Simple pyrolysis of alginate-based hydrogel cross-linked by bivalent ions into highly porous carbons for energy storage
Copyright © 2020. Published by Elsevier B.V..
Searching for a sustainable precursor that is capable of absorbing microwave energy is crucial for its rapid conversion into porous carbon via microwave heating. Here, alginate-based hydrogel beads cross-linked by bivalent ions (Cu2+, Zn2+, and Ca2+) are converted into porous carbons (SPCs) in 10 min by applying simple microwave-assisted pyrolysis. Water wrapped in hydrogel beads and bivalent ions serve as initial microwave absorbers to convert alginate into char which acts as a good microwave absorber in the following stages. Additionally, bivalent ions also act as a gelling agent to generate hydrogel beads, as a porogen to obtain a highly porous structure, and as a metal donor to form the SPC/Cu composite. The resultant SPC has a high specific surface area of 1336 m2 g-1, a large total pore volume of 0.56 cm3 g-1, interconnected macropores, as well as a high oxygen content of up to 13.2%. These attractive characteristics give SPC a remarkable rate capability of 72% at 50 A g-1. Interestingly, the interconnected macropores in SPC offer sufficient space for Cu growth via the redox reactions of Cu2+; thus, the SPC/Cu composite without acid wash shows a specific capacitance as high as 804 F g-1 at 0.5 A g-1.
| Medienart: |
E-Artikel |
|---|
| Erscheinungsjahr: |
2020 |
|---|---|
| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:158 |
|---|---|
| Enthalten in: |
International journal of biological macromolecules - 158(2020) vom: 05. Mai, Seite 265-274 |
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
Chen, Weimin [VerfasserIn] |
|---|
| Links: |
|---|
| Themen: |
|---|
| Anmerkungen: |
Date Revised 27.02.2024 published: Print-Electronic Citation Status Publisher |
|---|
| doi: |
10.1016/j.ijbiomac.2020.04.123 |
|---|
| funding: |
|
|---|---|
| Förderinstitution / Projekttitel: |
|
| PPN (Katalog-ID): |
NLM309633788 |
|---|
| LEADER | 01000caa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM309633788 | ||
| 003 | DE-627 | ||
| 005 | 20240229162835.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 231225s2020 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1016/j.ijbiomac.2020.04.123 |2 doi | |
| 028 | 5 | 2 | |a pubmed24n1308.xml |
| 035 | |a (DE-627)NLM309633788 | ||
| 035 | |a (NLM)32380099 | ||
| 035 | |a (PII)S0141-8130(20)32979-2 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Chen, Weimin |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Simple pyrolysis of alginate-based hydrogel cross-linked by bivalent ions into highly porous carbons for energy storage |
| 264 | 1 | |c 2020 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Revised 27.02.2024 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status Publisher | ||
| 520 | |a Copyright © 2020. Published by Elsevier B.V. | ||
| 520 | |a Searching for a sustainable precursor that is capable of absorbing microwave energy is crucial for its rapid conversion into porous carbon via microwave heating. Here, alginate-based hydrogel beads cross-linked by bivalent ions (Cu2+, Zn2+, and Ca2+) are converted into porous carbons (SPCs) in 10 min by applying simple microwave-assisted pyrolysis. Water wrapped in hydrogel beads and bivalent ions serve as initial microwave absorbers to convert alginate into char which acts as a good microwave absorber in the following stages. Additionally, bivalent ions also act as a gelling agent to generate hydrogel beads, as a porogen to obtain a highly porous structure, and as a metal donor to form the SPC/Cu composite. The resultant SPC has a high specific surface area of 1336 m2 g-1, a large total pore volume of 0.56 cm3 g-1, interconnected macropores, as well as a high oxygen content of up to 13.2%. These attractive characteristics give SPC a remarkable rate capability of 72% at 50 A g-1. Interestingly, the interconnected macropores in SPC offer sufficient space for Cu growth via the redox reactions of Cu2+; thus, the SPC/Cu composite without acid wash shows a specific capacitance as high as 804 F g-1 at 0.5 A g-1 | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Pyrolysis | |
| 650 | 4 | |a Sodium alginate | |
| 650 | 4 | |a Supercapacitors | |
| 700 | 1 | |a Luo, Min |e verfasserin |4 aut | |
| 700 | 1 | |a Yang, Kai |e verfasserin |4 aut | |
| 700 | 1 | |a Zhou, Xiaoyan |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t International journal of biological macromolecules |d 1992 |g 158(2020) vom: 05. Mai, Seite 265-274 |w (DE-627)NLM012627356 |x 1879-0003 |7 nnns |
| 773 | 1 | 8 | |g volume:158 |g year:2020 |g day:05 |g month:05 |g pages:265-274 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1016/j.ijbiomac.2020.04.123 |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a GBV_NLM | ||
| 951 | |a AR | ||
| 952 | |d 158 |j 2020 |b 05 |c 05 |h 265-274 | ||