Advanced Low-Temperature Capable Polymer Composite Electrolyte, Semi Solid-State Battery

Solid Energies Inc. (SEI) (www.solidenergies.com) in team with the University of South Dakota proposes to provide reliable, high-performing secondary battery technologies for sustained operation and survivability in low-temperature lunar conditions. The harsh, low-temperature environment of the lunar surface presents unique challenges for providing reliable surface power. Advanced cells with lower temperature capability reduce the need for ancillary thermal management, which would reduce system mass /volume, enable longer mission durations, and enhance our capabilities throughout a sustained human presence. The goal is to create highly versatile, stretchable, and shape changing batteries that benefit both NASA’s Moon to Mars initiative and planetary science missions to the outer solar system. These batteries possess unique qualities, such as the ability to withstand extreme temperatures and fit securely into tight or irregular spaces without compromising safety. It is built upon a high-voltage capable, multifunctional, polymer composite solid-state electrolyte (SSE), which offers high ionic conductivity to facilitates charge transfer and excellent electrochemical/ chemical stability over an extreme range of temperatures (-80℃ to 90℃). This class of SSE enable the use of (1) Li-ion anodes through a resilient interface control, and (2) 5V class high-voltage cathode materials, for instance, Co-free, low-cost LiNi0.5Mn1.5O2 (LNMO) with high operating potential (~4.7 V vs. Li/Li+) that is normally outside the window of liquid electrolytes used in current Li-ion batteries (LiBs). In addition, the proposed ASSB cells will employ the patented designs of electrolyte-infiltrated composite cathode and co-curable multilayer cell structure that (1) enables the formation of a 3-dimension networking electrolyte to minimize the interface resistance and (2) allows the ASSB to be manufactured with a low-cost, roll-to-roll process compatible with the current production of LiBs.