NiCo2O4 with unique 3D miniature sea urchins as binder-free electrode for high performance asymmetric supercapacitor

被引：19

作者：

Liu, Qian ^{[1
]}

Liu, Jie ^{[1
]}

Xu, Dawei ^{[1
]}

Liu, Chaoran ^{[1
]}

Lu, Zhe ^{[1
]}

Xuan, Dipan ^{[1
]}

Wang, Zhuang ^{[1
]}

Ye, Yueyuan ^{[1
,2
]}

Wang, Duo ^{[1
]}

Li, Shuirong ^{[1
]}

Wang, Dechao ^{[1
]}

Zheng, Zhifeng ^{[1
,2
]}

机构：

[1] Xiamen Univ, Coll Energy,Fujian Prov Ind Technol Dev Base New, Fujian Prov Engn & Res Ctr Clean & High Valued Te, Xiamen Key Lab High Valued Convers Technol Agr Bi, Xiamen 361102, Peoples R China

[2] Innovat Lab Sci & Technol Energy Mat Fujian Prov, Xiamen 361005, Peoples R China

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2022年 / 908卷

关键词：

Binder-free; NiCO2O4; 3D miniature sea urchins; Asymmetric supercapacitor; NICKEL FOAM; CARBON CLOTH; ARRAYS; CAPACITANCE; STRATEGY; ANODE;

D O I：

10.1016/j.jelechem.2022.116068

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Binder-free bimetallic oxides, especially NiCo2O4, are important electrode materials for asymmetric supercapacitors (ASCs), and their structural characteristics have a profound effect on the electrochemical performance. Herein, mesoporous NiCo2O4 with unique double layer structure formed by 3D miniature sea urchins growing on the first layer with nanowire arrays on nickel foam (NiCo2O4/NF) are prepared. The prepared NiCo2O4 can be used as an electrode without adding conducive agent and binder. Under different hydrothermal time (NCO/NF-x, x = 6, 8, 10 and 12 h), NCO/NF-10 shows the largest specific surface area of 83 m(2) g(-1) and the highest specific capacitance of 2010F g(-1) at 1 A g(-1). The capacitance retention rate of the asymmetric supercapacitor assembled by NCO/NF-10 with activated carbon (AC) can reach 87% after 4500 cycles, and the maximum energy density is 37.4 Wh Kg(-1) at a power density of 400 W Kg(-1).

引用

页数：10

共 59 条

[1] Oxalic acid assisted rapid synthesis of mesoporous NiCo2O4 nanorods as electrode materials with higher energy density and cycle stability for high-performance asymmetric hybrid supercapacitor applications [J].