Perhaps with todays prices on large lithium storage which I documented elsewhere in this thread at ~$500/kWh installed for a real project in the United States. Most analysts expect that price halves to $250/kWh or lower in the next decade which radically changes the economics.

There are thousands of companies working on battery advancements within the entire stack right now.

Raw material mining, refinement of materials, recycling, cell chemistry, longevity, density improvements, pack improvements, battery managament systems, thermal systems, safety, packaging, kW scale home batteries, GW scale utility batteries, cars, trucks, buses, planes, trains, automobiles, ships. The amount of capital deployed is in the trillions of dollars.