World News

World News28.08.2024

Japan’s manganese-boosted EV battery hits game-changing 820 Wh/Kg, no decay

QAZAQ GREEN. Japanese researchers at Yokohama National University have demonstrated a promising alternative to nickel and cobalt-based batteries for electric vehicles (EVs), reports Interesting Engineering.

Their approach uses manganese in the anode to create a high-energy density battery that is both cost-effective and sustainable.

EV manufacturers prefer nickel and cobalt batteries since they deliver higher energy density, translating to more range in a smaller battery pack. However, both components are expensive to source and relatively rare, making them unsustainable options when EV usage soars worldwide.

CGI art and firetex, the best of IE this weekThe video player is currently playing an ad. You can skip the ad in 5 sec with a mouse or keyboard

Lithium-ion (Li-ion) batteries are the preferred rechargeable battery option for most electronics. However, their lower energy density puts them on the back foot regarding EVs. Research and development efforts to improve them have led to the introduction of better Li-ion options.

Manganese in the anode material alongside lithium, such as LiMnO2, has also been experimented with. However, applications have been limited due to the electrode’s poorer performance. Researchers at Yokohama National University (YNU) in Japan have addressed this issue in their recent work.

Working with a monoclinic system

After extensively studying LiMnO2 in its various forms using X-ray diffraction, scanning electron microscopy, and electrochemical methods, researcher Naoaki Yabuuchi and his team at YNU found that a monoclinic layered domain activates the structural transition of LiMnO2 to a spinel-like phase. A monoclinic system is a type of group symmetry of a solid crystalline structure.

LiMnO2 improves the electrode material’s performance by facilitating the phase transition. Without the phase transition, a LiMnO2 electrode has sub-optimal performance.

“From this finding, nanostructured LiMnO2 with the monoclinic layered domain structures and high surface area has been directly synthesized using a simple solid-state reaction,” Yabuuchi said in a press release.

The reaction has no intermediary steps and can be directly synthesized from two components using a calcination process.

Performance improvements with Mn

Post-synthesis testing revealed that a battery with a LiMnO2 electrode reached an energy density of 820 watt-hours per kilogram (Wh kg-1) compared to a 750 Wh per kg obtained with a nickel-based battery. Only lithium-based batteries have an even lower energy density of 500 Wh per kg.

Nanostructured LiMnO2 with domain structures and larger surface area delivers large reversible capacity with good capacity retention with excellent charge rate-capability, which is an essential character for electric vehicle applications. Image credit: Yokohama National University

The researchers told Interesting Engineering in an email that manganese, when used in other polymorphs, typically shows half the energy density capacity.

Previous work using manganese reported a voltage decay in batteries, wherein voltage output dropped over time, reducing the electronic device’s performance. However, with the LiMnO2 electrode, the researchers did not observe such outcomes.

Manganese dissolution, either due to phase changes or a reaction with an acidic solution, can still occur. The press release added that the researchers plan to address this using a highly concentrated electrolyte solution and a lithium phosphate coating.

The researchers are confident that their work has contributed to developing a new offering that is competitive with existing options, sustainable to produce, and environmentally friendly in the long run. They look forward to commercializing their technology and its usage in the EV industry.

The research team added in their email to IE, “We have found a very cheap methodology, and that is the important finding of our study. “

 

24.06.2025
Hydropower projects selected through KOREM Auction in Kazakhstan
24.06.2025
EU reaches political deal to simplify CBAM
24.06.2025
New research could unlock the potential of bladeless wind turbines
24.06.2025
Uzbekistan to launch 16 renewable energy facilities by the end of 2025
23.06.2025
Kazakhstan holds auction for 50 MW of small hydropower projects
23.06.2025
Kazakhstan and EBRD strengthen partnership on decarbonisation and renewable energy
23.06.2025
$200 million solar energy complex breaks ground in Egypt
23.06.2025
Official report revealed causes of Spain's blackout
20.06.2025
Kazakhstan’s Southern power grid to expand with new 20 mw solar station
19.06.2025
Kazakhstan and Azerbaijan to join forces to export clean energy to Europe
18.06.2025
KSN Solar wins auction for 20 MW solar power plant in Kazakhstan
18.06.2025
Just 2% of tidal and offshore solar energy could make dent in CO2 emissions, Study finds
18.06.2025
1 GW wind farm to be built in Kazakhstan’s Pavlodar region
17.06.2025
KSN Solar wins auction for 20 mw solar power plant in Southern Kazakhstan
17.06.2025
Kazakhstan showcases renewable energy investment opportunities at Power Central Asia + China Forum
16.06.2025
Renewable energy auction results: Vigor Holding to build 30 MW Solar Power Plant
16.06.2025
Kazakhstan and China seal major energy agreements at Power Central Asia + China
16.06.2025
China’s largest energy storage project enters commissioning phase
16.06.2025
Power Central Asia + China Forum launches strategic projects in petrochemicals and green energy
13.06.2025
Astana to host the first Regional Energy Forum "Power Central Asia – China"