Heat bricks are distant possibility, seems lot of work to be done, need to store higher temperature than currently possible, only useful immediately for industr

Heat bricks are distant possibility, seems lot of work to be done, need to store higher temperature than currently possible, only useful immediately for industrial heat if temperatures met and then possibly electricty generation. http://news.mit.edu/2017/firebricks-low-cost-storage-carbon-free-energy-0906 http://news.mit.edu/2017/firebricks-low-cost-storage-carbon-...