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US 12,221,685 B2Granted
Diamond-like carbon materials and methods of making diamond-like carbon materials
AssigneeCoulombic, Inc.
InventorDavid Andrew Sopchak
Life of this patent
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Abstract
Diamond-like carbon materials and methods of making diamond-like carbon materials are provided. The diamond-like carbon materials are made and tested to specific desirable properties of conductivity and overpotential for undesired reactions. Methods of making the diamond-like carbon include sputtering using a DC magnetron, where the sputtering gas includes argon and nitrogen.
Claims8
A diamond-like carbon material having:
- electrical conductivity such that graphed results of cyclic voltammetry using ruthenium hexaamine cation having a peak separation when extrapolated to a scan rate of zero that is below about 100 millivolts;
- overpotential such that graphed results of cyclic voltammetry using hydroquinone having a peak separation when extrapolated to a scan rate of zero that is greater than about 500 millivolts;
- and
- electrochemical robustness such that for evolution of chlorine in concentrated hydrochloric acid having a concentration of at least about 37%, the diamond-like carbon material is at least about 1000 times more durable than graphite.
1 more element
A method of making diamond-like carbon material, the method comprising steps of:
- placing a graphite target in a DC magnetron located in a vacuum chamber;
- and
- sputtering DLC material from the target onto a substrate using a sputtering gas containing argon and dopant to create a sputtered diamond-like carbon material;
- testing the electrical conductivity of the sputtered diamond-like carbon material by conducting cyclic voltammetry using ruthenium hexaamine cation, and the overpotential of the sputtered diamond-like material by conducting cyclic voltammetry using hydroquinone;
- and
- selecting sputtered diamond-like carbon material having (1) electrical conductivity such cyclic voltammetry using ruthenium hexaamine cation displays a peak separation when extrapolated to a scan rate of zero that is below about 100 millivolts, (2) overpotential such that cyclic voltammetry using hydroquinone displays a peak separation when extrapolated to a scan rate of zero that is greater than about 500 millivolts, and (3) electrochemical robustness such that for evolution of chlorine in concentrated hydrochloric acid having a concentration of at least about 37%, it is at least about 1000 times more durable than graphite.
3 more elements
Dependencies are inferred from the claim text.