SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 47 ›› Issue (7): 31-38.DOI: 10.1016/j.cjche.2021.07.025

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N, P co-doped porous graphene with high electrochemical properties obtained via the laser induction of cellulose nanofibrils

Jie Wei, Weiwei Yang, Shuai Jia, Jie Wei, Ziqiang Shao   

  1. Beijing Engineering Research Center of Cellulose and Its Derivatives, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
  • Received:2021-02-19 Revised:2021-07-22 Online:2022-08-19 Published:2022-07-28
  • Contact: Ziqiang Shao,E-mail:shaoziqiang@263.net
  • Supported by:
    The characterization results were supported by Beijing Zhongkebaice Technology Service Co., Ltd. The authors would like to thank all the reviewers who participated in the review and MJEditor (www.mjeditor.com) for its linguistic assistance during the preparation of this manuscript.

N, P co-doped porous graphene with high electrochemical properties obtained via the laser induction of cellulose nanofibrils

Jie Wei, Weiwei Yang, Shuai Jia, Jie Wei, Ziqiang Shao   

  1. Beijing Engineering Research Center of Cellulose and Its Derivatives, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
  • 通讯作者: Ziqiang Shao,E-mail:shaoziqiang@263.net
  • 基金资助:
    The characterization results were supported by Beijing Zhongkebaice Technology Service Co., Ltd. The authors would like to thank all the reviewers who participated in the review and MJEditor (www.mjeditor.com) for its linguistic assistance during the preparation of this manuscript.

Abstract: Cellulose and its derivatives are natural materials with high carbon contents, but it is challenging to convert their carbon into high value-added carbonaceous materials (e.g., graphene). Here, an approach to convert the carbon in cellulose into N, P co-doped porous graphene (LIG) materials via laser induction is proposed. Cellulose nanofibrils (CNFs), a cellulose derivative with high dispersion uniformity and abundant surface hydroxyl groups, were easily formed on a bulk substrate (thickness ≥ 5 mm) containing ammonium polyphosphate (APP). Then, a 10.6 μm CO2 laser was used to scribe for 1-5 passes on the CNFs/APP substrate under an ambient environment to produce N, P co-doped porous LIG. Upon increasing the number of laser scribing passes, the IG/ID of LIG first increased and then decreased, reaching a maximum of 1.68 at 4 passes. The good pore structure and low resistance also showed that 4 laser passes were ideal. Besides, the N, P co-doped LIG also showed excellent electrochemical performance, with a specific capacitance of 221.4 F?g-1 and capacitance retention of 89.9%. This method exploits the advantages of nanocellulose and overcomes the difficulties associated with directly compounding cellulosic materials, providing a method for the further development of biomass nanomaterials.

Key words: Cellulose nanofibrils, Laser induction, Porous graphene, Multiple lasing, Supercapacitor

摘要: Cellulose and its derivatives are natural materials with high carbon contents, but it is challenging to convert their carbon into high value-added carbonaceous materials (e.g., graphene). Here, an approach to convert the carbon in cellulose into N, P co-doped porous graphene (LIG) materials via laser induction is proposed. Cellulose nanofibrils (CNFs), a cellulose derivative with high dispersion uniformity and abundant surface hydroxyl groups, were easily formed on a bulk substrate (thickness ≥ 5 mm) containing ammonium polyphosphate (APP). Then, a 10.6 μm CO2 laser was used to scribe for 1-5 passes on the CNFs/APP substrate under an ambient environment to produce N, P co-doped porous LIG. Upon increasing the number of laser scribing passes, the IG/ID of LIG first increased and then decreased, reaching a maximum of 1.68 at 4 passes. The good pore structure and low resistance also showed that 4 laser passes were ideal. Besides, the N, P co-doped LIG also showed excellent electrochemical performance, with a specific capacitance of 221.4 F?g-1 and capacitance retention of 89.9%. This method exploits the advantages of nanocellulose and overcomes the difficulties associated with directly compounding cellulosic materials, providing a method for the further development of biomass nanomaterials.

关键词: Cellulose nanofibrils, Laser induction, Porous graphene, Multiple lasing, Supercapacitor