Maleimide-Modified Additive for Lithium Ion Battery Anode Paste
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Solution Overview
Problem
Lithium ion batteries face issues with increased resistance and reduced capacitance due to sedimentation in anode paste compositions, leading to unnecessary power consumption and compromised cycle life.
Innovation Solution
An additive formulation combining an ionic conductor with a maleimide structure modified by a barbituric acid structure, specifically in the form of LixMyTiz(PO4)3, is used to enhance the compatibility and conductivity of the electrode paste, reducing resistance and improving lithium ion conduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If maleimide modified with barbituric acid is used to increase compatibility with solvent in electrode paste, then sedimentation is reduced, but resistance increases causing power consumption and capacitance reduction
Solution Approach 1:
The patent uses a composite material consisting of maleimide modified with barbituric acid combined with an ionic conductor (LixMyTiz(PO4)3). This composite approach allows the maleimide to provide compatibility with the PVDF solvent while the ionic conductor component addresses the resistance issue, achieving both low resistance and high capacitance simultaneously
Solution Approach 2:
The patent changes the chemical structure parameters by introducing specific ionic conductor compounds (LixMyTiz(PO4)3 where M is Al, Fe, or Cr) into the electrode paste formulation. This parameter change modifies the electrical properties of the paste, reducing resistance while maintaining the compatibility benefits of the barbituric acid-modified maleimide
2Quantity of substance
If high density lithium cobalt oxide is used as anode active material, then energy density is improved, but sedimentation occurs easily in anode paste composition
Solution Approach 1:
The patent introduces barbituric acid-modified maleimide as an intermediary substance that mediates between the high density lithium cobalt oxide particles and the PVDF solvent. This intermediary improves the wettability and dispersion of the dense oxide particles, preventing sedimentation while maintaining high energy density
Solution Approach 2:
The electrode paste uses a composite formulation combining high density lithium cobalt oxide with barbituric acid-modified maleimide and ionic conductor. This composite structure allows the dense active material to be evenly distributed and stabilized in the paste matrix, preventing sedimentation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The formulation results in lithium ion batteries with low resistance, high capacitance, and excellent cycle life, avoiding excessive power consumption and ensuring safety, thereby enhancing operational efficiency and longevity.
Implementation Method 1
an ionic conductor having a structure of Formula (I)... LixMyTiz(PO4)3... can reduce the resistance of a battery
Implementation Method 2
a compound having a maleimide structure modified by a compound having a barbituric acid structure... increase its compatibility with the solvent in the electrode paste
Data Source
AI summary
An additive formulation for a lithium ion battery is provided, which includes an ionic conductor and a compound having a maleimide structure. An electrode slurry composition is also provided, which includes an active material, a conductive additive, an adhesive, and an additive formulation containing an ionic conductor and a compound having a maleimide structure modified by a compound having a barbituric acid structure.