The present invention involves the development of printed thin-film graphene on metal current collectors using printing technology for high-voltage and long-cycle lithium-ion batteries. This advancement helps suppress corrosion, enhances the adhesion of active materials, and improves electrochemical kinetic performance.
Figure (1) Scanning electron microscopy (SEM) image of printed graphene on metal current collector; (2) Pouch battery fabricated using inkjet printable graphene ink.
In Lithium-ion batteries (LIBs), the current collector is crucial for ensuring long cycle life. However, metal current collectors often struggle under high voltage conditions due to localized surface corrosion. Researchers have attempted to mitigate this issue by modifying the current collectors, but many of these techniques inadvertently increase internal resistance, reduce power density, and shorten battery life. While graphene coatings on metal current collectors have been explored for improved performance, controlling the precise mass loading of active carbon materials and the design of carbon collectors remains challenging.
- Environmentally Friendly and Cost-Effective: The solution is designed to be environmentally sustainable while also being cost-effective, reducing both production expenses and material waste.
- Novel Modified Metal Current Collector: A newly developed modified metal current collector has been fabricated using advanced printing technology and a novel graphene-based conducting material.
- Enhanced Corrosion Resistance: The uniformly printed graphene layer on the metal surface acts as an anti-corrosion barrier, significantly improving the stability and durability of the current collector.
- Improved Electrochemical Performance: The use of graphene results in lower sheet resistance and superior electrochemical performance, contributing to more efficient and longer-lasting electrochemical cells.
- Low Sheet Resistance: The printed graphene layer provides low sheet resistance, contributing to efficient charge transport and overall superior device performance.
A few nanometers thick graphene films have been printed on a metal current collector using digital printing technology for high-voltage cathode materials of Li-ion batteries. This innovation helps prevent corrosion and improves the electrochemical performance of cells. Electrodes based on lithium nickel manganese cobalt oxide (Li-NMC) cathodes were created using both bare and printed graphene on the metal current collector. A coin cell was also prepared using the Li-NMC electrode, 1M LiPF6 EC: EMC: DEC as the electrolyte, and Li foil as the counter electrode.
The invention has progressed beyond the Proof-of-Concept stage and is currently at the stage of early prototype development and/or validation in a relevant environment.
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The invention helps to improve lithium-ion batteries which can be used for energy storage and in healthcare devices. So, the invention helps in the promotion of better healthcare.
- Lithium-Ion Batteries: Enhances performance and durability.
- Energy Storage Systems: Especially for compact and portable devices.
- Wearable Devices: Supports flexible, lightweight energy solutions.
- Healthcare Electronics: Suitable for low-power medical and monitoring devices.
- Low Power Electronics: Improves efficiency in consumer and industrial electronics.
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