Boron Compound Electrolyte for Secondary Battery Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current secondary batteries face challenges in achieving superior battery characteristics, particularly in terms of chemical stability and discharge capacity, especially with frequent charge and discharge cycles, due to decomposition reactions during charge and discharge reactions.
Innovation Solution
Incorporating a boron compound with six or more boron atoms, including an octavalent boron-hydrogen-containing structure and a dodecavalent boron-carbon-containing structure, into the non-aqueous electrolytic solution to enhance the chemical stability and suppress decomposition reactions, thereby maintaining high discharge capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional electrolyte composition is used, then battery capacity can be achieved, but chemical stability deteriorates during frequent charge and discharge cycles
Solution Approach 1:
The patent changes the chemical parameters of the electrolyte by introducing a specific boron compound (B10H14) with defined molecular structure and properties. This compound is added at a controlled concentration range (0.01-1.5 wt%) to modify the electrolyte's chemical stability without significantly altering its ion conductivity or battery capacity
Solution Approach 2:
The patent creates a composite electrolyte system by combining conventional electrolyte components (lithium salt, cyclic carbonate, chain carbonate) with the boron compound B10H14. This composite formulation synergistically maintains high battery capacity while improving chemical stability during charge-discharge cycles
2Ease of operation
If conventional electrolyte composition is used, then battery operation can be maintained, but decomposition reactions increase during charge and discharge
Solution Approach 1:
The boron compound B10H14 acts as an intermediary substance in the electrolyte that mediates between the electrodes and the electrolyte components. It forms protective interface layers that prevent direct contact and harmful decomposition reactions between the electrolyte and electrode materials during charge and discharge operations
Solution Approach 2:
The patent converts the potential harmful effect of electrolyte decomposition into a beneficial protective mechanism. The boron compound preferentially undergoes controlled reactions to form stable protective films on electrode surfaces, preventing more severe decomposition of the main electrolyte components
Data Source
AI summary
A secondary battery includes a cathode, an anode, and non-aqueous electrolytic solution. The non-aqueous electrolytic solution includes a boron compound. The boron compound includes six or more boron (B) atoms, and includes an octavalent boron-hydrogen-containing structure represented by Formula (1), a dodecavalent boron-carbon-containing structure represented by Formula (2), or both.