Siloxane-Modified Electrolyte for Low-Temperature Battery Discharge
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Solution Overview
Problem
Lithium ion secondary batteries face unsatisfactory discharge characteristics in low-temperature environments and high-output conditions, particularly in terms of energy delivery within short durations.
Innovation Solution
A non-aqueous electrolytic solution comprising a siloxane modified with an ether bond-bearing organic group is used, enhancing lithium ion migration between electrodes, which improves discharge characteristics at both low temperatures and high outputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrolytic solutions are used in lithium ion secondary batteries, then the batteries can operate with high energy density, but the discharge characteristics deteriorate in low-temperature environments and at high output levels
Solution Approach 1:
The patent modifies the chemical structure of the electrolyte by introducing ether bond-bearing organic groups to the siloxane molecule. This parameter change in molecular structure improves lithium ion solvation and mobility, enabling the battery to maintain reliable discharge characteristics across a wider temperature range including low-temperature environments.
Solution Approach 2:
The patent uses a composite electrolyte system combining siloxane backbone with ether bond-bearing organic groups. This composite molecular structure leverages the benefits of both siloxane (stability) and ether groups (ion conductivity), resolving the contradiction between energy density and low-temperature discharge characteristics.
2Productivity
If conventional electrolytic solutions are used, then the battery structure remains simple, but the discharge capacity at high output levels requiring large quantity of electricity within short duration is insufficient
Solution Approach 1:
The ether bond-bearing organic groups in the siloxane electrolyte modify the electrical parameters of the solution, increasing ionic conductivity and reducing resistance. This enables the battery to deliver large quantities of electricity within short durations, improving high-output discharge capacity without sacrificing structural simplicity.
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 use of the siloxane-modified electrolyte solution in lithium ion batteries significantly enhances temperature and high-output performance, extending cycle life and maintaining discharge capacity in challenging conditions.
Implementation Method 1
lithium ion secondary battery capable of charge/discharge operation by migration of lithium ions between positive and negative electrodes
Data Source
AI summary
A non-aqueous electrolytic solution is provided comprising a non-aqueous solvent, an electrolyte salt, and a siloxane modified with ether bond-bearing organic group. A non-aqueous electrolyte secondary battery using the same has improved characteristics both at low temperatures and at high outputs.