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Low-crystalline Iron Oxide Hydroxide Nanoparticle Anode for High-Performance Supercapacitors

Low-crystalline Iron Oxide Hydroxide Nanoparticle Anode for High-Performance Supercapacitors

Kwadwo Asare Owusu, Longbing Qu, Jiantao Li, Zhaoyang Wang, Kangning Zhao, Chao Yang, Kalele Mulonda Hercule, Chao Lin, Changwei Shi, Qiulong Wei, Liang Zhou, Liqiang Mai

Nat Commun. 2017 Mar 6;8:14264.

PMID: 28262797

Abstract:

Carbon materials are generally preferred as anodes in supercapacitors; however, their low capacitance limits the attained energy density of supercapacitor devices with aqueous electrolytes. Here, we report a low-crystalline iron oxide hydroxide nanoparticle anode with comprehensive electrochemical performance at a wide potential window. The iron oxide hydroxide nanoparticles present capacitances of 1,066 and 716 F g-1 at mass loadings of 1.6 and 9.1 mg cm-2, respectively, a rate capability with 74.6% of capacitance retention at 30 A g-1, and cycling stability retaining 91% of capacitance after 10,000 cycles. The performance is attributed to a dominant capacitive charge-storage mechanism. An aqueous hybrid supercapacitor based on the iron oxide hydroxide anode shows stability during float voltage test for 450 h and an energy density of 104 Wh kg-1 at a power density of 1.27 kW kg-1. A packaged device delivers gravimetric and volumetric energy densities of 33.14 Wh kg-1 and 17.24 Wh l-1, respectively.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS76772	Iron oxide hydroxide			Price

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