Table 2 Comparison of capacitive performances for various carbon materials synthesized from waste biomass.

From: Large area few-layer graphene with scalable preparation from waste biomass for high-performance supercapacitor

Sl. No.

Waste Source

Product morphology

BET Surface area (m2/g)

Electrolyte

Potential window

Energy density (W h/ kg)

Power density (kW/Kg)

References

1

Coconut Shell

Sheet-like graphitic carbon

1874

6 M KOH

−1.1-(−0.2 V)

9.58

10

12

2

Wood sawdust

Activated carbon fiber

2294

6 M KOH

0–1 V

7.8

5

78

3

Fish scale

Hierarchical lamellar porous carbon

2273

—

0–1 V

—

—

74

4

Dried Distillers Grains

Porous activated carbon

1021

6 M KOH

−1–0 V

30.14

2.5

75

5

Waste coffee beans

Nanoporous carbon

1840

1 M H2SO4

0–1 V

20

6

76

6

Sugarcane bagasse

Activated carbon

1788

1 M H2SO4

0–1 V

10

10

77

7

Rice husk

Microporous carbon

1442

6 M KOH

−0.5–0.5 V

8.36

—

48

8

Dead neem leaves

Microporous carbon

1230

1 M H2SO4

0–1 V

55.5

11.685

21

9

Peanut shell

Mesoporous carbon

1527

6 M KOH

−0.5–0.5 V

6.68

—

46

10

Peanut shell

Few-layer graphene

2070

1 M H 2 SO 4

−0.4–1.1 V

58.25

37.5

This work

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