Issue 8, 2012
From the journal:

RSC Advances

Synthesis of dinickel phosphide (Ni2P) for fast lithium-ion transportation: a new class of nanowires with exceptionally improved electrochemical performance as a negative electrode

Yi Lu,a   Jiang-ping Tu,*a   Qin-qin Xiong,a   Yan-qiang Qiao,a   Xiu-li Wang,a   Chang-dong Gua  and  Scott X. Maob  

* Corresponding authors

a State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, China
E-mail: tujp@zju.edu.cn
Fax: (+86)-571-87952573
Tel: (+86)-571-87952856

b Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Abstract

Single-crystalline dinickel phosphide (Ni2P) nanowires with a uniform diameter of about 8 nm and lengths of 100–200 nm were synthesized from the thermal decomposition of continuously delivered Ni-TOP complexes using a syringe pump. These Ni2P nanowires deliver specific reversible capacities of 434 mA h g−1 at 0.1 C, 326 mA h g−1 at 0.5 C after 50 cycles, and also exhibit good rate performance. The improved electrochemical performance is attributed to the small size and stable cylindrical structure, which result in a high interfacial contact area with the electrolyte, and relieve the strain or accommodate volume expansion/contraction of these Ni2P nanowires. Electrochemical impedance spectra confirms that these Ni2P nanowires possess enhanced electrical conductivity, which facilitates the lithium ion and electron transportation in the electrode.

Graphical abstract: Synthesis of dinickel phosphide (Ni2P) for fast lithium-ion transportation: a new class of nanowires with exceptionally improved electrochemical performance as a negative electrode

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Article information

DOI
https://doi.org/10.1039/C2RA01227H
Article type
Paper
Submitted
02 Dec 2011
Accepted
20 Jan 2012
First published
29 Feb 2012

RSC Adv., 2012,2, 3430-3436

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Synthesis of dinickel phosphide (Ni2P) for fast lithium-ion transportation: a new class of nanowires with exceptionally improved electrochemical performance as a negative electrode

Y. Lu, J. Tu, Q. Xiong, Y. Qiao, X. Wang, C. Gu and S. X. Mao, RSC Adv., 2012, 2, 3430 DOI: 10.1039/C2RA01227H

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