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Tiny Diamonds Can Prevent Short-Circuits and Fires in Mobile Phone Batteries: Study

Mixing nanodiamonds into the electrolyte solution of a lithium ion battery slows dendrite formation to nil through 100 charge-discharge cycles

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Tiny diamonds prevent fires in phone batteries
Tiny diamonds prevent fires in phone batteries. Pixabay
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  • The researchers described a process by which tiny diamonds curtail the electrochemical deposition called plating
  • We anticipate the first use of our proposed technology will be in less critical applications
  • Battery buildups called dendrites  are one of the main causes of lithium battery malfunction

USA, August 28, 2017: Researchers have found that tiny diamonds (diamond particles 10,000 times smaller than the diameter of a hair) can prevent short-circuits and fires in lithium batteries widely used in various mobile devices from smartphones to laptops.

The new process that uses tiny diamonds can turn electrolyte solution – a key component of most batteries into a safeguard against the chemical process that leads to battery-related disasters.

In the study, published in the journal Nature Communications, the researchers described a process by which tiny diamonds curtail the electrochemical deposition, called plating, that can lead to hazardous short-circuiting of lithium ion batteries.

“We anticipate the first use of our proposed technology will be in less critical applications, not in cell phones or car batteries,” said Yury Gogotsi, Professor at Drexel University Philadelphia Pennsylvania, US.

“To ensure safety, additives to electrolytes, such as nano diamonds, need to be combined with other precautions, such as using non-flammable electrolytes, safer electrode materials and stronger separators,” Gogotsi added.

Also Read: Lithium Batteries can be charged faster in the near Future: Scientists

As batteries are used and charged, the electrochemical reaction results in the movement of ions between the two electrodes of a battery, which is the essence of an electrical current.

Over time, this re-positioning of ions can create tendril-like buildups almost like stalactites forming inside a cave.

These battery buildups, called dendrites, are one of the main causes of lithium battery malfunction.

As dendrites form inside the battery over time, they can reach the point where they push through the separator, a porous polymer film that prevents the positively charged part of a battery from touching the negatively charged part.

When the separator is breached, a short-circuit can occur, which can also lead to a fire since the electrolyte solution in most lithium-ion batteries is highly flammable.

To avoid dendrite formation and minimize the probability of fire, current battery designs include one electrode made of graphite filled with lithium instead of pure lithium.

The use of graphite as the host for lithium prevents the formation of dendrites. But lithium intercalated graphite also stores about 10 times less energy than pure lithium.

The new study showed that mixing nano diamonds into the electrolyte solution of a lithium ion battery slows dendrite formation to nil through 100 charge-discharge cycles.

The finding means that a great increase in energy storage is possible because dendrite formation can be eliminated in pure lithium electrodes.

The discovery is just the beginning of a process that could eventually see electrolyte additives, like nano diamonds, widely used to produce safe lithium batteries with a high energy density, Gogotsi noted. (IANS)

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Honor Sold Over 6 mn ‘8X’ Smartphones Globally

"Honor 8X" also became one of the highest selling phones in Germany, France, the Middle East, North America and South Asia, the company added

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Honor 8X
Over 6 mn '8X' smartphones sold globally: Honor. Flcikr

Chinese smartphone maker Huawei’s online focused sub-brand Honor on Friday announced that it sold over 6 million units of the recently launched “Honor 8X” globally, becoming the top “Singles Day” performer in terms of sales volume and revenue under the smartphone category.

In India, over 1 million units of Honor products were sold during the Diwali festive period, with “Honor 9N” and “Honor 8X” being the most popular products on Flipkart’s Big Billion Days and Amazon India respectively on the first selling day, the company said.

Honor, huawei
Honor. IANS

“As a thanksgiving for our Indian consumers, we would like to announce that unlike other smartphone brands, Honor will not increase the price of its smartphones this year,” said P. Sanjeev, Vice President, Sales, Consumer Business Group, Huawei.

“Honor 8X” also became one of the highest selling phones in Germany, France, the Middle East, North America and South Asia, the company added.

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“Honor 8X”, launched in October in India, comes in three variants — 4GB+64GB, 6GB+64GB and 6GB+128GB, priced at Rs 14,999, Rs 16,999 and Rs 18,999 respectively. (IANS)