Local State‐of‐Charge Mapping of Lithium‐Ion Battery Electrodes

Current lithium-ion battery technology is gearing towards meeting the robust demand of power and energy requirements for all-electric transportation without compromising on the safety, performance, and cycle life. The state-of-charge (SOC) of a Li-ion cell can be a macroscopic indicator of the state-of-health of the battery. The microscopic origin of the SOC relates to the local lithium content in individual electrode particles and the effective ability of Li-ions to transport or shuttle between the redox couples through the cell geometric boundaries. Herein, micrometer-resolved Raman mapping of a transition-metal-based oxide positive electrode, Li1-x(NiyCozAl1-y-z)O2, maintained at different SOCs, is shown. An attempt has been made to link the underlying changes to the composition and structural integrity at the individual particle level. Furthermore, an SOC distribution at macroscopic length scale of the electrodes is presented.

[1]  Robert Kostecki,et al.  In situ raman microscopy of individual LiNi0.8Co0.15Al0.05O2 particles in a Li-ion battery composite cathode. , 2005, The journal of physical chemistry. B.

[2]  C. Delmas,et al.  On the LixNi0.8Co0.2O2System , 1998 .

[3]  M. Armand,et al.  Building better batteries , 2008, Nature.

[4]  J. Goodenough.  Challenges for Rechargeable Li Batteries , 2010 .

[5]  Robert Dominko,et al.  Is small particle size more important than carbon coating? An example study on LiFePO4 cathodes , 2007 .

[6]  R. Frech,et al.  Vibrational spectroscopic and electrochemical studies of the low and high temperature phases of LiCo1−x MxO2 (M = Ni or Ti) , 1996 .

[7]  D. Guyomard,et al.  Ionic vs Electronic Power Limitations and Analysis of the Fraction of Wired Grains in LiFePO4 Composite Electrodes , 2010 .

[8]  D. Guyomard,et al.  Electronic and Ionic Wirings Versus the Insertion Reaction Contributions to the Polarization in LiFePO4 Composite Electrodes , 2010 .

[9]  Linda F. Nazar,et al.  Positive Electrode Materials for Li-Ion and Li-Batteries† , 2010 .

[10]  Linda F. Nazar,et al.  Review on electrode–electrolyte solution interactions, related to cathode materials for Li-ion batteries , 2007 .

[11]  A. Manthiram,et al.  Low temperature synthesis of insertion oxides for lithium batteries , 1998 .

[12]  C. Julien,et al.  Raman scattering of LiNi1−yAlyO2 , 2002 .

[13]  Robert Kostecki,et al.  Diagnostic Evaluation of Detrimental Phenomena in High-Power Lithium-Ion Batteries , 2005 .

[14]  Robert Kostecki,et al.  Local-probe studies of degradation of composite LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} cathodes in high-power lithium-ion cells , 2004 .

[15]  Guoying Chen,et al.  Continuity and performance in composite electrodes , 2010 .

[16]  M. Whittingham,et al.  Lithium batteries and cathode materials. , 2004, Chemical reviews.

[17]  J. Tarascon,et al.  Comparison of Modeling Predictions with Experimental Data from Plastic Lithium Ion Cells , 1996 .

[18]  Petr Novák,et al.  Raman microscopy as a quality control tool for electrodes of lithium-ion batteries , 2001 .

[19]  John N. Harb,et al.  Modeling of Particle-Particle Interactions in Porous Cathodes for Lithium-Ion Batteries , 2007 .

[20]  M. Gaberšček,et al.  Electrochemical kinetics of porous, carbon-decorated LiFePO4 cathodes: separation of wiring effects from solid state diffusion. , 2007, Physical chemistry chemical physics : PCCP.

[21]  Dennis W. Dees,et al.  Analysis of the Galvanostatic Intermittent Titration Technique (GITT) as applied to a lithium-ion porous electrode , 2009 .