetry Experiment of Lithium-ion Battery

Priya D’Amico and Hsiao-Ying Shadow Huang Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC

Introduction and Background

Methods and Results

Discussions and Conclusion

LabVIEW Setup

§  The completed research provides a solid interface and good structure upon which further research on lithium ion batteries will be allowed to take place §  Complete control of Potentiostat from a host computer is made possible through LabVIEW programming; which applies to other devices in addition to potentiostat §  Proper usage of Potentiostat Model 273 requires much research and detailed knowledge of inner workings and command list §  Improvements must be made to code and hardware for more ideal results- RS 232C replaced with GPIB, higher DAQ system §  Modify program to be able to choose voltage range and measure current from DAQ (with resistor)

Project Background: §  Study of mechanical stresses and strains on a lithium-ion

battery to better understand the material degradation related to thermoelectric cycling.

§  Lithium-Ion Batteries: rechargeable batteries where lithium ions move from anode and cathode during discharge and in the opposite direction while charging. Used in most electronics and portable devices. Very light, no memory effect.

§  Applications: Increase life span of battery. Decrease charging time of battery.

Equipment Used: §  A Potentiostat/ Galvanostat Model 273a: §  Aid in conducting electrolysis experiments. §  Controls voltage and current applied to a battery cell. §  Three electrodes: §  Working – controls potentials, measures current. §  Reference – measures potential of working electrode. §  Counter – completes circuit, current flow exits .

§  DAQ 6009 from National Instruments. §  Computer Interface: modified RS 232C cable (serial cable)

with USB connection and a 25 to 9 pin adapter

Acknowledgement The work presented in this poster is supported by the National Science Foundation REU: Engineering the Grid.

Lab Setup

Objective: §  To simulate a cyclic voltammetry experiment

via LabVIEW

Switches Configuration Back panel of potentiostat RS 232C DAQ 6009 (14bit)

§  To be able to control C-rate (current) and choose voltage range for charging and discharging lithium-ion battery.