Biomass-Derived Furan Precursor for Synthetic Graphite
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The current synthetic graphite production for lithium-ion batteries is constrained by harsh chemical processing, high impurity levels, and environmental pollution, particularly due to the use of coke- and pitch-based precursors, which limits the availability and purity of battery-grade graphite.
Innovation Solution
A method is developed to produce battery-grade graphite using furan compounds derived from biomass as precursors, involving polymerization, carbonization, and graphitization at lower temperatures with reduced energy intensity and pollution, achieving higher purity and yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If coke- and pitch-based precursors are used for synthetic graphite production, then graphite can be manufactured, but high impurity levels and environmental pollution occur
Solution Approach 1:
The invention changes the chemical composition parameters of the precursor material from conventional coke- and pitch-based precursors to furfuryl alcohol, a biomass-derived compound. This parameter change fundamentally alters the chemical processing requirements, enabling production at lower temperatures (below 3000°C) and reducing harmful emissions while maintaining graphite production quality
Solution Approach 2:
The invention uses furfuryl alcohol, a readily available and inexpensive biomass-derived precursor, replacing expensive and environmentally problematic coke- and pitch-based precursors. This substitution achieves cost-effective graphite production with reduced environmental impact
2Quantity of substance
If conventional carbonization and graphitization processes are used, then graphite is produced, but high energy consumption occurs
Solution Approach 1:
The invention changes the thermal processing parameters by using furfuryl alcohol as precursor, which allows carbonization and graphitization to proceed at significantly lower temperatures (below 3000°C) compared to conventional methods. This parameter change directly reduces the energy input required for graphite production while maintaining product quality
3Manufacturing precision
If harsh chemical processing is applied to remove impurities, then graphite purity is improved, but production cost and environmental impact increase
Solution Approach 1:
The invention performs preliminary purification by selecting furfuryl alcohol as the precursor material, which inherently contains fewer impurities compared to conventional precursors. This preliminary action eliminates the need for harsh chemical processing steps during manufacturing, reducing both production complexity and environmental impact while achieving high graphite purity
Solution Approach 2:
The invention uses furfuryl alcohol, a cheap and readily available biomass-derived precursor, replacing expensive conventional precursors that require complex purification. This substitution achieves cost-effective production with simplified manufacturing processes and reduced environmental burden
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 approach results in graphite with lower impurity levels and improved electrochemical performance, reducing production costs and environmental impact while providing a renewable and sustainable source for lithium-ion batteries.
Implementation Method 1
polymerizing the mixture of furan-ring compounds, additives and catalyst into a solid polymer
Implementation Method 2
heating the solid polymer up to a temperature of 1500° C. to form a carbonized solid
Implementation Method 3
heating the carbonized solid up to a temperature of 3000° C. to re-arrange the disordered structure of the hard carbon into the ordered hexagonal structure of graphite
Data Source
AI summary
A method for producing high-purity synthetic graphitized carbonaceous materials with impurity levels below 100 ppm, derived from plant-based biomass extracts. The method involves mixing furan-ring containing precursor compounds with polymerization catalysts and additives, followed by polymerizing the mixture at temperatures between 20° C. and 200° C. The solid polymers are carbonized and graphitized using heat treatments up to 1500° C. and 3000° C., respectively. Besides disclosing the specifics of the process, typical materials characteristics (X-ray diffraction, Raman spectroscopy, specific surface area, impurity content and electrochemical test data) of the synthesized graphite are also disclosed. Details of the additives used to control the reaction, to add electrochemical performance to the graphite, and to catalyze the graphitization reaction, are presented.