Keywords: stationary energy storage, battery
Summary:Stationary energy storage is critical for integration of renewable electricity such as solar and wind into electric grid, and also enable opportunities for building energy storage, backup power, and resilient and smart grid. The cost, life, rate and safety of batteries need to be significantly improved for this purpose. Recently in my lab we developed an exciting breakthrough battery chemistry for stationary storage: metal hydrogen gas batteries, in which hydrogen gas electrodes is anodes and Mn or Ni oxides are cathodes. We demonstrated cycle life over 10,000 cycles. Based on previous research of this chemistry in aerospace, we believe that the calendar of this battery chemistry can last for 30 years with >30,000 cycles. We have developed materials and processing to enable low capital cost per kWh. This battery chemistry can enable very low levelized electricity storage cost of $0.01/kWh per cycle, wide operation temperature window, extremely fast charge/discharge, and excellent safety. This technology is ready for commercialization for stationary storage in a wide range of applications. References: 1) W. Chen, G. Li, A. Pei, Y. Li, L. Liao, H. Wang, J. Wan, Z. Liang, G. Chen, H. Zhang, J. Wang, and Y. Cui, "A manganese–hydrogen battery with potential for grid-scale energy storage" Nature Energy (2018) DOI: 10.1038/s41560-018-0147-7. 2) W. Chen, Y. Jin, J. Zhao, N. Liu, and Y. Cui, "Nickel-hydrogen batteries for large-scale energy storage" Proceedings of the National Academy of Sciences (2018) DOI: 10.1073/pnas.1809344115.