Stacked Composite Capacitor With Parallel Nano-Column Capacitors
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Solution Overview
Problem
Existing composite capacitors fail to enhance capacitance density per unit area and overall electrostatic capacity when stacked, as they are connected in series rather than parallel, limiting their performance.
Innovation Solution
A composite capacitor design where multiple capacitors are stacked with an insulating section covering their peripheral surfaces, each comprising a support electrode layer, nano-sized columnar conductors, a dielectric layer, and a counter electrode layer, with capacitors connected in parallel to increase capacitance density and electrostatic capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If capacitors are stacked in series to increase electrostatic capacity, then the overall voltage handling increases, but the capacitance density per unit area as viewed from the stacking direction does not enhance
Solution Approach 1:
The capacitor structure is segmented into multiple unit capacitors stacked in the vertical direction. Each unit capacitor consists of columnar conductors extending from a support electrode layer through a dielectric layer to a counter electrode layer. This segmentation allows independent electrical connection configurations
Solution Approach 2:
The invention transitions from planar capacitor arrangement to three-dimensional stacked configuration. By stacking multiple unit capacitors vertically and connecting them in parallel through conductive connections between corresponding electrode layers, the capacitance density per unit area as viewed from the stacking direction is enhanced while maintaining compact form factor
2Quantity of substance
If the capacitor structure is enlarged in the arranging direction of columnar conductors to increase electrostatic capacity, then the total capacitance increases, but the capacitance density per unit area as viewed from the extending direction of columnar conductors is not enhanced
Solution Approach 1:
Multiple unit capacitors are nested vertically in the stacking direction, with each unit containing columnar conductors that extend through dielectric layers. The columnar conductors of upper units are positioned above and electrically connected to the counter electrode layers of lower units, creating a nested configuration that increases capacitance without increasing the horizontal footprint
Solution Approach 2:
The capacitor employs composite structural elements including columnar conductors (such as carbon nanotubes) with high aspect ratios, combined with dielectric layers and conductive materials. This composite approach enables high capacitance density by utilizing the unique properties of nanoscale columnar structures that provide large surface area for charge storage within a compact volume
Data Source
AI summary
A composite capacitor that includes a plurality of capacitors and an insulating section. The plurality of capacitors are stacked on each other. The insulating section covers peripheral surfaces of the plurality of capacitors about a central axis of the plurality of capacitors, the stacking direction of the plurality of capacitors being a direction of the central axis. Each of the plurality of capacitors includes a support electrode layer, plural columnar conductors, a dielectric layer, and a counter electrode layer. Each of the plural columnar conductors has a nano-size outer diameter. The plurality of capacitors include a first capacitor and a second capacitor connected in parallel with the first capacitor.