NANO: Brief Reports and Reviews Vol. 11, No. 11 (2016) 1650120 (7 pages) © World Scienti¯c Publishing Company DOI: 10.1142/S1793292016501204
Carbon Nanotube Paper as Anode for Flexible Lithium-Ion Battery
Xiaogang Sun * , Zhenhong Liu * , Neng Li † , Xiaoyong Wu * , YanyanNie * , Zhipeng Pang * , LifuYue * and Hao Tang † , ‡ * School of Mechantronics Engineering Nanchang University, Nanchang 330031, P. R. China † Institute of Photovoltaics, Nanchang University Nanchang 330031, P. R. China ‡ 291065228@qq.com
Received 21 January 2016 Accepted 30 June 2016 Published 12 September 2016
In this investigation, multiwalled carbon nanotube (MWCNT) paper consists of MWCNTs and cellulose was fabricated by traditional paper-making method. It was applied directly as negative electrode in °exible lithium ion battery to replace ordinary electrode which is combined with anode material and current collector. The electrochemical performances of the as-produced MWCNT paper (AMP) and carbonized MWCNT paper (CMP) were evaluated in this study. The morphology and structure of the MWCNT papers were observed by scanning electron microscopy (SEM). The electrochemical performance of the battery was operated by cell test and electrochemical impedance spectroscopy (EIS) measurement. The charging and discharging results indicated that the CMP behaves with higher capacity than AMP. And the EIS analysis showed that a lower charge transfer resistance can be obtained in the CMP. The excellent electrochemical performance veri¯es the feasibility of MWCNT papers as a promising candidate for the anode in °exible lithium ion battery.
Keywords : Multiwalled carbon nanotubes; °exible lithium ion battery; cellulose; negative electrode; anode.
1. Introduction The °exible lithium ion battery has attracted great attentions with the development of wearable and portable electronics, such as bracelet and cellular phone. Some progresses have been achieved in °exible electrode materials based on carbon nanotubes, 1 – 11 graphene, 12,13 carbon paper, 14 – 19 conductive paper, 20 – 22 textile and other low-di- mensional materials. 23 The °exible electrode mate- rials are core components for fabricating °exible
lithium ion battery. Carbon nanotubes (CNTs) have unique features of one-dimension, large surface area and high conductivity, which will make a contribution to electrochemical performance in a cell. 24 – 26 Thus, many investigations in terms of electrode materials are focused on CNTs. CNT ¯lm used as negative electrode or anode current collector was applied in °exible lithium ion battery in many researches. 27,28 The binder free CNT ¯lm consisting of continuous CNT bundles is °exible and
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