Home
Dr.Wu
Research
Member
Publications
News
Contact
Congratulation to Shuanghao Zheng on ACS Nano Publication
Congratulation to Shuanghao Zheng on ACS Nano Publication
Posted:2017-03-24    Column:2017News
Our paper on "High Packing Density Unidirectional Arrays of Vertically Aligned Graphene with Enhanced Areal Capacitance for High-Power Micro-Supercapacitors" has been just accepted online in high-impact journal ACS Nano (IF=13.33). Many thanks to our cooperative scientists of Prof.BAO, Prof.Q. Fu and Prof.C.L. Sun at DICP, and Prof.L.W. Guo from Institute of Physics, CAS. Again, congratulation to Shuanghao Zheng!

                        

Interfacial integration of the shape-engineered electrode with strongly bonded current collector is the key for minimizing both ionic and electronic resistance, and then developing high-power supercapacitors. Herein, we demonstrated the construction of high-power micro-supercapacitors (VG-MSCs) based on high-density unidirectional arrays of vertically aligned graphene (VG) nanosheets, derived from thermally decomposed SiC substrate. The as-grown VG arrays showed a standing basal plane orientation grown on (0001(-)) SiC substrate, tailored thickness (3.5~28 μm), high-density structurally ordering alignment of graphene consisting of 1~5 layers, vertically oriented edges, open inter-sheet channels, high electrical conductivity (192 S cm-1), and strong bonding of the VG edges to SiC substrate. As a result, the demonstrated VG-MSCs displayed high areal capacitance of ~7.3 mF cm-2, and a fast frequency response with a short time constant of 9 ms. Furthermore, VG-MSCs in both aqueous polymer gel electrolyte and non-aqueous ionic liquid of 1-ethyl-3-methylimidazolium tetrafluoroborate operated well at a high scan rate of up to 200 V s-1. More importantly, VG-MSCs offered a high power density of ~15 W cm-3 in gel electrolyte and ~61 W cm-3 in ionic liquid. Therefore, this strategy of producing high-density unidirectional VG nanosheets directly bonded on SiC current collector demonstrated the feasibility for manufacturing high-power compact supercapacitors.

See the publication: S.H. Zheng, Z. L. Li, Z.-S. Wu*, Y. F. Dong, F. Zhou, S. Wang, Q. Fu, C. L. Sun, L. W. Guo*, and X. H. Bao. High Packing Density Unidirectional Arrays of Vertically Aligned Graphene with Enhanced Areal Capacitance for High-Power Micro-Supercapacitors. ACS Nano, 2017, DOI: 10.1021/acsnano.7b00553.

Dalian Institute of Chemical Physics, CAS
457 Zhongshan Road Dalian, China 116023
E-mail: wuzs@dicp.ac.cn
Copyright © 2015-2017. 2D Materials & Energy Devices Lab. All Rights Reserved. 网站管理 Home / Dr.Wu / Research / Member / Publications / News / Contact