Hydrothermal, KOH-assisted synthesis of lignin-derived porous carbon for supercapacitors: value-added of lignin and constructing texture properties/specific capacitance relationships

Abstract Due to the low specific capacitance and small specific surface area of conventional carbon materials used as electrode materials for double-layer capacitors, the search for more ideal materials and ingenious preparation methods remains a major challenge. In this study, fractional porous carbon nanosheets were prepared by co-doping Fe and N with chitosan as nitrogen source. The advantage of this method is that the carbon nanosheets can have a large number of pore structures and produce a large specific surface area. The presence of Fe catalyzes the graphitization of carbon in the carbon layer during carbonization process, and further increases the specific surface area of the electrode material. This structure provides an efficient ion and electron transport pathway, which enables more active sites to participate in the REDOX reaction, thus significantly enhancing the electrochemical performance of SCs. The specific surface area of CS-800 is up to 1587 m2 g−1. When the current density is 0.5 A g−1, the specific capacitance of CS-800 reaches 308.84 F g−1, and remains 84.61 % of the initial value after 10,000 cycles. The Coulomb efficiency of CS-800 is almost 100 % after a long cycle, which indicates that CS-800 has more ideal double-layer capacitance and pseudo capacitance.

Download Full-text

Enteromorpha based porous carbons activated by zinc chloride for supercapacitors with high capacity retention

RSC Advances ◽

10.1039/c4ra13428a ◽

2015 ◽

Vol 5 (21) ◽

pp. 16575-16581 ◽

Cited By ~ 33

Author(s):

Mingbo Wu ◽

Peng Li ◽

Yang Li ◽

Jun Liu ◽

Yang Wang

Keyword(s):

Specific Surface ◽

Specific Capacitance ◽

Surface Area ◽

Specific Surface Area ◽

Zinc Chloride ◽

Porous Carbon ◽

High Capacity ◽

Porous Carbons ◽

Capacity Retention

Porous carbons were prepared from enteromorpha with ZnCl2 as active reagent. The prepared porous carbon with a specific surface area of 1651 m2 g−1 exhibited a specific capacitance of 206 F g−1 and capacity retention of 93% even after 5000 cycles.

Download Full-text

Exothermically Efficient Exfoliation of Biomass Cellulose to Value-Added N-Doped Hierarchical Porous Carbon for Oxygen Reduction Electrocatalyst

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.8b06410 ◽

2019 ◽

Vol 58 (8) ◽

pp. 3047-3059 ◽

Cited By ~ 4

Author(s):

Cheong Kim ◽

Chunyu Zhu ◽

Yoshitaka Aoki ◽

Hiroki Habazaki

Keyword(s):

Oxygen Reduction ◽

Porous Carbon ◽

Value Added ◽

Hierarchical Porous Carbon ◽

Hierarchical Porous

Download Full-text

Digested sludge-derived three-dimensional hierarchical porous carbon for high-performance supercapacitor electrode

Royal Society Open Science ◽

10.1098/rsos.172456 ◽

2018 ◽

Vol 5 (4) ◽

pp. 172456 ◽

Cited By ~ 4

Author(s):

Jia-Jia Zhang ◽

Hao-Xiang Fan ◽

Xiao-Hu Dai ◽

Shi-Jie Yuan

Keyword(s):

Porous Carbon ◽

Carbon Material ◽

High Performance ◽

Three Dimensional ◽

Value Added ◽

Porous Carbon Material ◽

Activation Process ◽

Hierarchical Porous Carbon ◽

Digested Sludge ◽

Hierarchical Porous

Digested sludge, as the main by-product of the sewage sludge anaerobic digestion process, still contains considerable organic compounds. In this protocol, we report a facile method for preparing digested sludge-derived self-doped porous carbon material for high-performance supercapacitor electrodes via a sustainable pyrolysis/activation process. The obtained digested sludge-derived carbon material (HPDSC) exhibits versatile O-, N-doped hierarchical porous framework, high specific surface area (2103.6 m 2 g −1 ) and partial graphitization phase, which can facilitate ion transport, provide more storage sites for electrolyte ions and enhance the conductivity of active electrode materials. The HPDSC-based supercapacitor electrodes show favourable energy storage performance, with a specific capacitance of 245 F g −1 at 1.0 A g −1 in 0.5 M Na 2 SO 4 ; outstanding cycling stability, with 98.4% capacitance retention after 2000 cycles; and good rate performance (211 F g −1 at 11 A g −1 ). This work provides a unique self-doped three-dimensional hierarchical porous carbon material with a favourable charge storage capacity and at the same time finds a high value-added and environment-friendly strategy for disposal and recycling of digested sludge.

