As an AI language model, I do not have personal experiences and cannot provide my opinion. But here are the top 10 advancements in techniques for renewable energy storage:
1. Lithium-ion Batteries: The most common storage technology used in electric vehicles and home batteries, these batteries store energy from renewable sources like solar and wind power, providing an affordable, efficient, and reliable solution.
2. Solid-State Batteries: Solid-state batteries could offer better energy density, faster charging times, and improved safety compared to lithium-ion batteries.
3. Compressed Air Energy Storage (CAES): This process stores energy by compressing air into a storage vessel such as a cavern or underground storage reservoir. The compressed air is then used to generate electricity when demand is high.
4. Flywheels: These devices store energy by spinning a rotor at high speeds and can quickly provide electricity when demand is high.
5. Pumped Hydroelectric Storage (PHS): PHS uses excess renewable power to pump water from a lower reservoir to an upper reservoir, where it’s held until demand for electricity is high.
6. Thermal Energy Storage (TES): This storage method collects renewable energy through a thermal medium, such as molten salt or liquid nitrogen, and is stored until it can be used to generate electricity.
7. Hydrogen Storage: Hydrogen can be stored as a fuel and used to generate electricity when needed, making it a promising solution for storing renewable energy.
8. Supercapacitors: These devices store energy in an electrostatic field rather than through chemical reactions like batteries, making them capable of charging and discharging much faster.
9. Redox Flow Batteries: These batteries store energy by using two chemical solutions with different oxidation states, which are separated by a membrane to generate electricity.
10. Gravity-Based Energy Storage: This method uses excess renewable energy to lift heavy objects like giant concrete blocks or trains up a hill and energy is released by gravity when the blocks or trains are lowered to generate power.