Dr. Pierrot S. Attidekou RA Newcastle University

Transcription

1 Dr. Pierrot S. Attidekou RA Newcastle University

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3 Research collaboration between 2 schools: CEAM & EEE School of Chemical Engineering and Advance Materials School of Electrical and Electronic Engineering Research on LiB s technology and safety.

4 Electrochemical System for Energy & storage Lithium ion batteries (LiB) Lithium Air, lithium sulfur batteries Fuel Cell (PEMFC), etc. Catalyst materials for energy and water treatment (Ozone generation)

5 Non destructive testing techniques. Dramatic decrease in testing time. Diagnose State of Health (SoH) Fault analysis and prediction. LiB s Lifetime assessment and prediction. Simulation

6 As a result: we have developed rapid electronic system for quality control of LiB s on production line. Using Electrochemical Impedance Spectroscopy (EIS)

7 Non destructive, real-time test platform for detecting viable, or non viable, lithium battery: typically in < 1 min. Use of EIS Processing algorithms for detecting non viable cells. Configurable for non-specific cell manufacturer technology. (no need to know chemistry IP/ confidentiality) Modelling and characterisation of cells for potential fault diagnosis

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9 Ewe/V I/mA Voltage profile 40, , Current profile 0-20, , , , , ,000 time/s ) Cycling; 2) Dynamic Stress Test (DST); 3) Pulse discharge

10 dq/dv (mah / V) GITT inspired graph (discharge) Initial Capacity fade after 200 cycles After 200 cycles Plot 14 Plot Voltage (mv)

11 -Im(Z)/Ohm Before After % SOC 80% SOC Re(Z)/Ohm

12 -Im(Z)/Ohm Simulation O Experimental data χ 2 = 4.515x10-9 Δ Z (%) = 0.5% 0% SOC Re(Z)/Ohm 0.003

13 log ( Z /Ohm) Phase(Z)/deg log (freq/hz) 1-20

14 Log(τ /s) SOC [%] (-O-) battery 1 (-Δ- ) battery 2 τ = RC = (RQ) 1/n

15 τ = RC = (RQ) 1/n : first estimation of battery dynamic behaviour C dl = τ / R ct (C dl is the double layer capacitance and R ct is the charge transfer resistance) Larger τ, the slower the voltage changes Smaller τ, the faster the voltage changes The variation of the minimum of τ vs SOC is related to ageing.

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17 Investigate new materials/systems for better capacity, energy storage and safety Batteries manufacturers Cars manufacturers R&D collaborative Projects

18 A study of 40Ah lithium ion batteries at zero percent state of charge as function of temperature. Pierrot S. Attidekou 1, Simon Lambert 2, Matthew Armstrong 2, James Widmer 2, Keith Scott 1, Paul A. Christensen 1. J. Power Sources 269 (2014) Analysis of high temperature polymer electrolyte membrane fuel cell electrodes using electrochemical impedance spectroscopy. Mamlouk M, Scott K. Electrochimica Acta 2011, 56(16), Modelling the Micro-Macro Homogeneous Cycling Behaviour of a Lithium-Air Battery. Ukrit Sahapatsombut; Hua Cheng, Keith Scott. J Power Sources 227 (2013) Performance of MnO 2 Crystallographic Phases in Rechargeable Lithium-Air Oxygen Cathode Oloniyo, Olubukun; Kumar, Senthil; Scott, Keith. J of Electronic Materials Volume: 41 Issue: 5 Pages: Selection of oxygen reduction catalysts for rechargeable lithium-air batteries- Metal or oxide. Cheng, H.; Scott, K. Applied Catalysis Environmental Volume: 108 Issue: 1-2 Pages:

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20 The ELIBAMA project is granted by the European Commission under the Nanosciences, nanotechnologies, materials & new production technologies (NMP) Theme of the 7th Framework Programme for Research and Technological Development.