If you need to know about batteries; you’ve come to the right place
Chinese flag点击这里访问我们的中文网站Chinese flag

cathodes

Evidence for high-powered lithium-rich cathodes found by international research team

Wed, 06/30/2021 - 10:43 -- paul Crompton
Venkat Viswanathan, associate professor of mechanical engineering at Carnegie Mellon

An international team of researchers investigating anionic redox activity have found evidence of why lithium-rich cathodes have greater energy storage capacity. 

The team used synchrotron radiation to directly observe anionic redox reactions in a lithium-rich battery material.

The researchers performed Compton scattering experiments to observe how the electronic orbital that lies at the heart of the reversible and stable anionic redox activity can be imaged and visualised, and its character and symmetry determined.

The discovery explains the increase of energy density in lithium-rich batteries.

The researchers performed theoretical and experimental studies at SPring-8— the world’s largest third-generation synchrotron radiation facility, which is operated by Japan Synchrotron Radiation Research Institute  (JASRI).

The team’s findings were published in the journal Nature.

Collaborating institutions included: Carnegie Mellon University, Northeastern University, Lappeenranta-Lahti University of Technology (LUT) in Finland, and institutions in Japan including Gunma University, JASRI, Yokohama National University, Kyoto University, and Ritsumeikan University.

Conclusive evidence

Venkat Viswanathan (pictured), associate professor of mechanical engineering at Carnegie Mellon, said: “We have conclusive evidence in support of the anionic redox mechanism in a lithium-rich battery material.

“Our study provides a clear picture of the workings of a lithium-rich battery at the atomic scale and suggests pathways for designing next-generation cathodes to enable electric aviation. The design for high-energy density cathodes represents the next frontier for batteries.”

Researchers attribute lithium-rich cathodes' ability to store much higher storage capacity to the anionic redox mechanism—in this case, oxygen redox.

While previous research has proposed alternative explanations of the anionic redox mechanism, it could not provide a clear image of the quantum mechanical electronic orbitals associated with redox reactions because this cannot be measured by standard experiments.

Bernardo Barbiellini, professor of Computational Material Science at LUT University, said: "How to get more energy in a smaller space is the core in battery development. In order to improve the efficiency, we need to profoundly understand the battery chemistry.

"In this study, we examined advanced battery materials that carry several mechanisms performing chemical reactions. 

"We want to see and understand how particles such as Li-ions and electrons move and how they release electrical energy while interacting with oxygen atoms. 

"Our group has simulated the working of the positive electrode, and based on our calculations, we generated a model to be verified. With high-energy X-ray measurements, the so-called Compton scattering method, we were able to visualise the electron's state near the oxygen atom in the cathode.

"But the machine and the images alone are not valuable. The model gives us an understanding of what we are seeing. With our joint effort, we are able to contribute to improving existing battery materials and designing new ones.”

The conclusion of the team’s paper states: “It is important to keep in mind that the energy density in a lithium battery pack in an electric car is about 0.4 MJ/liter, which is 100 times smaller than that in gasoline. 

“This large difference indicates that there is much room for improving energy densities of rechargeable battery materials and that further work in this direction is needed.

“Since high-energy x-rays can easily penetrate closed electrochemical cells, Compton scattering experiments provide a unique spectroscopic tool for monitoring changes in redox orbitals during charging and discharging processes, and thus facilitate the design and development of high- performance rechargeable batteries.”

Sign-up to our FREE weekly industry newsletter, to get the weeks news delivered to your inbox every Monday.

Researchers increase performance capabilities of lithium-sulfur cathode by 50%

Thu, 10/10/2019 - 15:37 -- paul Crompton

Scientists from Singapore-based NanoBio Lab (NBL) have developed a means of making lithium-sulfur cathodes that increase specific energy and curbs capacity fade. 

The team began by building the carbon host before adding the sulfur source to obtain a 3D interconnected porous nanomaterial.

