Free tools Windows power users keep installed
One-click scans. No signup required.
Yes: a difference in salinity can generate electricity. In a 2016 laboratory experiment, researchers used a single nanopore in an atomically thin molybdenum disulfide (MoS₂) membrane to turn a salt gradient into ionic current—and used the generator to power a transistor. The result was a nanoscale demonstration, not a commercial power source.
What “blue energy” means
Blue energy is energy harvested from the chemical-potential difference between solutions with different salt concentrations—for example, seawater and freshwater. When the solutions are separated by a suitable membrane, ions move in response to the gradient. If that movement is selective, it can produce an electrical current.
As an Amazon Associate I earn from qualifying purchases.
The 2016 study by Feng and colleagues, published in Nature, explored this principle using a single-layer MoS₂ membrane with a nanopore. The paper is titled “Single-layer MoS₂ nanopores as nanopower generators”.
How the MoS₂ nanopore made current
A salt gradient across a tiny pore
The researchers placed a 0.65-nanometre-thick MoS₂ sheet between potassium chloride solutions of different concentrations. The concentration difference creates a chemical-potential difference across the pore, encouraging ions to move from one side to the other.
#1 Best Overall
- HANDS-ON WATER FILTRATION: Kids can build their own water filtration and distillation plant, providing a practical understanding of how clean water is produced and the science behind water purification.
- SOLAR POWER DISINFECTION: The kit teaches children how to disinfect water using solar power, promoting renewable energy concepts and demonstrating sustainable practices in water resource management.
- COMPREHENSIVE EXPERIMENTATION: Includes a detailed booklet with suggested experiments and activities, allowing for a variety of hands-on learning experiences that reinforce the principles of clean water science.
- ENVIRONMENTAL AWARENESS: Features alarming water facts that educate children about environmental issues and the importance of protecting clean water resources, fostering a sense of responsibility toward the planet.
- PERFECT FOR ALL SETTINGS: The kit includes clear instructions and all necessary materials, making it simple for children to conduct experiments safely and effectively. STEM powered learning.
Selective ion transport produces electricity
The pore’s negative charge favored the passage of positively charged potassium ions over negatively charged chloride ions. That imbalance in ion movement generated a diffusion current. The underlying approach is in the reverse-electrodialysis and electrokinetic family: it converts selective ion transport into electrical output.
What the experiment demonstrated—and what its power figure means
Feng and colleagues reported an estimated power density of up to 10⁶ watts per square metre for the single-nanopore laboratory experiment. The authors attributed the current mainly to the atomically thin MoS₂ membrane. This is an experimental estimate associated with the research setup, not the measured output of a large membrane installation or power plant.
Rank #2
- This personal desalination kit demonstrates the scientific way to extract salt from sea water.
- The kit contains a plastic filter system, active carbon, sand, rock and filter paper.
- Perfect for young science enthusiasts, especially those with an interest in chemistry and the environment.
- Detailed instructions for use and care are included.
- Recommended for ages 8 years and up.
The team also connected two sheets or generators to power a MoS₂ transistor, demonstrating a self-powered nanosystem under laboratory conditions. The paper describes using the nanopore generator to power the transistor; the result showed that the output could operate a small electronic device, not that it could supply ordinary household or grid demand.
How this approach differs from other osmotic-power methods
Osmotic power systems also include pressure-retarded osmosis (PRO) and reverse electrodialysis (RED). They draw on the same broad resource—differences in salinity—but convert it in different ways.
Rank #3
- This power generation experiment device serves as excellent tool for teaching and engaging student minds in scientific exploration.
- Discover the wonders of science with the Saltwater Power Generation Experiment Case, designed to stimulate curiosity and deepen understanding of electricity principles through hands on learning.
- Crafted from pp, clear color, easy to follow instructions that allow children to understand scientific concepts while having fun.
- Suitable for children aged 6 ＋, as well as students and enthusiasts interested in physics and electrical experiments.
