TY - JOUR
T1 - Enhanced autonomic shutdown of Li-ion batteries by polydopamine coated polyethylene microspheres
AU - Baginska, Marta
AU - Blaiszik, Benjamin J.
AU - Rajh, Tijana
AU - Sottos, Nancy R.
AU - White, Scott R.
N1 - Funding Information:
This research was supported as part of the Center for Electrical Energy Storage, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences. M. Baginska would also like to acknowledge the National Science Foundation for its Graduate Research Fellowship Program (GRFP) Fellowship. B. Blaiszik was supported via the Argonne National Laboratory Director's Postdoctoral Fellowship. The authors would like to thank Dr. Chris Johnson at Argonne National Laboratory for allowing the use of the CH instruments potentiostat in his lab and Dr. David Schilter (UIUC) for assistance with FTIR experiments.
PY - 2014/12/10
Y1 - 2014/12/10
N2 - Thermally triggered autonomic shutdown of a Lithium-ion (Li-ion) battery is demonstrated using polydopamine (PDA)-coated polyethylene microspheres applied onto a battery anode. The microspheres are dispersed in a buffered 10 mM dopamine salt solution and the pH is raised to initiate the polymerization and coat the microspheres. Coated microspheres are then mixed with an aqueous binder, applied onto a battery anode surface, dried, and incorporated into Li-ion coin cells. FTIR and Raman spectroscopy are used to verify the presence of the polydopamine on the surface of the microspheres. Scanning electron microscopy is used to examine microsphere surface morphology and resulting anode coating quality. Charge and discharge capacity, as well as impedance, are measured for Li-ion coin cells as a function of microsphere content. Autonomous shutdown is achieved by applying 1.7 mg cm-2 of PDA-coated microspheres to the electrode. The PDA coating significantly reduces the mass of microspheres for effective shutdown compared to our prior work with uncoated microspheres.
AB - Thermally triggered autonomic shutdown of a Lithium-ion (Li-ion) battery is demonstrated using polydopamine (PDA)-coated polyethylene microspheres applied onto a battery anode. The microspheres are dispersed in a buffered 10 mM dopamine salt solution and the pH is raised to initiate the polymerization and coat the microspheres. Coated microspheres are then mixed with an aqueous binder, applied onto a battery anode surface, dried, and incorporated into Li-ion coin cells. FTIR and Raman spectroscopy are used to verify the presence of the polydopamine on the surface of the microspheres. Scanning electron microscopy is used to examine microsphere surface morphology and resulting anode coating quality. Charge and discharge capacity, as well as impedance, are measured for Li-ion coin cells as a function of microsphere content. Autonomous shutdown is achieved by applying 1.7 mg cm-2 of PDA-coated microspheres to the electrode. The PDA coating significantly reduces the mass of microspheres for effective shutdown compared to our prior work with uncoated microspheres.
KW - Li-ion batteries
KW - Polydopamine coating
KW - Polyethylene microspheres
KW - Thermal shutdown
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U2 - 10.1016/j.jpowsour.2014.07.048
DO - 10.1016/j.jpowsour.2014.07.048
M3 - Article
AN - SCOPUS:84905159299
SN - 0378-7753
VL - 269
SP - 735
EP - 739
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -