🌍 The Future of Energy Storage – Overview, Evaluation & Decision-Making Tools
1. How much Energy-Storage do we actually need, when we need it, which opportunities does nature grant, in the existing and possibly continually developing world?
If there were future technologies, like a globally stretching energy-net with trust in other decision-makers, efficient and purpose-fitting organisation, people executing their personally fulfilling lives and not giving in to permanent short-term thinking... etc... how well could we all be off/doing?
And how much if that's not (yet) the case? For example from the point we are currently at.
- Intermittent nature of renewables (e.g. solar and wind)
- Ensuring supply security: electricity, heating, mobility, industry
- Matching energy demand and supply
- Key to climate neutrality and grid stability
2. What Types of Energy Storage Technologies Exist?
A) Electrical Storage
- Lithium-ion batteries
- Sodium-ion batteries
- Redox flow batteries
- Supercapacitors
B) Thermal Storage
- Sensible heat storage (e.g. water tanks)
- Latent heat storage (e.g. phase change materials)
- Thermochemical storage
C) Mechanical Storage
- Pumped hydro storage
- Compressed air energy storage (CAES)
- Flywheels
D) Chemical Storage
- Hydrogen (via electrolysis, reconversion)
- Methanation / Power-to-Gas
- Ammonia as energy carrier
- Synthetic fuels
3. Key Evaluation Criteria for Storage Technologies
- Storage duration (short-, medium-, long-term)
- Round-trip efficiency
- Scalability / location dependency
- Cost per kWh / investment cost
- Material demand & environmental impact
- Grid integration potential
- Suitability for different energy sectors (electricity, heat, industry, transport)
4. Where Does Each Technology Make the Most Sense?
- Residential homes
- Urban districts & cities
- Industrial applications
- Grid-level storage & backup
- District heating
- Hydrogen economy
5. Future Questions & Open Topics
- Which technologies should we prioritize?
- Where is more research needed?
- How can we align technological development with societal benefit?
- What is the role of regulation and market design?