Printed Biocompatible Battery With Binder-Free Mesoporous Cathode
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Solution Overview
Problem
Lithium-ion batteries face challenges with low electrical conductivity, high irreversible capacity, and mechanical integrity issues due to the use of binders in carbon-based electrode materials, leading to decreased cycle life and performance in portable electronic devices.
Innovation Solution
A point-of-use battery system featuring 3D printed scaffolded mesoporous carbon-based materials with open porous structures and fractal-like arrangements, using biocompatible materials and a non-toxic aqueous electrolyte, which transitions to an active state upon folding or peel-back action, enhancing ion transport and structural integrity without traditional binders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional binders are used in carbon-based electrode materials, then mechanical integrity is improved, but electrical conductivity decreases and cycle life is reduced
Solution Approach 1:
The patent removes traditional binder materials from the electrode structure and replaces them with a self-supporting 3D printed scaffold made of conductive carbon-based materials. This extraction of the binder component eliminates the electrical resistance it introduces while maintaining mechanical integrity through the scaffold's geometric design and inherent structural strength.
Solution Approach 2:
The patent changes the fundamental parameter of electrode construction from a binder-dependent composite structure to a binder-free scaffold structure. The scaffold's porosity, strand thickness, and geometric configuration are optimized to provide both mechanical support and electrical conductivity, representing a parameter change that resolves the contradiction between strength and reliability.
2Strength
If traditional binders are used in carbon-based electrode materials, then mechanical integrity is improved, but electrical conductivity decreases
Solution Approach 1:
The patent extracts and removes the binder component from the electrode, eliminating the electrical resistance it creates. The resulting binder-free scaffold structure uses only conductive carbon-based materials, ensuring optimal electrical conductivity while the scaffold's geometric design maintains necessary mechanical integrity.
Solution Approach 2:
The patent employs composite carbon-based materials with varying degrees of graphitization and conductivity within the scaffold structure. This composite approach allows optimization of both mechanical properties and electrical conductivity by combining different carbon material characteristics in a single integrated structure.
3Reliability
If 3D printed scaffolded mesoporous carbon-based materials are used, then ion transport is enhanced and structural integrity is maintained, but device complexity increases
Solution Approach 1:
The patent segments the electrode into a modular 3D printed scaffold with repeating geometric patterns and mesoporous structures. This segmentation creates a standardized, manufacturable design that enhances ion transport through the porous structure while maintaining structural integrity. The modular nature of the segmentation also simplifies the manufacturing process despite the complex geometry.
Solution Approach 2:
The patent utilizes porous carbon-based scaffold materials with controlled mesoporous structures that facilitate ion transport. The porosity is engineered through the 3D printing process to create optimal pathways for ion diffusion while maintaining mechanical strength. This approach enhances reliability through improved electrochemical performance without requiring overly complex external structures.
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 solution improves the electrical conductivity and cycle life of lithium-ion batteries by providing a stable, non-toxic, and biocompatible battery system that maintains structural integrity and enhances ion transport, suitable for portable electronic devices and sensor applications.
Implementation Method 1
a non-toxic aqueous electrolyte, which transitions to an active state upon folding or peel-back action, enhancing ion transport
Implementation Method 2
a 3D hierarchical mesoporous carbon-based cathode having an open porous structure for gas diffusion with areas to catalyze active material reduction comprising oxygen (O2) and other gaseous species, the reduced oxygen creating water upon exposure to ambient air
Implementation Method 3
A point-of-use battery system that transitions to an active state from a dormant state based on a folding or peel-back action
Data Source
AI summary
A battery-powered analyte sensing system includes a printed battery and an analyte sensor. The printed battery includes an anode composed of a non-toxic biocompatible metal, a first carbon-based current collector in electrical contact with the anode, a three-dimensional hierarchical mesoporous carbon-based cathode, a second carbon-based current collector, and an electrolyte layer disposed between the anode and the cathode, the electrolyte layer configured to activate the printed battery when the electrolyte is released into one or both the anode and the cathode. The analyte sensor includes a sensing material and a reactive chemistry additive in the sensing material.