Effect of Boron Addition on the Differential Capacitance of Stress- Annealed Pyrolytic Graphite
Abstract
The non-faradaic differential electrode capacity of the basal plane of boronated stress-annealed pyrolytic graphite with 0.3 weight % boron was studied in aqueous solution using an a.c. impedance bridge and compared to results previously obtained on the non-boronated material. On boronated graphite the potential of the minimum in the capacity-potential curve shifts negative by about 0.5 V relative to that for the non-boronated material. This shift is in agreement with the semiconductor interpretation proposed previously for the capacitance of the basal plane of the non-boronated material. The capacity of the minimum for the boronated material compared favorably with that estimated from the carrier concentration for the space charge region in the electrode phase.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1974
- Accession Number
- AD0777116
Entities
People
- Ernest B. Yeager
- Jean-paul Randin
Organizations
- Case Western Reserve University