HBCN Anode Architecture for Higher-Capacity Sodium-Ion Batteries
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Solution Overview
Problem
Existing sodium-ion batteries face challenges with low stability, high reactivity, and low energy density, and carbon-based anodes have limited commercial application due to low theoretical specific capacity and lack of effective heteroatom doping combinations.
Innovation Solution
A sodium-ion battery design incorporating a 3D honeycomb boron carbon nitride (HBCN) anode with combined nitrogen and boron doping, along with a Na3V2(PO4)2F3 cathode, electrolyte, and separator, optimized for porosity and surface area, enhances charge transfer and ion diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If carbon-based anode materials are used in sodium-ion batteries, then robust architectural stability and superior electrochemical behaviour are achieved, but low theoretical specific capacity limits energy density
Solution Approach 1:
The patent changes the chemical composition parameters of the anode material by incorporating heteroatoms (Boron, Nitrogen, Phosphorous, Sulphur, Fluorine) into the carbon matrix. This doping approach modifies the electronic structure and surface properties of the carbon material, enabling higher sodium ion capacity while maintaining the robust architectural stability of the carbon framework.
Solution Approach 2:
The patent creates composite anode materials by combining carbon-based structures with heteroatom-doped phases. The composite nature allows the material to benefit from both the structural stability of carbon and the enhanced electrochemical properties of heteroatom-doped regions, achieving high specific capacity without sacrificing architectural integrity.
2Reliability
If heteroatom doping is applied to carbon matrix, then surface properties and Na diffusion are improved, but lack of effective heteroatom combination limits battery performance
Solution Approach 1:
The patent merges multiple heteroatoms (Boron, Nitrogen, Phosphorous, Sulphur, Fluorine) into a single carbon matrix structure to create multi-doped composite materials. This combination approach allows synergistic effects where different heteroatoms contribute complementary properties: Boron and Nitrogen enhance electronic structure and charge transfer, while Phosphorous, Sulphur, and Fluorine modify surface chemistry and ion diffusion pathways, achieving superior overall electrochemical performance.
Solution Approach 2:
The patent applies different heteroatom dopants at specific locations and concentrations within the carbon matrix to optimize local properties. By controlling the spatial distribution and concentration of each heteroatom type, the material achieves optimized electronic structure in certain regions for charge transfer while other regions provide enhanced surface chemistry for ion diffusion, creating locally optimized zones that collectively improve battery performance.
3Ease of manufacture
If conventional carbon anodes are used, then low cost and ease of manufacture are achieved, but low energy density prevents commercial application
Solution Approach 1:
The patent modifies the chemical composition parameters of conventional carbon anodes through heteroatom doping, transforming them into high-capacity materials. The doping process can be integrated into existing carbonization processes, maintaining manufacturing simplicity while dramatically improving energy density by enabling higher sodium ion capacity through modified electronic and surface properties.
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 HBCN anode achieves high doping efficiency, improving the electrochemical performance of sodium-ion batteries with enhanced capacity and stability, particularly in full-cell configurations.
Implementation Method 1
mesoporous honeycomb boron carbon nitride nanomaterial plated/deposited with sodium as anode
Implementation Method 2
Combined effects of heteroatom doping with porous carbon architecture provided excellent charge transfer, ion diffusion properties of the doped surface
Data Source
AI summary
The present invention relates to Na-ion batteries comprising honey comb boron carbon nitride (HBCN) as an anode. More particularly, the present invention relates to half-cell and full cell Na-ion batteries comprising honey comb boron carbon nitride (HBCN) nanomaterial as an anode.