Table 2 g-factors, integrated area of EPR signal, and the accurate defect concentration of carbon-based starting materials and B4C samples synthesized via various conditions.

From: Defect-induced B4C electrodes for high energy density supercapacitor devices

 

g-factor (isotropic)

Integrated area

Defect concentration (spins/g)

Active C

2.0031

1.23 × 102

2.15 × 1017

Graphite

2.0098

2.82 × 102

4.93 × 1017

S1@G3

2.0023

4.81 × 103

8.41 × 1018

S2@G6

2.0031

2.52 × 103

4.41 × 1018

S3@A3

2.0025

5.36 × 101

9.38 × 1016

S4@A6

2.0027

4 × 103

7 × 1018