Facile synthesis of ultrathin NiCo2S4 nano-petals inspired by blooming buds for high-performance supercapacitors

Author(s): Yuxiang Wen ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Shanglong Peng ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Zilei Wang ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Jiaxin Hao ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Tianfeng Qin ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Shuqi Lu ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Jiachi Zhang ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Deyan He ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Xiaoyan Fan ⁶ ^, ⁷ ^, ⁸ ^, ⁵ , Guozhong Cao ⁹ ^, ¹⁰ ^, ¹¹ ^, ¹²

Publication date (Electronic): 2017

Journal: Journal of Materials Chemistry A

Publisher: Royal Society of Chemistry (RSC)

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Abstract

3D petal-like NiCo ₂S ₄ nanostructures have been fabricated via a simple, mild and efficient hydrothermal strategy and the growth mechanism of NiCo ₂S ₄ nano-petals has been investigated.

Abstract

3D petal-like NiCo ₂S ₄ nanostructures have been fabricated via a simple, mild and efficient hydrothermal strategy and the growth mechanism of NiCo ₂S ₄ nano-petals has been investigated. Such NiCo ₂S ₄ nano-petal electrodes can deliver an ultrahigh specific capacitance of 2036.5 F g ⁻¹ at a current density of 1 A g ⁻¹, superior rate capability and remarkable cycle stability (94.3% of capacitance retention after 5000 cycles). The as-fabricated asymmetric supercapacitors based on NiCo ₂S ₄ nano-petals//active carbon electrodes demonstrate a high energy density of 35.6 W h kg ⁻¹ at a power density of 819.5 W kg ⁻¹, with both long-term cycling and high rate stabilities. Such supercapacitors have been tested to power ten LEDs (2.03 V, 20 mA) in series for around 60 minutes, indicating their great potential for practical application.

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Advanced materials for energy storage.

Chang Liu, Feng Li, Lai-Peng Ma … (2010)

Popularization of portable electronics and electric vehicles worldwide stimulates the development of energy storage devices, such as batteries and supercapacitors, toward higher power density and energy density, which significantly depends upon the advancement of new materials used in these devices. Moreover, energy storage materials play a key role in efficient, clean, and versatile use of energy, and are crucial for the exploitation of renewable energy. Therefore, energy storage materials cover a wide range of materials and have been receiving intensive attention from research and development to industrialization. In this Review, firstly a general introduction is given to several typical energy storage systems, including thermal, mechanical, electromagnetic, hydrogen, and electrochemical energy storage. Then the current status of high-performance hydrogen storage materials for on-board applications and electrochemical energy storage materials for lithium-ion batteries and supercapacitors is introduced in detail. The strategies for developing these advanced energy storage materials, including nanostructuring, nano-/microcombination, hybridization, pore-structure control, configuration design, surface modification, and composition optimization, are discussed. Finally, the future trends and prospects in the development of advanced energy storage materials are highlighted.