| AVS 66th International Symposium & Exhibition | |
| Manufacturing Science and Technology Group | Wednesday Sessions |
| Session MS-WeA |
| Session: | Science and Technology for Manufacturing: Solid State Batteries (ALL INVITED SESSION) |
| Presenter: | Corey Love, U.S. Naval Research Laboratory |
| Authors: | R.W. Atkinson III, EXCET, Inc. R. Carter, U.S. Naval Research Laboratory C.T. Love, U.S. Naval Research Laboratory |
| Correspondent: | Click to Email |
Solid state batteries promise a number of advantages over liquid electrolyte alternatives. The solid state battery will significantly improve safety by eliminating flammable electrolytes, enable high energy density by utilizing alkali metal anodes, and eliminate the weight and volume contribution from a host or alloying element at the anode. However, significant challenges remain in stabilizing metal anodes over many cycles and at high rates. Significant efforts in interfacial design and current collector structure have aimed to demonstrate the viability of the solid state battery, but these strategies often involve complex and costly manufacturing. Herein, we demonstrate the advantage of simply externally warming the anode (40 °C) and cooling the cathode (0°C) to stabilize charging or the plating of metal compared to isothermal controls (20 °C). This technique enables the high rate and long cycle-life desired for viability of the solid state configuration. Our results reveal remarkable stability over many hours (32% lower voltage hysteresis after 400 hr) of operation and fast charging with current densities up to 10 mA/cm2 (competitive with 2C in conventional Li-ion). Further, a thermal gradient is easily implemented in the thermal management strategies commonly used in battery modules making the strategy commercially viable. Finally, it is likely that the thermal gradient will not only assist in realization of the metal anode but also the solid electrolyte. Solid electrolytes are challenged by low ionic conductivity which is often enhanced by heating the material up to ~80 °C. The operational benefit observed in the liquid cells and the directionality of ion movement provided suggest that application of an external thermal gradient will provide better performance than isothermal heating alone.
Carter, R.; Love, C. T., Modulation of Lithium Plating in Li-Ion Batteries with External Thermal Gradient. ACS Applied Materials & Interfaces 2018,10 (31), 26328-26334.
Mistry, A.; Fear, C.; Carter, R.; Love, C. T.; Mukherjee, P. P., Electrolyte Confinement Alters Lithium Electrodeposition. ACS Energy Letters 2018, 156-162.