Triton 47 › Space, time & physics › After the PhD
Energy extraction in universe
Index note energy density tables; battery exponential-growth timeline (GPT)
Energy, the fundamental form of existence in this universe. It forms matter (matter is trapped energy), and it can flow freely, representative through motion of matter, i.e. moving trapped energy. Another fundamental property of this universe concerns Newtons laws, Inertia, that this trapped moving energy interacts with other energies (flowing or trapped) through (called as) forces. Forces can affect diversely, from different matter forms (and also charges,..) ranging from strong nuclear forces, to electromagnetic forces (which mostly exist over long ranges through coupling of electric field and magnetic field i.e. EM waves), to long range gravitational forces. These forces pile up in nucleus, atoms, molecules, materials, mines, stars.
However, from all these, the need for a future existence on earth, is the need to harness energy. For its creation of new experience, a different world, to conscious beings.
Current (from chatgpt:)
Modern Energy Sources & Their Energy Densities
| Energy Source | Energy Density (MJ/kg or MJ/L) | Notes |
|---|---|---|
| Fossil Fuels | ||
| – Coal | ~24 MJ/kg | Used for electricity and industry |
| – Crude Oil | ~42-47 MJ/kg | Transport and heating fuel |
| – Diesel | ~45.5 MJ/kg (~38.6 MJ/L) | High-efficiency transport fuel |
| – Gasoline | ~46.4 MJ/kg (~34.2 MJ/L) | Common in automobiles |
| – Natural Gas (Methane) | ~55 MJ/kg (~38 MJ/m³) | Power plants, heating, industry |
| Nuclear Energy | ||
| – Uranium-235 (Fission) | ~80,000,000 MJ/kg | Used in nuclear reactors |
| – Plutonium-239 (Fission) | ~83,000,000 MJ/kg | Nuclear power & weapons |
| – Deuterium-Tritium Fusion | ~330,000,000 MJ/kg | Not yet commercialized |
| Renewable Energy | ||
| – Hydropower | N/A | Depends on water volume & flow |
| – Wind Energy | N/A | Power density ~1.5 MW/km² |
| – Solar PV | N/A | Power density ~150 W/m² |
| – Biomass | ~10-20 MJ/kg | Variable efficiency |
| – Geothermal | N/A | Location-dependent, ~0.1-1 MW/km² |
| Chemical & Alternative Fuels | ||
| – Hydrogen (Gas) | ~120 MJ/kg (~8.5 MJ/L at 700 bar) | High density per kg, low per L |
| – Hydrogen (Liquid) | ~141 MJ/kg (~10 MJ/L) | Used in fuel cells, rockets |
| – Ammonia | ~22.5 MJ/kg (~12.7 MJ/L) | Alternative fuel, easier storage than H₂ |
| – Metal Fuels (Al, Mg, Fe) | 30-50 MJ/kg | High-density potential for space & energy |
| – Supercapacitors & Batteries | ||
| – Lithium-ion Batteries | ~0.9 MJ/kg (~2.5 MJ/L) | Used in EVs & electronics |
| – Solid-State Batteries | ~1-2 MJ/kg | Emerging EV/storage tech |
| – Flow Batteries | ~0.2 MJ/kg | Grid energy storage |
Futuristic Energy Sources (Potential & Theoretical)
| Energy Source | Estimated Energy Density | Feasibility |
|---|---|---|
| Advanced Nuclear | ||
| – Thorium Reactors | ~80,000,000 MJ/kg | In development |
| – Molten Salt Reactors | Similar to uranium (~80,000,000 MJ/kg) | Safer, better waste handling |
| Nuclear Fusion | ||
| – Helium-3 Fusion | ~350,000,000 MJ/kg | Requires lunar mining |
| – Deuterium-Deuterium Fusion | ~350,000,000 MJ/kg | Less neutron damage than D-T |
| – Aneutronic Fusion (p-B11) | ~100,000,000 MJ/kg | Radiation-free, clean energy |
| Exotic & High-Energy Sources | ||
| – Antimatter | ~90,000,000,000 MJ/kg | Currently unfeasible |
| – Dark Matter Energy Extraction | Unknown | Theoretical only |
| – Zero-Point Energy | Theoretically Infinite | Quantum vacuum fluctuations |
| Space-Based Energy | ||
| – Space-Based Solar Power | ~1.4 kW/m² (in orbit) | Concept under development |
| – Dyson Swarm (Star Energy) | Near-limitless | Theoretical megastructure |
| Biological & Nano Energy | ||
| – Artificial Photosynthesis | TBD | Converts sunlight directly to fuel |
| – Nanogenerators (Piezoelectric) | TBD | Converts mechanical vibrations |
| – Quantum Dot Solar Cells | Higher than traditional PV | More efficient than silicon |
These futuristic sources are in various stages of research—some nearing feasibility (fusion, advanced nuclear), while others remain highly theoretical (antimatter, zero-point energy).
