Abstract
In 2008, I was sitting with graduate student Aaron Smith one evening and we wondered how a University could make a contribution to the development of Li-ion batteries with decades of lifetime. This conversation led to the development of Ultra High Precision Coulometry, Battery Isothermal Microcalorimetry (with 3M collaborators), in-situ volume measurements of gas generation and electrode stack growth, among other tools. Results from these tools point the way to chemistries that can deliver long lifetime and I will give examples which show the value of these tools. However, in the end, there is really no way to be absolutely certain about long lifetime other than by testing for years and years, even at elevated temperature. I will show results that suggest lifetimes of over 50 years can be obtained for Li-ion cells are simple to make.
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