Fast and durable batteries to come
A promising anode material for lithium-ion batteries could unlock extremely fast battery charging for electric vehicles
With the climate change concerns, an ever-increasing number of researchers are currently focusing on improving electric vehicles (EVs) to make them a more attractive alternative to conventional gas cars. The battery improvement of EVs is a key issue to attract more drives. In addition to safety, autonomy, and durability, most people want quickness in charging. Currently, it takes 40-minute with state-of-the-art EVs while gas cars can be ‘recharged’ in no longer than five minutes. The charging time needs to be below 15 minutes to be a viable option.
Poly (benzimidazole), the precursor for the proposed anodematerial, can be derived from biological processes and processed easily to create fast-charging lithium-ion batteries. Their adoption in electric vehicles will make them more attractive to consumers over conventional cars, leading to a cleaner environments and reduced CO2 emissions.
Noriyoshi Matsumi from JAIST
Unsurprisingly, lithium-ion batteries (LIBs), which are used everywhere with portable electronic devices, have been recognized as an option in the field of EVs, and new strategies are always being sought to improve their performance. One way to shorten the charging time of LIBs is to increase the diffusion rate of lithium ions, which in turn can be done by increasing the interlayer distance in the carbon-based materials used in the battery’s anode. While this has been achieved with some success by introducing nitrogen impurities (technically referred to as ‘nitrogen doping’), there is no method easily available to control interlayer distance or to concentrate the doping element.
Against this backdrop, a team of scientists from Japan Advanced Institute of Science and Technology (JAIST) recently developed an approach for anode fabrication that could lead to extremely fast-charging of LIBs. The team, led by Prof. Noriyoshi Matsumi, consists of Prof. Tatsuo Kaneko, Senior Lecturer Rajashekar Badam, JAIST Technical Specialist Koichi Higashimine, JAIST Research Fellow Yueying Peng, and JAIST student Kottisa Sumala Patnaik, and their findings were published online on 24 Nov 2021 in Chemical Communications.
Their strategy constitutes a relatively simple, environmentally sound, and highly efficient way to produce a carbon-based anode with very high nitrogen content. The precursor material for the anode is poly (benzimidazole), a bio-based polymer that can be synthesized from raw materials of biological origin. By calcinating this thermally stable material at 800 °C, the team managed to prepare a carbon anode with a record-setting nitrogen content of 17% in weight. They verified the successful synthesis of this material, and studied its composition and structural properties using a variety of techniques, including scanning electron tunneling microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy.
To test the performance of their anode and compare it with the more common graphite, the researchers built half-cells and full-cells, and conducted charge–discharge experiments. The results were very promising, as the proposed anode material proved suitable for fast charging, thanks to its enhanced lithium-ion kinetics. Moreover, durability tests showed that the batteries with the proposed anode material retained about 90% of its initial capacity even after 3,000 charge-discharge cycles at high rates, which is considerably more than the capacity retained by graphite-based cells.
Excited about the results, Professor Matsumi comments, “The extremely fast charging rate with the anode material we prepared could make it suitable for use in EVs. Much shorter charging times will hopefully attract consumers to choose EVs rather than gasoline-based vehicles, ultimately leading to cleaner environments in every major city across the world.”
Another notable advantage of the proposed anode material is the use of a bio-based polymer in its synthesis. As a low-carbon technology, the material naturally leads to a synergistic effect that reduces CO2 emissions further. Additionally, as Professor Matsumi remarks, “The use of our approach will advance the study of structure–property relationships in anode materials with rapid charge–discharge capabilities.”
Modifications to the structure of the polymer precursor could lead to even better performance, which might be relevant for the batteries not only of EVs, but also of portable electronics. Finally, the development of highly durable batteries will decrease the global consumption of rare metals, which are non-renewable resources.
Let us all hope future progress in this field will pave the way to the widespread adoption of electric cars and other ecofriendly technologies.
Original publication
Other news from the department science
![[Fe]-hydrogenase catalysis visualized using para-hydrogen-enhanced nuclear magnetic resonance spectroscopy](https://img.chemie.de/Portal/News/675fd46b9b54f_sBuG8s4sS.png?tr=w-712,h-534,cm-extract,x-0,y-16:n-xl)
These products might interest you
Spinsolve Benchtop NMR by Magritek
Spinsolve Benchtop NMR
Spinsolve is a revolutionary multinuclear NMR spectrometer that provides the best performance
Eclipse by Wyatt Technology
FFF-MALS system for separation and characterization of macromolecules and nanoparticles
The latest and most innovative FFF system designed for highest usability, robustness and data quality
HYPERION II by Bruker
FT-IR and IR laser imaging (QCL) microscope for research and development
Analyze macroscopic samples with microscopic resolution (5 µm) in seconds
Get the chemical industry in your inbox
From now on, don't miss a thing: Our newsletter for the chemical industry, analytics, lab technology and process engineering brings you up to date every Tuesday and Thursday. The latest industry news, product highlights and innovations - compact and easy to understand in your inbox. Researched by us so you don't have to.
Most read news
More news from our other portals
See the theme worlds for related content
Topic World Battery Technology
The topic world Battery Technology combines relevant knowledge in a unique way. Here you will find everything about suppliers and their products, webinars, white papers, catalogs and brochures.
Topic World Battery Technology
The topic world Battery Technology combines relevant knowledge in a unique way. Here you will find everything about suppliers and their products, webinars, white papers, catalogs and brochures.
