Solid State Li-ion Batteries
Final rept. 20 Aug 2012-16 Nov 2013
COLORADO UNIV AT BOULDER
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Over the last one year, we have worked on an all-solid-state Li-ion battery and demonstrated a specific energy of 225 mWh g-1 based upon the combined mass of both the composite anode and cathode. To realize this full cell, we pair an iron sulfide and sulfur composite cathode with a Si-based anode. The anode active material is a Si-Ti-Ni alloy with good ionic and electronic conductivity that attains a stable specific capacity of 400 mAh g-1 based upon the total mass of the composite anode. To our knowledge, this is the highest stable Si-based allsolid- state anode specific capacity reported to date. To utilize both a lithium free anode and cathode, we adopt a pre-lithiation technique involving stabilized lithium metal powder. This is the first time that this technique has been demonstrated in an all-solid-state battery.
- Physical Chemistry
- Electrochemical Energy Storage
- Atomic and Molecular Physics and Spectroscopy