This good blog has many links to other articles about competitors to Li-Ion AKA LIBs. But near the end it explains why LIBs may be very difficult to compete against.
It points out that as more renewables make up the grid, there is more demand for medium (8 to 24 hours) storage and long term storage, even seasonal. The success of the storage is necessary because it must replace the fossil fuel “base load” plants. It’s very difficult to replace a nuclear power plant that puts out full power for more than a year. But it must be done to eliminate fossil fuels.