There will have to be non-battery alternatives as the amount of metals required to create both the stationary and mobile battery build-out is simply not available with current (!) technology.
And in the case of intermittent power sources, solar and wind, you have to either build storage or construct a grid with so much redundancy the sun never sets on it.
From Asia Times, October 4:
China blowing hot on compressed air energy storageNearly a quarter of China’s excess power will be stored as compressed air by 2030 but regulatory and technical hurdles remain
For decades, global scientists have searched for low-cost methods to store excess electricity generated during non-peak hours for use during peak times. Yet both of the two most commonly used methods have serious limitations.
Batteries offer the highest energy efficiency – more than 90% – but they are expensive. Hydroelectric storage – storing kinetic energy by pumping water to a higher place – has an efficiency of 70-80% but the facility must be built next to a dam.
Now, China is expected to accelerate the development of its far less prevalent compressed air energy storage (CAES) projects to optimize its power grid performance and move in a greener direction.
The country’s first 100-MW CAES national demonstration project, which is touted as the largest and most efficient in the world, was connected to the national power grid in Zhangjiakou in Henan province on September 30.
Separately, the construction of the world’s largest salt cavern CAES facility, located in Tai’an in Shandong province, started on September 28 and is scheduled to commence operations in 2024....
....MUCH MORE