- Enhancing your classroom or home learning environment with this interactive saltwater battery experiment set, unique way to introduce alternative energy sources and foster critical thinking skills.
| Approach | How it converts the salinity difference | Scale and caveats established in the cited reporting |
|---|---|---|
| Pressure-retarded osmosis (PRO) | Uses a membrane to create a pressure difference, which can drive a turbine. | The cited sources provide no comparable commercial-product or deployment figures. |
| Conventional reverse electrodialysis (RED) | Uses ion-exchange membranes to move ions selectively and generate electrical output. | The cited sources provide no comparable commercial-product or deployment figures. |
| MoS₂ nanopore generator | Uses selective ion transport through a charged nanopore in an atomically thin membrane to create current. | Demonstrated with a single nanopore in a laboratory; large-area fabrication and fouling were identified as practical challenges. |
Why it was not ready for large-scale power
Making large, uniform membranes
A striking result from one nanopore does not establish that the same performance can be reproduced across a large, durable membrane. In Chemistry World’s 2016 report, researcher Lydéric Bocquet cautioned that producing MoS₂ sheets at metre-square scale could be a limiting step. The report’s discussion concerns scale-up challenges, not a demonstrated route to a power plant.
Keeping nanopores clear in natural water
River water and seawater contain material that can foul or clog very small pores. Ngai Yin Yip, quoted in the same Chemistry World report, identified fouling as a concern, along with the practical challenge of drawing from separate water reservoirs without consuming too much energy. A laboratory salt-solution experiment does not by itself resolve those operating issues.
Rank #4
- ⚡ 8 Set 3-in-1 Science Discovery: Explore the wonders of green energy by creating power from three different sources: Saltwater Power, Cola Power, and Fruit Batteries!
- 🧪 Complete STEM Learning Kit: Includes everything needed for a successful experiment: Zinc (Zn) and Copper (Cu) plates, connector wires with clips, LED lights, measuring cups, and a detailed instruction guide.
- 🎓 Hands-On Education: Perfect for kids aged 8+, this kit teaches real-world physics and chemistry concepts through engaging, tactile play that builds confidence and critical thinking.
- 📦 Bulk Value for Groups: Our set comes with 8 individual experiment packs and extra cups, making it an ideal choice for science classrooms, homeschooling groups, or birthday party activities.
- ✅ Safe & Easy to Use: No complex tools or dangerous chemicals required! The step-by-step visual guide ensures a frustration-free experience for parents and children alike.
Finding a realistic first use
The 2016 report pointed to remote, low-power nanosensors as a possible niche for the technology. That was a potential application, not evidence of a deployed product. The EPFL Laboratory of Nanoscale Biology’s nanopore research page describes ongoing work involving MoS₂, hBN and osmotic power generation; it indicates continuing research interest, not commercial availability.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →What the result tells readers
The study established that an atomically thin MoS₂ nanopore could harvest current from a salinity gradient and power a transistor in a laboratory demonstration. Its estimated peak power density is notable at the scale studied, but it cannot be read as a prediction of plant output. Turning the result into a practical energy system would depend on scaling membrane fabrication, maintaining pore performance in natural water and managing the energy overhead of the overall setup.
Quick Recap
Best Value
- Core Learning Value: This salt water battery kit turns a simple experiment into a clear hands-on lesson, helping students see how electricity can be generated with saltwater and basic metal parts. It is a practical science experiment kit for classroom demonstrations, home study, and STEM exploration
- Complete Parts Set: Includes 2 liquid battery boxes, 2 iron plates, and 2 copper plates, so you have the key pieces ready for a battery science experiment kit. the simple setup supports repeat practice and makes it easier to start a liquid battery experiment without extra searching
- Easy to Use Anywhere: the compact 2.6 x 2.0 x 1.0 in size makes this science project kit easy to carry, store, and bring out for quick experiments. It fits well on a desk, classroom table, or home learning space when you want a low-fuss science activity
- Reusable Practice Tool: Built with transparent plastic, iron, and copper, this battery box lets learners observe the setup more clearly during each trial. the reusable design supports multiple science experiments, giving teachers and parents a dependable way to revisit the
- What You Get: a 2-piece set of saltwater battery boxes with matching metal plates, ready for a DIY salt water battery project or a battery making kit. a thoughtful pick for classroom activity bins, family , or a gift-ready science kit battery for curious learners
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
