Really. This would also solve one of the biggest problems of battery-based grid scale storage. Li-ion batteries are one of the best solutions to storing renewable energy for use in off-peak periods in almost all metrics <i>except longevity.</i> The cost&#x2F;benefit for grid-scale storage is over a time period of <i>decades</i> and hundreds of thousands of cycles, usually far longer than li-ion is expected to perform.