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Biomass Chemical Engineering ›› 2019, Vol. 53 ›› Issue (6): 1-8.doi: 10.3969/j.issn.1673-5854.2019.06.001

• Research Report •     Next Articles

Preparation and Characteristics of Rubber Wood Cellulose Nanofibrils/MnO2/CNTs Flexible Electrode Materials

Dingyuan ZHENG1(),Jinquan YUE1,Daran YUE2,Mengyang LI1,Xianquan ZHANG1,*()   

  1. 1. Key Laboratory of Bio-Based Materials Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
    2. Institute of Tropical Agriculture and Forestry, Hainan University, Danzhou 571700, China
  • Received:2018-10-17 Online:2019-11-30 Published:2019-12-10
  • Contact: Xianquan ZHANG E-mail:zhengdingyuan0521@outlook.com;zhangxianquan2013@aliyun.com

Abstract:

Rubber wood purified cellulose fibrils(PCF) were prepared by chemical treatment. Cellulose nanofibrils(CNF) was obtained by high-speed shearing followed by ultrasonication. Manganese dioxide(MnO2) nanosheet was prepared by one-way synthesis method. Flexible electrode materials were prepared by vacuum filtration using CNF as structural support, MnO2 and carbon nanotubes(CNTs) as active electrode materials. The structure and properties of CNF, MnO2 and electrode materials were characterized by various means, and the electrochemical properties of the prepared electrode materials were characterized. The results showed that the diameter of CNF was 3-10 nm. The obtained CNF had a large aspect ratio and could be utilized as a good structural substrate. Additionally, CNF had typical cellulose type I structure. The MnO2 nanosheets had petal-like structure with a crystal form of δ. The results of electrochemical performance showed that the specific capacitances at the scan rate of 50 mV/s and the current density of 0.1 A/g were 78.45 and 97.02 F/g, respectively. In the low frequency region, the slope of the straight part of the electrochemical impedance spectroscopy(EIS) was large, which indicated that the electrode material had good capacitance characteristics. The capacitance retention of the electrode material was always maintained at about 99% during the 200 charge and discharge cycle test. The results showed that the electrode material had good electrochemical properties and certain flexibility, and can be used as an electrode material for supercapacitors.

Key words: rubber wood, cellulose nanofibrils, manganese dioxide, carbon nanotubes, flexible electrode materials

CLC Number: