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Scientists Discover Way to Send Information into Black Holes Without Using Energy

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Scientists Capture the Exact Moment Lithium-Ion Batteries Start to Break Down

Lithium-ion batteries power almost every modern device we use—from smartphones and laptops to electric vehicles. They are lightweight, rechargeable, and efficient. But despite their popularity, these batteries have one major weakness: they slowly degrade over time. Charge them too fast or use them in cold temperatures, and they can begin to fail even faster.

Now, engineers at Washington University in St. Louis have made a breakthrough. For the first time, they have clearly observed the exact moment when lithium-ion batteries begin to fail internally. Their discovery could lead to safer, longer-lasting batteries and smarter charging systems in the future.

The research, led by Professor Peng Bai and his team at the McKelvey School of Engineering, was recently published in the scientific journal Small. Their findings may change how batteries are designed, charged, and protected.

Why Lithium-Ion Batteries Fail

To understand the breakthrough, it helps to first understand how lithium-ion batteries work.

Inside every lithium-ion battery are two main components:

  • Cathode (positive electrode)

  • Anode (negative electrode, usually made of graphite)

When you charge the battery, lithium ions move from the cathode to the anode. When you use the battery, they move back. This back-and-forth movement stores and releases energy.

But problems arise when charging happens too quickly—or when temperatures are too cold.

Instead of smoothly entering the graphite structure of the anode, lithium ions sometimes collect on its surface and turn into metallic lithium. This unwanted process is called lithium plating.

Lithium plating is dangerous because:

  • It reduces battery capacity.

  • It shortens battery lifespan.

  • It can create tiny metal spikes called dendrites.

  • In extreme cases, it can cause overheating or even fires.

Until now, scientists couldn’t clearly see exactly when lithium plating began inside working batteries. That limited their ability to prevent it.

A New Way to Watch Batteries in Action

The team at Washington University developed something called an operando microscopy platform.

“Operando” means observing something while it is operating. In simple terms, the researchers created a system that lets them watch a battery working in real time under a microscope.

Instead of guessing what was happening inside, they built a setup using glass tubes that mimicked real battery conditions. This allowed them to:

  • Observe lithium movement live.

  • Identify exactly when lithium plating begins.

  • Measure the voltage and timing of plating formation.

For the first time, scientists could literally see the birth of battery failure.

The Exact Moment Plating Begins

One of the most important outcomes of the research was identifying the precise voltage at which lithium plating starts.

This matters because batteries charge based on voltage limits. If manufacturers know the exact voltage threshold where plating begins, they can program charging systems to stop before that point.

Professor Bai explained that once you know the safe capacity limit, you can design batteries and charging systems to avoid crossing it.

The team used their observations to create what they call a performance map. This map shows:

  • Safe charging speeds

  • Risky voltage levels

  • Temperature effects

  • Plating onset timing

This performance map could become a powerful tool for battery designers worldwide.

Why Fast Charging Is Risky

Fast charging has become a major selling point for phones and electric vehicles. Nobody likes waiting hours for a battery to fill up.

However, faster charging pushes more lithium ions toward the anode in a shorter time. If the graphite cannot absorb them quickly enough, lithium builds up on the surface instead.

Cold temperatures make this worse. In cold conditions:

  • Lithium ions move more slowly.

  • Graphite becomes less receptive.

  • Plating happens earlier.

This explains why charging a phone or electric vehicle in winter can reduce performance or increase long-term damage.

With their new platform, the researchers confirmed exactly how temperature and speed interact to trigger plating.

Better Electrolytes, Better Batteries

The study also explored how different battery electrolytes affect performance.

Electrolytes are the chemical liquids inside batteries that allow lithium ions to move between electrodes.

The team tested ether-based electrolytes and found promising results. These electrolytes showed improved resistance to lithium plating under certain conditions.

That means future batteries might use modified chemistry to reduce risk during fast charging.

In the long run, combining:

  • Better materials,

  • Safer voltage limits,

  • And smarter charging systems

could dramatically improve battery lifespan.

Smarter Charging in the Future

Imagine a phone charger that automatically stops charging at the perfect moment—before lithium plating even begins.

That’s the long-term vision of this research.

With accurate performance maps, manufacturers could build charging systems that:

  • Adjust speed based on temperature.

  • Monitor internal voltage precisely.

  • Automatically cut off before damage occurs.

Electric vehicles could especially benefit. Faster charging is essential for EV adoption, but safety must remain a top priority.

This research offers a scientific foundation for designing safer fast-charging protocols.

What This Means for Consumers Today

While smarter charging technology is still being developed, there are practical steps consumers can take right now.

Professor Bai suggests not always charging devices to 100%, especially when fast charging.

Stopping at around 80% can:

  • Reduce stress on the battery.

  • Lower the chance of lithium plating.

  • Extend overall lifespan.

Also:

  • Avoid fast charging in very cold temperatures.

  • Don’t leave devices charging overnight unnecessarily.

  • Use manufacturer-approved chargers.

These small habits can significantly extend battery health.

A Turning Point for Battery Research

For years, lithium plating was understood in theory, but not clearly observed in real time. Scientists relied on indirect measurements and post-mortem analysis of failed batteries.

Now, thanks to operando microscopy, researchers have a clear window into the exact moment failure begins.

This breakthrough represents more than just a scientific milestone—it provides actionable data that can reshape battery engineering.

With better visualization tools:

  • Engineers can design new battery chemistries.

  • Companies can optimize fast-charging limits.

  • Consumers can enjoy safer, longer-lasting devices.

The Bigger Picture

As the world shifts toward electric mobility and renewable energy, battery reliability becomes even more critical.

Electric vehicles, grid storage systems, drones, and medical devices all depend on lithium-ion technology. Improving safety and lifespan reduces waste, lowers costs, and increases sustainability.

Understanding exactly when and how lithium plating begins gives scientists the power to prevent it.

Sometimes, progress does not come from inventing something new—but from finally being able to see what was hidden.

With this breakthrough, engineers have gained that clarity.

And in the world of batteries, seeing failure clearly may be the key to stopping it before it starts.

Reference: R. K. Gopal, B. Ma, and P. Bai, “ Mapping Out Fast Charging Safe Limits for High-Loading Lithium-Ion Cells by High-Fidelity Operando Microscopy.” Small (2026): e14619. https://doi.org/10.1002/smll.202514619

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