This approach is differentiated by its direct integration of nano-structures onto the current collector, eliminating binder and conductive additive requirements and reducing interfacial resistance. Precisely spaced nanoparticles prevent agglomeration and pulverization, while tunable Si/C ratios enable optimization of capacity versus stability. Doping and conformal surface layers strengthen interfacial adhesion, suppress solid–electrolyte interphase growth, and enhance ion transport. Together, these features address common failure modes of high-capacity anodes and enable prolonged cycling with minimal capacity fade.
Description
A nano-engineered electrode employs a rigid, conductive support matrix of vertically aligned nanotubes, nanowires or nanorods grown directly on a current-collector substrate, onto which metallic or non-metallic nanoparticles—typically ~40 nm silicon—are deposited at controlled intervals. A two-step low-pressure CVD process first synthesizes multiwalled carbon nanotubes on an Inconel alloy, then deposits silicon from silane gas, with reaction times adjusted to set the Si/C ratio. The architecture accommodates large volume changes during lithiation, provides continuous electron and ion pathways, and anchors the nanoparticles via strong interfacial bonds. Optional dopants (N, B, P, S, Se) or surface coatings (carbon, oxides, nitrides, metals) further enhance mechanical integrity and cycle life, delivering stable reversible capacities ≥1000 mAh/g.
Applications
Electric vehicle battery anodes
Grid storage battery systems
Consumer electronics batteries
High-power tool batteries
Unmanned aerial vehicle batteries
Advantages
High reversible capacity (≥1000 mAh/g)
Stable cycling performance over many charge/discharge cycles
Flexible matrix accommodates silicon volume expansion
Rapid electron and lithium-ion transport pathways
Strong interfacial bonding for mechanical integrity
Controlled nanoparticle spacing prevents agglomeration
Tunable electrochemical behavior via Si/C ratio and dopants
Scalable fabrication using low-pressure CVD processes
IP Status
https://patents.google.com/patent/US10878977B2
