With Telsa in the lead, the electric vehicle market is growing around the world. Unlike conventional cars that use internal combustion engines, electric cars are solely powered by lithium ion batteries, so the battery performance defines the car’s overall performance. However, slow charging times and weak power are still barriers to be overcome.
In light of this, a POSTECH research team has recently developed a faster charging and longer lasting battery material for electric cars.
The research teams of Professor Byoungwoo Kang and Dr. Minkyung Kim of the Department of Materials Science and Engineering at POSTECH and Professor Won-Sub Yoon in the Department of Energy Science at Sungkyunkwan University have together proved for the first time that when charging and discharging Li-ion battery electrode materials, high power can be produced by significantly reducing the charging and discharging time without reducing the particle size. These research findings were published in the recent issue of Energy & Environmental Science, a leading international journal in the energy materials field.
For fast charging and discharging of Li-ion batteries, methods that reduce the particle size of electrode materials were used so far. However, reducing the particle size has a disadvantage of decreasing the volumetric energy density of the batteries.
To this, the research team confirmed that if an intermediate phase in the phase transition is formed during the charging and discharging, high power can be generated without losing high energy density or reducing the particle size through rapid charging and discharging, enabling the development of long-lasting Li-ion batteries.
In the case of phase separating materials that undergo the process of creating and growing new phases while charging and discharging, two phases with different volumes exist within a single particle, resulting in many structural defects in the interface of the two phases. These defects inhibit the rapid growth of a new phase within the particle, hindering quick charging and discharging.
Using the synthesis method developed by the research team, one can induce an intermediate phase that acts as a structural buffer that can dramatically reduce the change in volume between the two phases in a particle.
In addition, it has been confirmed that this buffering intermediate phase can help create and grow a new phase within the particle, improving the speed of insertion and removal of lithium in the particle. This in turn proved that the intermediate phase formation can dramatically increase the charging and discharging speed of the cell by creating a homogenous electrochemical reaction in the electrode where numerous particles is composed of. As a result, the Li-ion battery electrodes synthesized by the research team charge up to 90% in six minutes and discharge 54% in 18 seconds, a promising sign for developing high-power Li-ion batteries.
“The conventional approach has always been a trade-off between its low energy density and the rapid charge and discharge speed due to the reduction in the particle size,” remarked Professor Byoungwoo Kang, the corresponding author of the paper. He elaborated, “This research has laid the foundation for developing Li-ion batteries that can achieve quick charging and discharging speed, high energy density, and prolonged performance.”
The Latest Updates from Bing News & Google News
Go deeper with Bing News on:
Charging electric cars
- Tesla isn't dominating the electric bike market, but here are the players that mighton November 28, 2020 at 12:00 pm
Tesla's Elon Musk was turned off motorcycles by a crash, but from icons like Harley Davidson to upstarts like Lime, electric bikes are becoming a big business.
- This new feature is about to make electric cars way easier to useon November 28, 2020 at 3:05 am
Wireless charging will offer drivers a kind of convenience people will get used to fast, making it much easier for many to own an electric vehicle.
- Roadside Attractions - A Startup’s Plan To Support Britain’s Green Car Revolutionon November 28, 2020 at 1:38 am
The U.K. is has brought forward its deadline for all-electric new car sales but demand for charging points will mean a huge infrastructure roll-out. Is this something a startup should be getting ...
- Could hydrogen-electric cars be crucial to meeting climate goals?on November 27, 2020 at 3:22 pm
SACRAMENTO — As California pushes to end the sale of gas-powered cars by 2035, a rivalry over which types of green vehicles will replace the internal combustion engine is playing out. The dominant ...
- Electric Vehicle Charging Infrastructure Market 2020 Research, Key Players, Industry Overview, Supply and Consumption Analysis 2026on November 27, 2020 at 9:16 am
The Electric Vehicle Charging Infrastructure Market report provides an in-depth analysis of the Semiconductor & Electronics during the forecast period 2017-2026 which consists of the industry overview ...
Go deeper with Google Headlines on:
Charging electric cars
Go deeper with Bing News on:
High-power Li-ion batteries
- Electrode Paves Way for EV Battery Charging in Minuteson November 22, 2020 at 4:00 pm
“This research has laid the foundation for developing Li-ion batteries that can achieve quick ... These results show promise for future development of high-power, fast-charging lithium-ion batteries, ...
- The GDE18V-26D SDS-plus Bulldog Mobile Dust Extractor Kit with CORE18V 4.0 Ah Compact Batteryon November 20, 2020 at 2:26 pm
deep into concrete. The kit features a CORE18V 4.0 Ah Compact Battery, which have next-gen Li-ion 21700 cell technology for optimal performance in a lightweight, high-power battery. Each GBA18V40 ...
- A World First: Combining Flow Batteries with Tidal Power to Create Hydrogenon November 19, 2020 at 2:18 am
The European Marine Energy Centre in Scotland announced it would be installing a 1.8-MWh flow battery at the organization’s tidal energy pilot site. They will combine it with tidal power to create ...
- Potential Contenders For Battery Supremacyon November 18, 2020 at 4:00 pm
Low weight and high power output were game changing — technologies ... Dendrite formation has long prevented the use of lithium metal anodes in Li-Ion batteries. Researchers believe solid ...
- The ultimate conditions to get the most out of high-nickel batterieson November 17, 2020 at 4:00 pm
In the paper, 'The effects of Ambient Storage Conditions on the Structural and Electrochemical Properties of NMC-811 Cathodes for Li-ion batteries,' published in the journal Electrochimica Acta ...