3 août 2021

[Energy-Storage] – Alkaline earth metal vanadates: new anode materials for high performance sodium-ion batteries.

Accueil > Actualités > [Energy-Storage] – Alkaline earth metal vanadates: new anode materials for high performance sodium-ion batteries.
Flèche contenu
enregy storage codex international

Sodium-ion battery, as an emerging battery technology beyond lithium-ion battery, has attracted great research interests recent years. Sodium-ion batteries have a similar configuration and electrochemical reaction processes with lithium-ion batteries. But the Na resources are much more abundant and cost-effective than Li resources, which makes sodium-ion batteries highly promising as next-generation energy storage devices, especially for large-scale energy storage. However, the practical application of Na-ion batteries is still not currently realized.

Finding suitable electrode materials, especially anode materials, is a very important task for the development of sodium-ion batteries. « The larger ionic size of Na+ than Li+results in a significantly different insertion reaction process. Hence the commercialized graphite anode for Li-ion battery cannot be used in Na-ion battery. » says Liqiang Mai, a professor at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology (WUT).

In the past five years, large numbers of research works about Na-ion battery anodes have been reported. The previously reported anodes mainly include the following categories: hard carbon, Ti-based anodes, conversion reaction based anodes and alloying reaction based anodes. However, these anodes still face some challenges for commercialization.

For example, hard carbon is limited by a poor rate capability and safety issues; Ti-based anodes generally display low capacity due to limited intercalation sites; other anode materials based on conversion or alloying reactions can deliver high initial capacity, but the inevitable large volume change during the discharge/charge process is a serious issue.

In this case, finding new anode materials with intrinsically good electrochemical properties are still very important for the development of SIBs.


Découvrez aussi
[Nanoparticles] – Copper oxide sub-nanoparticle catalysts prove most superior 23 février 2020

Scientists at Tokyo Institute of Technology have shown that copper oxide particles on the sub-nanoscale are more powerful catalysts than those on the nanoscale. These subnanoparticles can also catalyze the oxidation reactions of aromatic hydrocarbons far more effectively than catalysts currently used in industry.

Lire la suite
[Nano-Technology] – New materials could enable longer-lasting implantable batteries 24 novembre 2022

For the last few decades, battery research has largely focused on rechargeable lithium-ion batteries, which are used in everything from electric cars to portable electronics and have improved dramatically in terms of affordability and capacity. But nonrechargeable batteries have seen little improvement during that time, despite their crucial role in many important uses such as implantable medical devices like pacemakers.

Lire la suite