Tags

Type your tag names separated by a space and hit enter

Packing Activated Carbons into Dense Graphene Network by Capillarity for High Volumetric Performance Supercapacitors.
Adv Sci (Weinh) 2019; 6(14):1802355AS

Abstract

Supercapacitors are increasingly in demand among energy storage devices. Due to their abundant porosity and low cost, activated carbons are the most promising electrode materials and have been commercialized in supercapacitors for many years. However, their low packing density leads to an unsatisfactory volumetric performance, which is a big obstacle for their practical use where a high volumetric energy density is necessary. Inspired by the dense structure of irregular pomegranate grains, a simple yet effective approach to pack activated carbons into a compact graphene network with graphene as the "peels" is reported here. The capillary shrinkage of the graphene network sharply reduces the voids between the activated carbon particles through the microcosmic rearrangement while retaining their inner porosity. As a result, the electrode density increases from 0.41 to 0.76 g cm-3. When used as additive-free electrodes for supercapacitors in an ionic liquid electrolyte, this porous yet dense electrode delivers a volumetric capacitance of up to 138 F cm-3, achieving high gravimetric and volumetric energy densities of 101 Wh kg-1 and 77 Wh L-1, respectively. Such a graphene-assisted densification strategy can be extended to the densification of other carbon or noncarbon particles for energy devices requiring a high volumetric performance.

Authors+Show Affiliations

Nanoyang Group State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300350 China. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300072 China.Nanoyang Group State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300350 China. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300072 China.Nanoyang Group State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300350 China. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300072 China.Nanoyang Group State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300350 China. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300072 China.Shenzhen Key Laboratory for Graphene-based Materials Graduate School at Shenzhen Tsinghua University Shenzhen 518055 China.Nanoyang Group State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300350 China. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300072 China.Shenzhen Key Laboratory for Graphene-based Materials Graduate School at Shenzhen Tsinghua University Shenzhen 518055 China.Nanoyang Group State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300350 China. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300072 China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31380202

Citation

Li, Pei, et al. "Packing Activated Carbons Into Dense Graphene Network By Capillarity for High Volumetric Performance Supercapacitors." Advanced Science (Weinheim, Baden-Wurttemberg, Germany), vol. 6, no. 14, 2019, p. 1802355.
Li P, Li H, Han D, et al. Packing Activated Carbons into Dense Graphene Network by Capillarity for High Volumetric Performance Supercapacitors. Adv Sci (Weinh). 2019;6(14):1802355.
Li, P., Li, H., Han, D., Shang, T., Deng, Y., Tao, Y., ... Yang, Q. H. (2019). Packing Activated Carbons into Dense Graphene Network by Capillarity for High Volumetric Performance Supercapacitors. Advanced Science (Weinheim, Baden-Wurttemberg, Germany), 6(14), p. 1802355. doi:10.1002/advs.201802355.
Li P, et al. Packing Activated Carbons Into Dense Graphene Network By Capillarity for High Volumetric Performance Supercapacitors. Adv Sci (Weinh). 2019 Jul 17;6(14):1802355. PubMed PMID: 31380202.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Packing Activated Carbons into Dense Graphene Network by Capillarity for High Volumetric Performance Supercapacitors. AU - Li,Pei, AU - Li,Huan, AU - Han,Daliang, AU - Shang,Tongxin, AU - Deng,Yaqian, AU - Tao,Ying, AU - Lv,Wei, AU - Yang,Quan-Hong, Y1 - 2019/05/08/ PY - 2018/12/28/received PY - 2019/04/02/revised PY - 2019/8/6/entrez PY - 2019/8/6/pubmed PY - 2019/8/6/medline KW - activated carbons KW - capillary shrinkage KW - compact graphene network KW - supercapacitors KW - volumetric performance SP - 1802355 EP - 1802355 JF - Advanced science (Weinheim, Baden-Wurttemberg, Germany) JO - Adv Sci (Weinh) VL - 6 IS - 14 N2 - Supercapacitors are increasingly in demand among energy storage devices. Due to their abundant porosity and low cost, activated carbons are the most promising electrode materials and have been commercialized in supercapacitors for many years. However, their low packing density leads to an unsatisfactory volumetric performance, which is a big obstacle for their practical use where a high volumetric energy density is necessary. Inspired by the dense structure of irregular pomegranate grains, a simple yet effective approach to pack activated carbons into a compact graphene network with graphene as the "peels" is reported here. The capillary shrinkage of the graphene network sharply reduces the voids between the activated carbon particles through the microcosmic rearrangement while retaining their inner porosity. As a result, the electrode density increases from 0.41 to 0.76 g cm-3. When used as additive-free electrodes for supercapacitors in an ionic liquid electrolyte, this porous yet dense electrode delivers a volumetric capacitance of up to 138 F cm-3, achieving high gravimetric and volumetric energy densities of 101 Wh kg-1 and 77 Wh L-1, respectively. Such a graphene-assisted densification strategy can be extended to the densification of other carbon or noncarbon particles for energy devices requiring a high volumetric performance. SN - 2198-3844 UR - https://www.unboundmedicine.com/medline/citation/31380202/Packing_Activated_Carbons_into_Dense_Graphene_Network_by_Capillarity_for_High_Volumetric_Performance_Supercapacitors L2 - https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31380202/ DB - PRIME DP - Unbound Medicine ER -