Redox-Driven Route for Widening Voltage Window in Asymmetric Supercapacitor.

التفاصيل البيبلوغرافية
العنوان:	Redox-Driven Route for Widening Voltage Window in Asymmetric Supercapacitor.
المؤلفون:	Sahoo R; Center for Integrated Nanostructure Physics (CINAP) , Institute for Basic Science (IBS) , Suwon 16419 , Republic of Korea.; Department of Energy Science , Sungkyunkwan University (SKKU) , Suwon 16419 , Republic of Korea., Pham DT; Center for Integrated Nanostructure Physics (CINAP) , Institute for Basic Science (IBS) , Suwon 16419 , Republic of Korea.; Department of Energy Science , Sungkyunkwan University (SKKU) , Suwon 16419 , Republic of Korea., Lee TH; Center for Integrated Nanostructure Physics (CINAP) , Institute for Basic Science (IBS) , Suwon 16419 , Republic of Korea.; Department of Energy Science , Sungkyunkwan University (SKKU) , Suwon 16419 , Republic of Korea., Luu THT; Center for Integrated Nanostructure Physics (CINAP) , Institute for Basic Science (IBS) , Suwon 16419 , Republic of Korea.; Department of Energy Science , Sungkyunkwan University (SKKU) , Suwon 16419 , Republic of Korea., Seok J; Center for Integrated Nanostructure Physics (CINAP) , Institute for Basic Science (IBS) , Suwon 16419 , Republic of Korea.; Department of Energy Science , Sungkyunkwan University (SKKU) , Suwon 16419 , Republic of Korea., Lee YH; Center for Integrated Nanostructure Physics (CINAP) , Institute for Basic Science (IBS) , Suwon 16419 , Republic of Korea.; Department of Energy Science , Sungkyunkwan University (SKKU) , Suwon 16419 , Republic of Korea.
المصدر:	ACS nano [ACS Nano] 2018 Aug 28; Vol. 12 (8), pp. 8494-8505. Date of Electronic Publication: 2018 Jul 27.
نوع المنشور:	Journal Article
اللغة:	English
بيانات الدورية:	Publisher: American Chemical Society Country of Publication: United States NLM ID: 101313589 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1936-086X (Electronic) Linking ISSN: 19360851 NLM ISO Abbreviation: ACS Nano Subsets: PubMed not MEDLINE
أسماء مطبوعة:	Original Publication: Washington D.C. : American Chemical Society
مستخلص:	Although aqueous asymmetric supercapacitors are promising technologies because of their high-energy density and enhanced safety, their voltage window is still limited by the narrow stability window of water. Redox reactions at suitable electrodes near the water splitting potential can increase the working potential. Here, we demonstrate a kinetic approach for expanding the voltage window of aqueous asymmetric supercapacitors using in situ activated Mn 3 O 4 and VO 2 electrodes. The underlying mechanism indicates a specific potential of ∼1 V vs Ag/AgCl for the oxidation of Mn ⁴⁺ -to-Mn ⁷⁺ at the positive electrode and ∼ -0.8 V vs Ag/AgCl for the reduction of V ³⁺ -to-V ²⁺ at the negative electrode, which limits oxygen and hydrogen evolution reactions, respectively. The as-fabricated aqueous asymmetric supercapacitor exhibited a working voltage of 2.2 V with a high-energy density of 42.7 Wh/kg and a power density of ∼1.1 kW/kg. This mechanism improves the voltage window and energy and power densities.
فهرسة مساهمة:	Keywords: aqueous asymmetric supercapacitor; energy density; power density; voltage window; water splitting potential
تواريخ الأحداث:	Date Created: 20180726 Latest Revision: 20191120
رمز التحديث:	20240628
DOI:	10.1021/acsnano.8b04040
PMID:	30044606
قاعدة البيانات:	MEDLINE

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الوصف
تدمد:	1936-086X
DOI:	10.1021/acsnano.8b04040