ULTRAFAST CHARGING Li-ION BATTERIES BASED ON NANOSTRUCTURED ELECTRODES

Summary

IMDEA Materials has developed high capacity nanostructured anodes (1D and 2D morphologies) for ultrafast-charging Li-ion batteries.

Description

Secondary lithium-ion batteries (LIBs) attracted tremendous interest due to their high energy density, good cycle life and efficiency compared to Pb-acid, Ni-MH and Ni-Cd batteries. Natural/ synthetic graphite is commonly used as anode for Li-ion batteries due to its low volume change during charge-discharge process. However, graphite anode is not suitable for a number of high energy/ power applications due to low specific capacity (< 372 mAh/g), and sluggish diffusion of Li-ions into the individual graphene layers. Lithium intercalation of graphite

anodes at lower potentials (<0.3V vs Li+/Li) also causes Li-dendrite growth, and challenges the overall safety of Li-ion batteries. These drawbacks of graphite anodes triggered extensive research focused on the development of alternative high-performance anode materials.  Conventional Li-ion storage through conversion and alloying reaction of high capacity anodes (Co3O4, WO3, etc.) usually resulted in severe capacity fading due to low electronic conductivity and severe volume change leading to the pulverization of electrodes. 

In order to mitigate these issues, we have developed high capacity nanostructured anodes (1D and 2D morphologies) for ultrafast-charging Li-ion batteries. Special features of the anodes resulted in pseudocapacitive Li-ion storage (extrinsic pseudocapacitance). 

Advantages and innovations

Diffusion independent nature of pseudocapacitive mechanism enables ultrafast charging (high power density) of the Li-ion battery. Synergy between the conventional Li-ion storage and pseudocapacitive process ensures high energy density. Li-ion batteries capable of superfast charging (up to 3s) and ultralong life (up to 30,000 cycles) can be fabricated based on the newly developed nanoengineered anodes.

Supplementary data

Application: rechargeable batteries

Intellectual property rights: European Patent application

Transfer Opportunity: License of technology

Contact

Knowledge & Technology Transfer Department, IMDEA Materials Institute

email: techtransfer.materials@imdea.org 

telephone: +34 91 5493422