Flow-Through Electrochemical Cell With Porous Electrodes for Dendrite Control
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Solution Overview
Problem
Conventional electrochemical cells face challenges in maintaining efficient ion mobility and preventing dendrite formation during charge and discharge cycles, leading to performance declines and physical damage due to swelling and distortion of electrodes.
Innovation Solution
A flow-through rechargeable electrochemical cell design featuring porous cathodes and anodes with a closed loop system for electrolyte circulation, utilizing a pump to facilitate fluid electrolyte flow through the electrodes, thereby enhancing ion mobility and minimizing dendrite formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional electrochemical cells use static electrolyte, then device complexity is low, but ion mobility is insufficient leading to performance decline
Solution Approach 1:
The patent implements a dynamic electrolyte circulation system where the electrolyte continuously flows through the electrodes during charge and discharge cycles. This dynamic flow regime enhances ion mobility by actively transporting ions through the electrode pores, overcoming the limitations of static electrolyte diffusion and achieving up to 20 times higher ionic mobility.
Solution Approach 2:
The patent employs hydraulic principles by using a pump-driven closed-loop fluid circulation system to move the electrolyte through the electrochemical cell. This hydraulic approach enables controlled electrolyte flow rates and pressures, optimizing ion transport efficiency while managing the added complexity through engineered fluid dynamics.
2Reliability
If conventional electrochemical cells allow electrode swelling and distortion, then manufacturing is simpler, but physical damage and dendrite formation occur
Solution Approach 1:
The patent utilizes porous electrode structures with controlled porosity and interconnected pore networks that can accommodate electrode expansion and contraction during cycling. The porous framework provides mechanical flexibility while maintaining structural integrity, preventing dendrite formation by enabling uniform ion distribution and reducing localized stress concentrations that would otherwise lead to physical damage.
Solution Approach 2:
The patent changes the physical state and flow parameters of the electrolyte to optimize electrode stability. By controlling electrolyte flow rate, pressure, and composition, the system minimizes dendrite formation and electrode degradation, extending cycle life to at least 500 cycles with minimal capacity loss while maintaining manufacturability through parameter optimization rather than complex structural designs.
3Speed
If electrolyte flow rate is increased, then ion mobility improves, but energy consumption increases
Solution Approach 1:
The patent implements continuous electrolyte circulation through the electrodes during charge and discharge operations, ensuring that ion transport is constantly optimized without interruption. This continuous flow regime maintains high ion mobility throughout the electrochemical cell, maximizing reaction efficiency and energy utilization while the system operates within optimal energy consumption parameters through sustained useful action.
Solution Approach 2:
The patent optimizes the flow rate parameter of the electrolyte to achieve the最佳 balance between ion mobility enhancement and energy consumption. By carefully controlling the flow rate within specific ranges, the system achieves up to 20 times higher ionic mobility while the pump energy requirements remain manageable, creating an efficient operating window that maximizes performance per unit energy input.
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 design significantly increases ionic mobility by up to 20 times and extends the cycle life of the cell to at least 500 cycles with minimal capacity loss, reducing physical damage and improving overall performance.
Implementation Method 1
a pump configured to cause the fluid electrolyte to flow through the closed loop, the porous cathode, and the porous anode
Implementation Method 2
The electrolyte conducts the working ion, but is an electronic insulator. As a result, any movement of electrons between the anode working material and the cathode working material must take place through an external circuit
Implementation Method 3
the cathode, the anode, or both may include a high-porosity base material having a porosity between 40% and 99%
Implementation Method 4
During cycling, the electrolyte conducts the working ion inside the electrochemical cell, while electrons to move through the external circuit
Data Source
AI summary
The present disclosure provides a flow-through rechargeable electrochemical cell including a container housing a cathode and an anode; a closed loop fluidly connected to the container; a fluid electrolyte in the container and closed loop and including a working ion; and a pump configured to cause the fluid electrolyte to flow through the closed loop, the porous cathode, and the porous anode in a first direction during discharge of the electrochemical cell. The present disclosure further includes a flow-through rechargeable battery including multiple electrochemical cells, a closed loop, and a pump.