Pyrene Tetraone Electrode Material for High Energy Density Batteries
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Solution Overview
Problem
Quinone organic compounds used in electricity storage devices have a lower discharge voltage and poor charging and discharging cycle characteristics, limiting the substantial energy density and efficiency of these devices.
Innovation Solution
An electrode active material with a pyrene ring and two pairs of ketone groups in the ortho position, optionally substituted with halogen atoms, phenyl groups, or heterocyclic groups, is used to enhance energy density and reduce solubility in electrolytes, improving cycle characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If quinone organic compounds are used as electrode active materials, then heavy metal pollution is reduced and energy density is improved, but discharge voltage becomes much lower than conventional inorganic oxide batteries
Solution Approach 1:
The patent introduces substituents (R1-R6) with specific electrical properties onto the pyrene core structure. These substituents modify the electron distribution and HOMO-LUMO energy levels of the organic compound, thereby adjusting the discharge voltage to be closer to conventional batteries while maintaining the organic material advantages.
Solution Approach 2:
The patent creates a composite structure by combining the pyrene core with various functional groups and substituents. This composite approach allows optimization of both the voltage characteristics (through electronic structure modification) and the solubility properties (through steric and chemical modifications), resolving the contradiction between voltage and cycle life.
2Weight of moving object
If quinone organic compounds are used as electrode active materials, then specific gravity is reduced and energy density is improved, but charging and discharging cycle characteristics become poor
Solution Approach 1:
The patent modifies molecular weight and steric parameters by introducing bulky substituents (phenyl groups, heterocyclic groups, halogen atoms) onto the pyrene core. These parameter changes reduce solubility in electrolyte while maintaining electrochemical activity, thereby improving cycle characteristics without sacrificing the low specific gravity advantage.
Solution Approach 2:
The patent designs organic compounds that resist dissolution and degradation, effectively creating a durable electrode material that maintains its structural integrity over many charge-discharge cycles, transforming the previously short-lived organic electrode into a reliable long-term solution.
3Use of energy by moving object
If pyrene-4,5,9,10-tetraone is used as electrode active material, then high energy density and discharge potential are achieved, but solubility in electrolyte increases and cycle characteristics deteriorate
Solution Approach 1:
The patent systematically varies parameters such as substituent type (halogen, phenyl, heterocyclic), substituent position, and molecular size to optimize the balance between solubility and electrochemical performance. The core pyrene-tetraone structure is preserved for high energy density, while substituents are added to control solubility and improve cycle life.
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 electrode active material achieves high energy density and discharge potential while mitigating the risks of heavy metal resource exhaustion and environmental pollution, with improved charging and discharging cycle performance and reduced weight due to lower specific gravity.
Implementation Method 1
an organic compound capable of causing reversibly an oxidation-reduction reaction is proposed
Data Source
AI summary
The present invention provides an electrode active material for an electricity storage device, having a structure represented by following formula (1). In the formula (1), R1 to R6 each denote independently a hydrogen atom (except for a case where all of R1 to R6 denote hydrogen atoms), a halogen atom, an optionally substituted phenyl group, an optionally substituted heterocyclic group, or an optionally substituted hydrocarbon group having 1 to 4 carbon atoms.