All-Solid-State Battery Gas Removal and Electrolyte Hardening
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current all-solid-state lithium secondary batteries face challenges in efficiently removing gases generated during the activation process, leading to interrupted lithium ion movement, reduced battery performance, and safety concerns due to combustible organic solvents, with non-uniform solid electrolyte formation and increased interfacial resistance.
Innovation Solution
A manufacturing method involving the interposition of a solid polymer electrolyte between the cathode and anode, followed by hardening with pressure and heat, and repeated activation and gas removal cycles to form a uniform electrolyte layer, minimizing bubbles and dead areas, and enhancing ion conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If gas removal outlets are provided in battery cells to remove gas generated during activation, then gas removal efficiency is improved, but device complexity increases due to additional components and sealing requirements
Solution Approach 1:
The patent extracts the gas removal function from the battery cell structure by providing dedicated gas removal outlets that allow gas to be vented from the battery cell during activation. This separates the gas removal function from the sealed battery structure, enabling effective gas removal without compromising the integrity of the battery cell components.
Solution Approach 2:
The patent introduces a gas removal outlet as an intermediary component that mediates between the gas generated during activation and the external environment. This intermediary structure allows controlled gas removal while maintaining the sealed nature of the battery cell, thus resolving the contradiction between gas removal efficiency and device complexity.
2Reliability
If polymer electrolyte is interposed between cathode and anode, then ion conductivity is improved, but manufacturing precision deteriorates due to non-uniform solidification and bubble formation
Solution Approach 1:
The patent applies preliminary action by providing gas removal outlets before the activation process begins. This allows gas to be removed during activation, preventing bubble formation and non-uniform solidification of the polymer electrolyte. By preparing the gas removal pathway in advance, the patent ensures uniform electrolyte formation and maintains manufacturing precision while achieving high ion conductivity.
3Reliability
If activation process is performed to stabilize battery structure, then reliability is improved, but harmful factors increase due to gas generation from side reactions
Solution Approach 1:
The patent converts the harmful effect of gas generation during activation into a beneficial outcome by providing gas removal outlets. The gas that would otherwise cause swelling and performance degradation is now channeled through the outlets and removed from the battery cell. This allows the activation process to proceed fully, stabilizing the battery structure, while the harmful gas is systematically eliminated.
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
This method results in a high-capacity, stable all-solid-state lithium secondary battery with improved ion conductivity and reduced interfacial resistance, addressing performance and safety issues by forming a uniform electrolyte layer and stabilizing the battery structure.
Implementation Method 1
hardening the polymer electrolyte by applying a pressure and heat to the all-solid-state lithium secondary battery
Implementation Method 2
hardening the polymer electrolyte by applying a pressure and heat to the all-solid-state lithium secondary battery
Implementation Method 3
hardening the polymer electrolyte by applying a pressure and heat to the all-solid-state lithium secondary battery
Data Source
AI summary
The disclosure relates a to manufacturing method of an all-solid-state lithium secondary battery including a solid polymer electrolyte, including preparing an all-solid-state lithium secondary battery by interposing a polymer electrolyte between a cathode and an anode; hardening the polymer electrolyte by applying a pressure and heat to the all-solid-state lithium secondary battery; activating the all-solid-state lithium secondary battery by applying a current; and removing a gas generated in the activated all-solid-state lithium secondary battery. By hardening a polymer electrolyte interposed between a cathode and an anode through applying a pressure and heat, a bubble or dead area inside solid polymer electrolyte is minimized with providing an electrode having uniform thickness. By repeating activation operation and removing gas, bonding of electrode stack is more enhanced, and stability of a battery is improved.