Recently, Dr. Mathieu Morcrette (co-coordinator of the benchmarking research area at RS2E with Dr. Bernard Lestriez) went to Korea for one week with Sébastien Cavalaglio (research engineer) to test a set of three prototyping machines (a coater, a winder and a pressing machine) aimed at improving technological research capabilities of RS2E.
The machines are made by Media Tech and PNT (People and Technology), two companies specialized in batteries' manufacturing equipment. They are used worldwide by major research groups and companies. The new equipment will enable RS2E’s partners to test new battery technologies in conditions that are close to industry standards. More precisely, the machines allow to spread active material on rolls of copper (negative electrode) and aluminum (positive electrode). The rolls are then cut to smaller sizes and assembled together to form so-called 18650 cells (picture). 18650-type cells are used in commercial products such as laptops or electric vehicles batteries. Therefore, it’s an excellent way to test new materials for battery or supercapacitors in “real” conditions.
In the coming weeks the equipment will be shipped to Amiens. Media Tech and PNT’s engineers will then proceed to the calibration of the three machines.
A more detailed report will be released once the three machines are up and running.
Last year RS2E’s director Jean-Marie Tarascon has been appointed professor at Collège de France at the chair “Materials chemistry and energy”. It is a tradition for Collège de France’s professors to give an inaugural lecture at the beginning of their tenure.
Prof. Tarascon's lecture title is “Materials chemistry and energy: examples of a millennial story”. His historical review will address the links between human history and the development of new materials, with a particular focus on materials for energy storage and conversion.
Jean-Marie Tarascon began his carrier by researching superconductivity, he later shifted towards electrochemical energy storage research. One of his most famous achievement is his contribution to the development of the Li-ion polymer battery at Bellcore Labs in 1994. He is currently researching sustainable synthesis pathways for electrode materials as well as investigating future technologies (Na-ion batteries…). He is focusing on both technological research (70 patents filed) and basic research (cosigned more than 600 research papers).
Source: [Collège de France's Press Release]
J. B. Goodenough, R. Yazami, A. Yoshino and Y. Nishi are four pioneers of battery research. Their contributions to the field made the commercialization of Li-ion batteries possible. They have been awarded the 2014 Charles Stark Draper Prize by the National Academy of Engineering (USA) for their work.
In the early 80’s, Goodenough and Yazami respectively discovered the cathode and anode materials that are still used in most modern rechargeable batteries (lithium cobalt oxide for positive electrodes and graphite negative electrodes).
Yoshino experimented with those two discoveries to produce a rechargeable lithium-ion battery prototype in 1985.
Nishi, then at a senior position at Sony Corporation, developed the engineering processes allowing for the commercialization of the first Li-ion batteries in 1991.
The recipients offer a good example of the technology-development pipeline from basic research to technological research and market-driven engineering. At RS2E, we strive to replicate their prowess by bringing together research labs, technical-research agencies and privately-held companies.
Since 10 years, the “La Recherche” prize is awarding works at the crossroad between science and technology. This year, the editorial board of La Recherche (the research) chose to honor, in the physic category, the work of a team composed of Céline Merlet, Benjamin Rotenberg, Pierre-Louis Taberna, Patrice Simon and Mathieu Salanne. Those scientists are members of the CIRIMAT (Toulouse) and PECSA (Paris) labs, both being RS2E’s members. One English and one American researchers also participated to the research project.
The awarded study has been published in March 2012 in the prestigious journal, Nature Materials. It proposes a realist theoretical model that explains the mechanism at the origin of high capacitance values measured experimentally in some supercapacitors’ electrodes.
The ceremony was held Tuesday 22nd October at Quai Branly museum in Paris. The prize will also result in the honored work being featured in the next issue of La Recherche (#481).
Congratulations to this team full of energy!
A study published today in the world-class journal Science is presenting a new mechanism lending a better energy density in supercapacitors. Four scientists from CIRIMAT (a lab located in Toulouse, France): Yohann Dall’Agnese, Patrick Rozier, Pierre-Louis Taberna and Patrice Simon participated to the study. Professor Simon is the associate director of RS2E.
The link between US and French scientists was strengthened by the presence of Yohann Dall’Agnese, a PhD student in joint supervision between the two universities, whose work contributed to the results.
Researchers used materials called MXenes made of thin layers in-between which ions and molecules can be intercalated. As a consequence, capacitance up to 2 to 3 times higher than previously reported are displayed.