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Liquified gas electrolyte

Liquified gas electrolyte is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Liquified gas electrolyte rather than just read about it. In short: A liquified gas electrolyte (LGE) is a battery/capacitor electrolyte made by compressing an ambient pressure gas into liquid form. Candidate gases are those composed of reasonably polar molecules that can be liquified at pressures low enough to be accommodate in a standard battery can.

Key takeaways

  • Liquified gas electrolyte belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Liquified gas electrolyte to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Liquified gas electrolyte from memory before moving on to harder problems.

Reference excerpt

A liquified gas electrolyte (LGE) is a battery/capacitor electrolyte made by compressing an ambient pressure gas into liquid form. Candidate gases are those composed of reasonably polar molecules that can be liquified at pressures low enough to be accommodate in a standard battery can.

Research One study reported on a liquified hydrofluorocarbon (HFC) electrolyte. HFCs features relatively strong chemical bonds and a large electrochemical window that protect them from oxidation/reduction across charge/discharge cycles. It combined a moderate relative permittivity with low viscosity to produce a dielectric-fluidity factor and conductivity higher than existing solvents. Because of its low melting point, it has the potential for improved operation at low temperatures. Difluoromethane (CH2F2) was able to operate at a range of temperatures from –78° to +65 °C at 3.0 volts. Fluoromethane (CH3F) showed dendrite-free ~97% platting and stripping efficiency on lithium metal over hundreds of cycles It further achieved good cycling and rate performance on a LiCoO2cathode with discharge capacity retention of 60.6% at –60 °C. It reported that conductivity reversibly ended at high temperature as the salt precipitated near the supercritical point (~40° to 80 °C), reducing the potential for thermal runaway. However, the material's high saturated vapor pressure was a fire risk. A later study by the same lab reviewed nonflammable 1,1,1,2-tetrafluoroethane and pentafluoroethane and reported >3 mS cm−1 ionic conductivity from −78 to +80 °C. Lithium cycling maintained >99% coulombic efficiency for over 200 cycles at 3 mA cm−2 and 3 mAh cm−2. Li/NMC622 full batteries demonstrated stable cycling from −60 to +55 °C.

See also Lithium ion battery

References

External links Yang, Yangyuchen; Yin, Yijie; Davies, Daniel M.; Zhang, Minghao; Mayer, Matthew; Zhang, Yihui; Sablina, Ekaterina S.; Wang, Shen; Lee, Jungwoo Z.; Borodin, Oleg; Rustomji, Cyrus S.; Meng, Y. Shirley (2020-07-15). "Liquefied gas electrolytes for wide-temperature lithium metal batteries". Energy & Environmental Science. 13 (7): 2209–2219. doi:10.1039/D0EE01446J. ISSN 1754-5706. Davies, Daniel M.; Yang, Yangyuchen; Sablina, Ekaterina S.; Yin, Yijie; Mayer, Matthew; Zhang, Yihui; Olguin, Marco; Lee, Jungwoo Z.; Lu, Bingyu; Damien, Dijo; Borodin, Oleg; Rustomji, Cyrus S.; Meng, Y. Shirley (2021-05-01). "A Safer, Wide-Temperature Liquefied Gas Electrolyte Based on Difluoromethane". Journal of Power Sources. 493 229668. Bibcode:2021JPS...49329668D. doi:10.1016/j.jpowsour.2021.229668. ISSN 0378-7753. S2CID 233547781. Rustomji, Cyrus. "ARPA E presentation" (PDF).

Worked examples

Example 1 — a first encounter with Liquified gas electrolyte

Start with the simplest possible case. Write down what Liquified gas electrolyte claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Liquified gas electrolyte before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Liquified gas electrolyte ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Liquified gas electrolyte

In research
Liquified gas electrolyte appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Liquified gas electrolyte in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Liquified gas electrolyte is common in secondary-school and first-year university syllabi. It links to neighbouring topics Electrolytes, Gas technologies, so understanding it makes those chapters shorter.
In everyday life
Look for Liquified gas electrolyte outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Liquified gas electrolyte in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Liquified gas electrolyte means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Liquified gas electrolyte out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Liquified gas electrolyte in simple terms?

A liquified gas electrolyte (LGE) is a battery/capacitor electrolyte made by compressing an ambient pressure gas into liquid form. Candidate gases are those composed of reasonably polar molecules that can be liquified at pressures low enough to be accommodate in a standard battery can.

Why does Liquified gas electrolyte matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Liquified gas electrolyte?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Liquified gas electrolyte.

Tags

  • Electrolytes
  • Gas technologies

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