Download Full-text

N-doped porous carbon derived from walnut shells with enhanced electrochemical performance for supercapacitor

Functional Materials Letters ◽

10.1142/s1793604719500425 ◽

2019 ◽

Vol 12 (03) ◽

pp. 1950042 ◽

Cited By ~ 7

Author(s):

Yunfeng Wang ◽

Honghui Jiang ◽

Shewen Ye ◽

Jiaming Zhou ◽

Jiahao Chen ◽

...

Keyword(s):

Electrochemical Performance ◽

Specific Capacitance ◽

Porous Carbon ◽

Low Cost ◽

High Specific Capacitance ◽

Cycling Stability ◽

Electrochemical Performances ◽

Walnut Shells ◽

Electrochemical Cycling ◽

Elemental Doping

As the low-cost, natural multi-component for elemental doping and environment-friendly characteristics, biomass-derived porous carbon for energy storage attracts intense attention. Herein, walnut shells-based porous carbon has been obtained through carbonization, hydrothermal and activation treatment. The corresponding porous carbon owns superior electrochemical performances with specific capacitance reaching up to 462[Formula: see text]F[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text], and shows excellent cycling stability (5000 cycles, [Formula: see text]94.2% of capacitance retention at 10[Formula: see text]A[Formula: see text]g[Formula: see text]). Moreover, the symmetry supercapacitor achieves high specific capacitance (197[Formula: see text]F[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text]), relevant electrochemical cycling stability (5000 cycles, 89.2% of capacitance retention at 5[Formula: see text]A[Formula: see text]g[Formula: see text]) and high power/energy density (42.8[Formula: see text]W[Formula: see text]h[Formula: see text]kg[Formula: see text] at 1249[Formula: see text]W[Formula: see text]kg[Formula: see text]). Therefore, the facile synthesis approach and superb electrochemical performance ensure that the walnut shells-derived porous carbon is a promising electrode material candidate for supercapacitors.

Download Full-text

Large and porous carbon sheets derived from water hyacinth for high-performance supercapacitors

RSC Advances ◽

10.1039/c5ra25098f ◽

2016 ◽

Vol 6 (36) ◽

pp. 29996-30003 ◽

Cited By ~ 30

Author(s):

Kai Wu ◽

Biao Gao ◽

Jianjun Su ◽

Xiang Peng ◽

Xuming Zhang ◽

...

Keyword(s):

Specific Surface ◽

Specific Capacitance ◽

Porous Carbon ◽

Water Hyacinth ◽

High Performance ◽

Rate Capability ◽

Cyclic Stability ◽

Water Hyacinths

Large and porous carbon sheets derived from water hyacinths owns high specific surface and desirable microstructures ensuring large specific capacitance, excellent rate capability and superior cyclic stability for high performance supercapacitors.

Download Full-text

Preparation of hierarchically porous carbon nanofoams for electrode materials of supercapacitors

RSC Advances ◽

10.1039/c5ra13235e ◽

2015 ◽

Vol 5 (86) ◽

pp. 70297-70301 ◽

Cited By ~ 5

Author(s):

Yong Zhang ◽

Youfu Wang ◽

Aiguo Hu

Keyword(s):

Specific Capacitance ◽

Porous Carbon ◽

Electrode Materials ◽

Aqueous Electrolyte ◽

Core Shell ◽

Hierarchically Porous

Hierarchically porous carbon nanofoams were prepared via the formation of core–shell organosilica nanoparticles and subsequent Friedel–Crafts chemistry. The specific capacitance of them as electrode materials reached 170 F g−1 in an aqueous electrolyte.

Download Full-text

Synthesis of wood derived nitrogen-doped porous carbon–polyaniline composites for supercapacitor electrode materials

RSC Advances ◽

10.1039/c5ra01949d ◽

2015 ◽

Vol 5 (39) ◽

pp. 30943-30949 ◽

Cited By ~ 48

Author(s):

Shuai Yu ◽

Duo Liu ◽

Shuyan Zhao ◽

Binfu Bao ◽

Chunde Jin ◽

...

Keyword(s):

Energy Density ◽

Specific Capacitance ◽

Porous Carbon ◽

Electrode Materials ◽

Supercapacitor Electrode ◽

Nitrogen Doped ◽

Similar Materials ◽

Polyaniline Composites ◽

Supercapacitor Electrode Materials

Wood derived carbon–polyaniline composites exhibit comparable specific capacitance (347 F g−1) and energy density (44.4 W h kg−1) to similar materials.

Download Full-text