Camphor Solid Electrolyte for Stable Lithium-Ion Batteries
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Solution Overview
Problem
Existing solid-state lithium-ion batteries face challenges with low ion mobility and mechanical instability of solid electrolytes across a wide temperature range, limiting their ionic conductivity and operational safety.
Innovation Solution
The use of camphor (C10H16O) or 2-adamantanone (C10H14O) as a solid matrix for the electrolyte, which offers improved thermomechanical properties, enabling stable ionic conductivity and mechanical stability from -20°C to 60°C, and allowing for the production of dense, non-porous electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional solid electrolytes (PEO, SN) are used, then ionic conductivity can be achieved, but mechanical stability deteriorates across a wide temperature range
Solution Approach 1:
The patent uses a composite material system consisting of camphor or 2-adamantanone as the solid matrix combined with lithium salts (such as LiTFSI, LiBF4, LiPF6) to form the electrolyte. This composite approach allows the organic matrix to provide mechanical stability while the lithium salt complexes provide ionic conductivity, resolving the contradiction between mechanical stability and ionic conductivity across wide temperature ranges.
Solution Approach 2:
The patent changes the chemical composition parameters by selecting specific organic compounds (camphor or 2-adamantanone) with appropriate melting points and molecular structures. These parameter changes enable the electrolyte to maintain adequate mechanical stability while achieving sufficient ionic conductivity at room temperature and across extended temperature ranges.
2Object-affected harmful factors
If solid electrolytes are used to improve safety, then flammability is reduced, but ion mobility deteriorates
Solution Approach 1:
The patent changes the physical and chemical parameters of the solid electrolyte by using organic compounds with specific molecular structures and low glass transition temperatures. This allows the material to maintain safety characteristics of solid electrolytes (non-flammable) while achieving ion mobilities comparable to liquid electrolytes through careful selection of camphor or 2-adamantanone as the matrix.
3Quantity of substance
If conventional solid electrolytes are used, then energy density can be improved, but operational temperature range deteriorates
Solution Approach 1:
The patent adjusts the thermal parameters of the electrolyte system by selecting organic compounds with appropriate melting points and thermal stability. The use of camphor (melting point 179°C) or 2-adamantanone (melting point 270°C) as matrices, combined with lithium salts, enables the battery to operate efficiently across an extended temperature range from -20°C to 60°C while maintaining high energy density.
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 solution provides solid-state lithium-ion batteries with enhanced ionic conductivity and mechanical stability across a significant temperature range, improving safety and efficiency compared to previous materials like PEO and SN, enabling operation at room temperature and high energy density.
Implementation Method 1
an ion-conductive solid matrix for forming a solid electrolyte... high lithium-ion conductivities
Implementation Method 2
a critical consideration for the development of solid-state lithium-ion batteries is the provision of suitable solid electrolytes... retain adequate mechanical stability across a wide temperature range
Data Source
AI summary
The present invention relates to a solid-state battery, particularly a lithium-ion solid-state battery, composed of one or more battery cells, which have an ion-conducting solid matrix (2) as solid electrolyte, which matrix is embedded between two electrodes (1, 3). The proposed solid-state battery is characterized in that the solid matrix (2) is formed form camphor, 2-adamantanone or a mixture of one of the two with one or more other substances. Owing to the use of camphor or 2-adamantanone, the solid electrolyte is mechanically stable and has good ionic conductivity in a wide temperature range.