Na4Co3P4O15 in situ transformation to Co(OH)2/CoO(OH) nanoforms for aqueous supercapacitor using redox additive electrolyte

Butenko，Denys S.1; Li，Shilin2; Chen，Ruoyu2; Odynets，Ievgen V.2; Li，Dongdong2; Yuan，Zeyu2; Zhang，Xinyu1; Zatovsky，Igor2,3

2022-12-01

10.1016/j.mseb.2022.116051

Materials Science and Engineering B-Advanced Functional Solid-State Materials   Impact Factor & Quartile

0921-5107

1873-4944

We consider a strategy to improve the basic characteristics of hybrid supercapacitors by sequentially modifying electrode materials and electrolytes. The cathode was fabricated by converting NaCoPO in situ to the Co(OH)/CoO(OH) nanoforms in an alkaline electrolyte. Electrochemical tests have shown additional possibilities to increase the specific capacity of electrodes using a combined alkaline electrolyte 1 M KOH + 0.1 M K[Fe(CN)]. Low-cost commercial carbon was used as the anode material, which has been subsequently activated by KOH at 850 °C (Ar atmosphere). This treatment has allowed increasing the porosity and surface area of carbon from 937.2 to 1441.2 m⋅g, and electrochemical capacity from 58 to 101.2 F⋅g. The assembled hybrid supercapacitor demonstrates significant specific energy of 42 W⋅h⋅kg with a power density of 400 W⋅kg and has a good stability of cycle life (retains more than 78.3% capacity after 5000 charge–discharge cycles). The proposed technological routes can improve supercapacitors in the energy sector.

Energy storage materials Nanostructured materials Phosphates Porous carbon Supercapacitor

SCI

English

First ; Corresponding

National Natural Science Foundation of China (NSFC)[21571080]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Condensed Matter

WOS:000886042200002

ELSEVIER

2-s2.0-85139225921

Scopus

1.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
2.College of Physics,Jilin University,Changchun City,2699 Qianjin st.,130012,China
3.F.D. Ovcharenko Institute of Biocolloidal Chemistry,NAS Ukraine,Kyiv,42 Acad. Vernadskoho blv.,03142,Ukraine

Butenko，Denys S.,Li，Shilin,Chen，Ruoyu,et al. Na4Co3P4O15 in situ transformation to Co(OH)2/CoO(OH) nanoforms for aqueous supercapacitor using redox additive electrolyte[J]. Materials Science and Engineering B-Advanced Functional Solid-State Materials,2022,286.

Butenko，Denys S..,Li，Shilin.,Chen，Ruoyu.,Odynets，Ievgen V..,Li，Dongdong.,...&Zatovsky，Igor.(2022).Na4Co3P4O15 in situ transformation to Co(OH)2/CoO(OH) nanoforms for aqueous supercapacitor using redox additive electrolyte.Materials Science and Engineering B-Advanced Functional Solid-State Materials,286.

Butenko，Denys S.,et al."Na4Co3P4O15 in situ transformation to Co(OH)2/CoO(OH) nanoforms for aqueous supercapacitor using redox additive electrolyte".Materials Science and Engineering B-Advanced Functional Solid-State Materials 286(2022).