Title: A novel electrodes collocation for asymmetric electrochemical capacitor

Authors: Jiping Zhu; Guang Yang; Quanbao Xu; Junjie Zhao

Addresses: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, Anhui, China ' School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, Anhui, China ' School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, Anhui, China ' School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, Anhui, China

Abstract: The Li₄Ti₅O₁₂ and LiNi_1/3Co_1/3Mn_1/3O₂ electrode materials are prepared by solid state reaction by one step. The structures and morphologies of the LiNi_1/3Co_1/3Mn_1/3O₂ and Li₄Ti₅O₁₂ electrode materials are characterised by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The electrochemical properties of asymmetric electrochemical capacitor are characterised by galvanostatic charge-discharge curves. Comparing the different compounding situations, the results show us the sample that has optimum content, containing active carbon (AC) mixed with 10% LiNi_1/3Co_1/3Mn_1/3O₂ and Li₄Ti₅O₁₂, achieves a high specific capacitance and a good cyclic stability, and the specific capacitance is 178.5F·g⁻¹ at 80 mA·g⁻¹ in the voltage of 1 to 2.5 V, which has the best properties in our experiment.

Keywords: active carbon; electrochemical capacitors; electrode materials; lithium titanate; lithium manganate; electrochemical double-layer capacitors; EDLC; asymmetric electrochemical capacitors; AECs; lithium ion battery materials; solid state reaction; X-ray diffractometry; XRD; scanning electron microscopy; SEM.

DOI: 10.1504/IJNM.2014.058998

International Journal of Nanomanufacturing, 2014 Vol.10 No.1/2, pp.64 - 74

Received: 07 Dec 2012
Accepted: 25 Mar 2013
Published online: 17 May 2014 *

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