Researchers develop high-energy, high-efficiency all-solid-state sodium-air battery

researchers develop high-energy, high-efficiency all-solid-state sodium-air battery

Illustration depicting an electric vehicle charging station powered by high-energy, high-efficiency all-solid-state sodium-air cells. Credit: POSTECH

A research team has successfully developed a high-energy, high-efficiency all-solid-state sodium-air battery. This battery can reversibly utilize sodium (Na) and air without requiring special equipment. The team was led by Professor Byoungwoo Kang and Dr. Heetaek Park from the Department of Materials Science and Engineering at Pohang University of Science and Technology (POSTECH).

The findings have been published in the journal Nature Communications.

Secondary batteries find extensive use in green technologies such as electric vehicles and energy storage systems. The next-generation high-capacity secondary batteries, termed "metal-air batteries," draw power from abundant resources like oxygen and metals found on Earth. However, a challenge arises from the formation of carbonate—a byproduct of metal and oxygen reaction involving atmospheric carbon dioxide (CO2) and water vapor (H2O)—which sacrifices battery efficiency.

To address this, despite the name, metal-air batteries typically require additional equipment such as an oxygen permeation membrane to either purify oxygen or selectively use atmospheric oxygen.

In this research, the team employed Nasicon, which is a Na superionic conductor and a solid electrolyte, to effectively tackle the carbonate issue. Nasicon, comprising elements like Na, silicon (Si), and zirconium (Zr), serves as a solid electrolyte capable of ion movement in the solid state while demonstrating high electrochemical and chemical stability.

Leveraging this solid electrolyte, the team protected sodium metal electrodes from air and facilitated the breakdown of carbonate formed during electrochemical cell operation.

Consequently, the reversible electrochemical reaction involving carbonate led to an increase in the cell's energy density by increasing the working voltage while significantly reducing the voltage gap during charging and discharging, thus enhancing energy efficiency.

Moreover, the team's all-solid-state sodium-air cell exhibited superior kinetic capability through in-situ formed catholyte, which has a fast sodium ion conduction to the inside of the electrode. Remarkably, the cell operated solely on metal and air without additional special equipment for an additional oxygen filtration device.

Professor Kang who led the research remarked, "We've devised a method to harness carbonate, a longstanding challenge in the development of high-energy metal-air batteries. We hope to lead the field of the next generation all-solid-state metal-air batteries, leveraging a solid electrolyte-based cell platform that remains stable in ambient conditions and offers a broad voltage range."

More information: Heetaek Park et al, Activating reversible carbonate reactions in Nasicon solid electrolyte-based Na-air battery via in-situ formed catholyte, Nature Communications (2024). DOI: 10.1038/s41467-024-47415-0

Provided by Pohang University of Science and Technology

This story was originally published on Tech Xplore. Subscribe to our newsletter for the latest sci-tech news updates.

OTHER NEWS

25 minutes ago

Judges setting our energy policy is even more terrifying than the so-called climate crisis

25 minutes ago

Video: Love Island's Mimii is fuming at Ayo as he 'miserably fails her test' when he chooses Uma for a cheeky snog in  racy suck and blow challenge

25 minutes ago

Video: England's battle against the Danes ends in a stalemate after Three Lions struggled to draw ahead in tense Euros clash in Frankfurt - as William, WAGs and millions at home cheered on Southgate's men

25 minutes ago

'There is no actual proposal': Coalition's nuclear power policy slammed

25 minutes ago

At least 86 people hospitalised by E. coli outbreak linked to lettuce

25 minutes ago

Politician who pushed Philippines natural gas boom is behind firm that planned to profit

25 minutes ago

Theresa Nist says she's going to be a grandmother of 7: See photos, video

25 minutes ago

Ryan Garcia suspended one year, fined after positive PED tests

25 minutes ago

All Black Hodgman named in Schmidt's first Wallabies squad

25 minutes ago

SingPost appoints financial adviser for strategic review of Australia businesses

25 minutes ago

Fires ignite debate on battery recycling and disposal

25 minutes ago

PM calls for more gas supply amid operator warning

25 minutes ago

Penfolds hikes prices in bid to reclaim top billing in China

28 minutes ago

Record heat impact on utilities: Here's what to know

28 minutes ago

‘Pharma Bro’ or Barron? Debate on brains behind Donald Trump crypto coin rages

31 minutes ago

Mushahid Hussain becomes first Pakistani to address BRICS forum, slams Western role in Gaza

31 minutes ago

California Supreme Court rules on the Taxpayer Protection Act

31 minutes ago

Colts' TE Jelani Woods wants to earn spot back as pivotal member of offense

31 minutes ago

UnitedHealth issues breach notification on Change Healthcare hack

31 minutes ago

FAA investigating Southwest flight that flew just 525 feet above Oklahoma town, triggering altitude warning

31 minutes ago

I've invested in 19 businesses... create the perfect pitch by dodging these 10 common mistakes

31 minutes ago

Shein and Temu loyalists, buckle up for tax tariffs as of July

31 minutes ago

Southgate admits England are 'falling short' after Denmark draw

35 minutes ago

Does your child have special powers? Here are the six signs you have a gifted 'Crystal Child' - from trouble sleeping to knowing things they shouldn't

35 minutes ago

How did I meet my Oxbridge graduate fiancé? I was a sex worker ... he was my client

37 minutes ago

Healthy packed lunches for the office

37 minutes ago

Carol Burnett Reunites with Dick Van Dyke While Being Honored at Her Handprint Ceremony

37 minutes ago

Harry Kane admits England 'not sure' over pressing roles after latest concerning display at Euro 2024

37 minutes ago

Andie MacDowell admits she struggled to say L'Oreal's iconic slogan 'because I'm worth it' during her nearly 40-year partnership with the brand over fears it made her seem vain

37 minutes ago

Work Advice: Why won’t my old employer hire me back?

37 minutes ago

Polar blast and rain burst threatens to ruin weekend for many Aussies

37 minutes ago

Strategic battlefield defeat would be end of Russia's statehood, Putin claims

38 minutes ago

Messi sets all-time record for Copa America appearances

38 minutes ago

Ryan Murphy makes Olympic trials history with 100, 200 backstroke sweep

40 minutes ago

Access to MAID, abortions raises questions about the limits of B.C. faith-based health care

40 minutes ago

Calls for federal audit of ballooning North Shore Wastewater Treatment Plant costs

43 minutes ago

Chinese migrant wanted for LA murder brazenly tries to sneak back into US, finally gets caught: sources

44 minutes ago

Wallaby lock Rodda joins second division Provence

44 minutes ago

Eminem hit back in top 40 as Nigel Farage adopts it as election anthem

44 minutes ago

Glass JoyJolt Coffee Mugs Are Recalled After Hot Liquid Causes Some to Break