Biological Energy: Food fuels organisms via cellular respiration in mitochondria, converting glucose into ATP for life processes.
Fossil Fuels: Coal, oil, and gas store ancient solar energy, offering high power but causing pollution and resource depletion.
Renewables: Wind, solar, hydro, and geothermal provide clean, sustainable energy, but require storage solutions for reliability.
Compact Storage: Batteries (lithium-ion, solid-state), hydrogen fuel cells, and flow batteries enable mobile and grid energy storage.
Micro-Energy: Piezoelectric, thermoelectric, and triboelectric technologies harvest small-scale energy for self-powered devices.
Nuclear Power: Fission (uranium, thorium) and fusion (hydrogen, helium-3) provide immense energy with varying safety and waste concerns.
Miniaturized Energy: Micro-nuclear batteries, artificial photosynthesis, and hybrid cells could power autonomous robots and wearables.
Future Innovations: Quantum energy harvesting and zero-point energy (theoretical) could unlock limitless power from space itself.
Ultimate Goal: Developing long-lasting, clean energy sources that enable sustainable technology without harming nature.
Currently fusion power is the cleanest source of energy, along with renewable energy, which is next to fusion power from the sun, affecting earth’s climate, affecting wind, water, and solar itself, but also geothermal from planetary core Earth.
But there could be other forms of energy containers (batteries) that could be engineered to have dense energy forms, steadily increasing in capacity (when would the era of exponential battery growth will come?)
The Future of Energy Storage: When Will Exponential Battery Growth Begin?
The evolution of energy storage is moving toward higher-density, longer-lasting, and safer batteries. While progress has been steady, exponential growth in battery capacity—similar to Moore’s Law for semiconductors—has not yet fully materialized. However, a rapid shift may be coming due to advancements in material science, quantum engineering, and manufacturing breakthroughs.
1. The Current Growth Trajectory (Linear Progress)
- Traditional lithium-ion batteries have improved 3-5% per year in energy density.
- Solid-state batteries (emerging) could double energy capacity but are still in early development.
- Flow batteries & sodium-ion batteries focus on cost efficiency rather than density.
So far, battery development has been incremental, with gradual efficiency gains rather than exponential leaps.
2. What Would Spark an Exponential Growth Era?
Battery technology needs a disruptive breakthrough to trigger exponential growth. The key enabling factors include:
- Quantum Batteries – Utilizing quantum mechanics to store energy in stable states, allowing for near-instant charging.
- Lithium-Air and Metal-Air Batteries – Can theoretically surpass gasoline in energy density.
- Nuclear Diamond Batteries – Self-powered micro-batteries lasting decades, ideal for space and micro-robots.
- Supercapacitor-Battery Hybrids – Providing high energy density with fast charging cycles.
- Self-Assembling Nanostructures – Increasing surface area to store more charge in less space.
These advancements could shift battery development from linear to exponential growth.
3. When Will Exponential Growth Begin?
- By 2030-2035 → Solid-state batteries and lithium-air could double or triple capacities.
- By 2040 → Advanced nano-batteries and quantum storage may enable a 10x leap.
- By 2050 → Self-charging, near-infinite cycle batteries could make charging obsolete.
If breakthroughs in quantum energy storage, advanced materials, or fusion-powered microcells occur, we may see a battery revolution sooner than expected.
4. The Impact of Exponential Battery Growth
- Robotics & AI – Autonomous robots will operate for years without recharging.
- Space Exploration – Nuclear-based micro-batteries will power deep-space probes indefinitely.
- Sustainable Cities – Grid-scale energy storage will eliminate the need for constant energy production.
- Portable Devices – Phones and laptops could last weeks or months per charge.
The moment battery technology moves beyond chemistry into quantum and nuclear scales, we will enter the exponential energy storage era—a future where energy is no longer a constraint but an abundant, limitless resource.
Original: https://triton7777.wordpress.com/2025/03/12/energy-extraction-in-universe/