Image (from left) The NBL research team: Dr. Ayman Abdel Hamid, Jian Liang Cheong and professor Jackie Y. Ying

Sign-up to our FREE weekly industry newsletter, to get the weeks news delivered to your inbox every Monday.

Lithium Australia to test cathodes using LFP recycled from lithium-ion batteries

Tue, 08/13/2019 - 11:59 -- paul Crompton
Lithium Australia to test cathodes using LFP recycled from lithium-ion batteries

Battery materials firm Lithium Australia is to test the performance capabilities of coin cell cathodes using recycled lithium phosphate (LP) after recovering the material from old lithium-ion batteries for the first time.

The material, recovered from mixed metal dust, will be made into lithium-iron-phosphate (LFP) cathode powder at the company’s wholly-owned subsidiary VSPC’s cathode powder pilot plant, in Brisbane, Australia.

Sign-up to our FREE weekly industry newsletter, to get the weeks news delivered to your inbox every Monday.

Australia urged to take on Asia in battery hub bid

Wed, 05/30/2018 - 09:12 -- John Shepherd
Australia urged to take on Asia in battery hub bid

Mining firms have unveiled a blueprint they say could transform Australia into a global battery development hub— and grab a multi-billion-dollar slice of the “lithium value chain”.

A new report from Australia’s Association of Mining and Exploration Companies (AMEC) calls on the federal government to declare battery minerals processing an “industry priority”— and use tax breaks and other incentives to entice global industry giants to the country to kick-start a domestic battery industry.

Sign-up to our FREE weekly industry newsletter, to get the weeks news delivered to your inbox every Monday.

Samsung SDI invests in Chile cathode project

Mon, 03/19/2018 - 11:29 -- John Shepherd

South Korean battery maker Samsung SDI is part of an international consortium cleared to invest in developing battery materials facilities in Chile.

Samsung is among companies from South Korea and China expected to invest a total $754 million in the project, the Chilean Economic Development Agency (Corfo) confirmed.

 

Sign-up to our FREE weekly industry newsletter, to get the weeks news delivered to your inbox every Monday.

Tesla mulls lithium investment in Chile

Mon, 02/05/2018 - 11:03 -- John Shepherd
Tesla mulls lithium investment in Chile

BBB has confirmed that Tesla is considering proposals to invest in lithium production in Chile— and that the carmaker could also support the launch of a battery cathodes production facility in the country.

The CEO of Chilean Economic Development Agency (Corfo), Eduardo Bitran (pictured), met Tesla bosses in the US recently to discuss a potential initial investment in Chilean lithium producer Sociedad Quimica y Minera de Chile (SQM), the agency told BBB this week.

 

Sign-up to our FREE weekly industry newsletter, to get the weeks news delivered to your inbox every Monday.

South Korea-China deal to ease battery tension?

Mon, 02/05/2018 - 10:52 -- Xuan Zhong
South Korea-China deal to ease battery tension?

Chinese and South Korean businesses have formed two new joint ventures to produce lithium-ion battery materials from bases in China.

The move follows months of claims and counter claims over China’s alleged “blocking” of South Korean batteries in a heated trade spat.

Sign-up to our FREE weekly industry newsletter, to get the weeks news delivered to your inbox every Monday.

Discovery could lead to 50% higher energy density next generation lithium-ion battery

Tue, 06/07/2016 - 14:57 -- paul Crompton
Discovery could lead to 50% higher energy density next generation lithium-ion battery

Next generation lithium-ion batteries could use lithium rich cathodes after a discovery at the Department of Energy’s Lawrence Berkeley National Laboratory.

The research group, led by Gerbrand Ceder of Berkeley Lab’s Materials Sciences Division, came to the conclusion after studying how and when oxygen is active in lithium-excessive cathodes.

Sign-up to our FREE weekly industry newsletter, to get the weeks news delivered to your inbox every Monday.
Subscribe to cathodes