Tunable stable operating potential window for high-voltage aqueous supercapacitors
Type
ArticleAuthors
Li, JianminAn, Lin
Li, Haizeng
Sun, Jianqi
Shuck, Christopher
Wang, Xuehang
Shao, Yuanlong
Li, Yaogang
Zhang, Qinghong
Wang, Hongzhi
KAUST Department
Physical Science and Engineering (PSE) DivisionDate
2019-06-22Online Publication Date
2019-06-22Print Publication Date
2019-09Embargo End Date
2021-06-22Permanent link to this record
http://hdl.handle.net/10754/656262
Metadata
Show full item recordAbstract
The relatively low operating voltage window of aqueous energy storage devices is a key parameter that limits their energy density. Electrode materials with high electrochemical activities and a wide stable working potential range are crucially needed. Herein, we reported a strategy to control the working potential range of the negative electrode by optimizing the component proportion of molybdenum-tungsten-oxide solid-state solutions. The operating potential range of the molybdenum-tungsten-oxide solid-state solutions was tunable between −0.4 and −1.2 V. An asymmetric supercapacitor device was fabricated by using a Mo0.1W0.9O3-x/single-walled carbon nanotube film as the negative electrode and a commercial activated carbon film as the positive electrode. The optimized device showed a stable working voltage of 2.0 V in 1 M Li2SO4 aqueous electrolyte. This study opens up new avenues for developing high voltage window aqueous energy storage devices.Citation
Li, J., An, L., Li, H., Sun, J., Shuck, C., Wang, X., … Wang, H. (2019). Tunable stable operating potential window for high-voltage aqueous supercapacitors. Nano Energy, 63, 103848. doi:10.1016/j.nanoen.2019.06.044Sponsors
We gratefully acknowledge the financial support by Science and Technology Commission of Shanghai Municipally (16JC1400700), Innovation Program of Shanghai Municipal Education Commission (2017-01-07-00-03-E00055), the Shanghai Natural Science Foundation (16ZR1401500), the Shanghai Sailing Program (16YF1400400), and the Program of Introducing Talents of Discipline to Universities (No.111-2-04). J. L. acknowledges support through the Fundamental Research Funds for the Central Universities (CUSF-DH-D-2017028). We thank Jim Bailey, PhD, from Liwen Bianji, Edanz Editing China (www.liwenbianji.cn/ac), for editing the English text of a draft of this manuscript.Publisher
Elsevier LtdJournal
Nano EnergyAdditional Links
https://linkinghub.elsevier.com/retrieve/pii/S2211285519305488ae974a485f413a2113503eed53cd6c53
10.1016/j.nanoen.2019.06.044