The Properties of Water
Water is a unique substance with several distinct properties that make it an essential component of our daily lives. Its chemical stability is one of its most notable characteristics, but it also has some significant drawbacks.
Conductivity and Ionization
Water is an excellent conductor of ions, which means it can carry electrical charges. This property is crucial in various applications, such as:
Chemical Stability
Water’s chemical stability is its most significant drawback. It can only withstand a voltage of 1.23 volts before it breaks down. This means that water is not suitable for use in high-voltage applications, such as:
Applications and Limitations
Water’s unique properties make it an essential component in various industries, including:
However, its limitations also mean that it is not suitable for use in certain applications, such as:
Conclusion
In conclusion, water’s properties make it an essential component of our daily lives.
This is a significant challenge in the development of solid-state electrolytes for fuel cells and other energy storage devices.
The Challenge of Solid-State Electrolytes
A Key Component in Energy Storage
Solid-state electrolytes are a crucial component in the development of fuel cells and other energy storage devices. They are responsible for facilitating the flow of ions between the electrodes, allowing the device to generate electricity. However, the development of solid-state electrolytes has been hindered by the need for a liquid electrolyte that is highly concentrated and free of excess water. The electrolyte must be liquid to allow for the free movement of ions
The Problem of Concentration
The challenge of concentration is a significant hurdle in the development of solid-state electrolytes. The electrolyte must be highly concentrated to prevent water from diluting the ions, but this concentration can also lead to the formation of crystals that can block the flow of ions. Researchers have been struggling to find a balance between concentration and crystal formation.
A Breakthrough in Concentration
Empa Researchers Discover a Solution
Researchers in Empa’s Materials for Energy Conversion department have discovered a way to solve the problem of concentration. They have developed a salt containing electrolyte that is liquid at room temperature, but is highly concentrated and free of excess water.
One gram of water dissolves seven grams of sodium FSI. This produces a clear saline solution with an electrochemical stability of up to 2.6 volts – twice as much as other aqueous electrolytes. The researchers discovered that this saline solution displays an electrochemical stability of up to 2.6 volts –nearly twice as much as other aqueous electrolytes. The discovery could be the key to inexpensive, safe battery cells; inexpensive because, apart from anything else, the sodium FSI cells can be constructed more safely and thus more easily than the well-known lithium ion batteries. The system has already withstood a series of charging and discharging cycles in the lab. Until now, however, the researchers have been testing the anodes and cathodes of their test battery separately – against a standard electrode as a partner. In the next step, the two half cells are to be combined into a single battery. Then additional charging and discharging cycles are scheduled.
The SCCER HaE Initiative
The Swiss Competence Center for Heat and Electricity Storage (SCCER HaE) is a national initiative that brings together leading research institutions to tackle the challenge of developing novel battery technologies for stationary energy storage systems. At the heart of this initiative is the renowned Paul Scherrer Institute (PSI), which leads the cutting-edge research on heat and electricity storage concepts.
Key Objectives
Research Focus Areas
Potential Breakthroughs
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