.png?width=517&height=128&name=Group%20(2).png "Group (2)")
Battery Additives for lithium-ion
Borregaard's solutions have been the industry standard for lead battery systems for decades. Now, we have focused our knowledge and expertise towards today’s most rapidly growing energy storage technology: Lithium-ion (Li-ion) batteries.
We offer high-performance additives designed to improve electrode properties and safety of Li-ion batteries, and to serve as processing aids to increase production throughput and reduce manufacturing costs. All our products are derived from Norway Spruce, offering a more sustainable and environmentally friendly alternative to synthetic options.
Lithium-ion batteries have become the leading choice for portable applications, such as mobile phones, laptops and electric vehicles. Li-ion batteries outperform other technologies due to their high energy density, light weight and long lifetime.
As demands for greater performance, safety, and sustainability continue to grow, the battery industry is constantly searching for new solutions to develop lighter and safer batteries with increased lifetime and range. Borregaard’s solutions can play a crucial role in driving your innovation process toward success by providing both performance and processing benefits.
We help you with
Electrode Properties
Improve electrochemical performance
Improving Slurry Properties
Take control of slurry viscosity
De-agglomeration of CNTs
Unlock the potential of SWCNTs
Optimising Coating Process
Reduce coating defects & scrap rate
Manufacturing and Cost Savings
Faster drying with higher solids content
Frequently asked questions
-
What are the benefits of including lignins in Li-ion batteries?
Lignosulfonates are excellent dispersants for conductive carbon and other carbon-based materials, like graphite, carbon nanotubes, and hard carbons.
By including a small dose of lignosulfonates, typically around 1 wt% of the amount of carbon, improvements can be realized in electrode homogeneity and higher solids loading can be achieved while retaining the proper rheological properties for casting electrodes.
-
Can lignins be added to NMP-based slurries?
At this time, Borregaard only offers lignosulfonates which are water soluble, though a NMP-soluble developmental product is available at small scales for testing as a dispersant for cathode materials and Si.
-
What dose are lignins added to li-ion batteries?
Typical doses are around 1 wt% of the amount of carbon included in the electrode slurry.
A more complete answer is that it will depend on the surface area of the carbon that is used, as well as the dose of the binder and thickener, so one needs to perform a few experiments to find out.
One can usually achieve Newtonian rheological behavior in an aqueous carbon slurry when the lignosulfonate is added at 1 mg for every square meter of carbon surface area. For example, a slurry containing 10 g of carbon with a surface area of 100 m2/g has 1000 m2 carbon surface area and 1 g of lignosulfonate should be added.
As a slurry with Newtonian flow properties is too thin for electrode casting, this dosage provides an upper limit. Progressively lower doses should be pursued until the desired rheological properties are obtained.
-
Do lignins get added instead of the binder or thickener, in battery applications? Or in addition to?
Lignosulfonates can be added in partial replacement of the binder or in addition to. One needs to explore different dosages and compositions to identify the best performance for a particular battery and application.
-
How do lignins get added to the electrode slurry of a lithium-ion battery?
The lignosulfonate should be fully dissolved in the water prior to addition of conductive carbons in order to ensure the best dispersion possible.
Apart from that, the order of addition for other electrode components needs to be investigated for each new formulation to ensure the optimal performance is achieved.