An international team of scientists — including several researchers from the U.S. Department of Energy’s (DOE) Argonne National Laboratory — has discovered an anode battery material with superfast charging and stable operation over many thousands of cycles.
Over the last several decades, a multidisciplinary team of battery scientists at Argonne helped launch the modern energy storage race by conducting extensive research on a host of materials for lithium-ion batteries with applications in hybrid and all-electric vehicles, as well as stationary energy storage for buildings and the electric grid.
“Most of the time, water is bad for non-aqueous lithium-ion batteries. But in this case, it can be downright good.” – Jun Lu, Argonne battery scientist and co-author of the Nature Communications article.
One of Argonne’s latest contributions to innovative new materials for lithium-ion batteries is a water-bearing compound, “lithium titanate hydrate,” developed in collaboration with researchers from Tsinghua University in Beijing and the Massachusetts Institute of Technology. This material, discussed in a recent Nature Communications article, could replace the graphite anode commonly used in lithium-ion batteries.
As Jun Lu, Argonne battery scientist and co-author, explained, past research had identified lithium titanate as a promising anode material because of its potential for fast charging and long cycle life, as well as safer operation compared with graphite. In synthesizing this material, researchers used a water-based process that involved a final step of heating the anode material to very high temperature (above 500°C) to drive out the water completely. This step was needed because, during battery operation with this material, the water would react with the electrolyte and degrade performance.
Argonne Distinguished Fellow Khalil Amine, who also co-authored the study, noted that the heating to such a high temperature caused unwanted coarsening and clumping of the structure. The international team found that, by heating the anode material to a much lower temperature (less than 260°C), they could remove the water near the surface, but retain the water in the bulk of the material without coarsening and clumping of the structure. When the scientists tested the material in the laboratory, cycling stability improved and capacity degraded only slightly over 10,000 cycles. The material also charged very quickly — within less than two minutes — the team found. As noted by Jun Lu, “Most of the time, water is bad for non-aqueous lithium-ion batteries. But in this case, it can be downright good.”
The research team tracked how material composition and structure changed when heated by using various advanced characterization techniques, including x-ray diffraction provided by the Advanced Photon Source, a DOE Office of Science User Facility located at Argonne. When analyzing the combined characterization data, the team reported that the trapped water in the anode material improved performance by promoting structural diversity and forming nanostructures. The video above shows the change in composition and structure as the starting material is heated and water is expelled to form a new layered structure (LS), then the desired hydrated nanostructure (HN), then beyond the desired structure all the way to a completely dehydrated nanostructure (DN).
Looking to the future, Jun Lu observed that, because water is everywhere in nature and common in chemical synthesis, the fabrication approach reported in this research could open the door to discovery of other high-performance electrode materials.
Learn more: The wet road to fast and stable batteries
The Latest on: Anode battery material
- Engineered electrode material moves battery research closer to 'holy grail'on October 8, 2020 at 11:04 am
High energy, high rate, and long cycle life - the ''holy grail'' of battery research is never closer thanks to an engineered electrode material.
- Engineered electrode material moves battery development closer to fast chargingon October 8, 2020 at 11:02 am
Electric vehicles are gaining in popularity, but their long charging time is a significant detraction for potential customers. While a typical SUV with a combustion engine could travel 300 miles with ...
- Nouveau Monde’s Research & Development Consortium Advances its Carbon-Neutral Battery Anode Programon October 7, 2020 at 3:44 pm
Nouveau Monde’s R&D consortium, led by Professor Lionel Roué of the Institut national de la recherche scientifique, advances its proprietary lithium-ion battery anode program with an important ...
- Tesla’s New Tabless Batteries Unlock New Levels Of Performanceon October 6, 2020 at 5:00 pm
the entire base enables current to flow to the active material. Enter “tabless” batteries. Rather than having a small battery tab attached to the anode and cathode respectively, the entire ...
- Nouveau Monde and Forge Nano Sign a Collaboration Agreement for Advanced Coatings for Li-Ion Battery Anode Materialon October 6, 2020 at 2:29 pm
Coating of Nouveau Monde’s spherical graphite represents the final and most advanced step in the value chain of battery anode material, generating attractive profit margins. Forge Nano’s advanced ...
- Green Science Alliance Developed Lithium Sulfur Battery as Next Generation Rechargeable Batteryon October 6, 2020 at 5:55 am
Lithium ion batteries are one of the most popular rechargeable batteries nowadays and researchers have been challenging to make various type of electrodes, electrolyte materials in order to create ...
- Nouveau Monde and Forge Nano Sign a Collaboration Agreement for Advanced Coatings for Li-Ion Battery Anode Materialon October 6, 2020 at 1:15 am
Coating of Nouveau Monde’s spherical graphite represents the final and most advanced step in the value chain of battery anode material, ...
- Nouveau Monde and Forge Nano Sign a Collaboration Agreement for Advanced Coatings for Li-Ion Battery Anode Materialon October 6, 2020 at 1:13 am
Coating of Nouveau Monde’s spherical graphite represents the final and most advanced step in the value chain of battery anode material, generating attractive profit margins. Forge Nano ...
- PRESS RELEASE: NOUVEAU MONDE AND FORGE NANO SIGN A COLLABORATION AGREEMENT FOR ADVANCED COATINGS FOR LI-ION BATTERY ANODE MATERIALon October 6, 2020 at 1:00 am
Alliance NOUVEAU MONDE AND FORGE NANO SIGN A COLLABORATION AGREEMENT FOR ADVANCED COATINGS FOR LI-ION ...
- tabless batteryon October 5, 2020 at 10:04 am
As announced at their Battery Day keynote, Tesla has been working hard on a broad spectrum of projects to take battery technology to the next level in order to reach their goal of 3 TWh annual ...
via Google News and Bing News