Intertwined carbon networks derived from Polyimide/Cellulose composite as porous electrode for symmetrical supercapacitor

Huiling Li; Lihua Cao; Huijun Zhang; Zhiwei Tian; Qian Zhang; Feng Yang; Haoqi Yang; Shuijian He; Shaohua Jiang

doi:10.1016/j.jcis.2021.11.188

Intertwined carbon networks derived from Polyimide/Cellulose composite as porous electrode for symmetrical supercapacitor

J Colloid Interface Sci. 2022 Mar:609:179-187. doi: 10.1016/j.jcis.2021.11.188. Epub 2021 Dec 2.

Authors

Huiling Li¹, Lihua Cao¹, Huijun Zhang¹, Zhiwei Tian¹, Qian Zhang², Feng Yang³, Haoqi Yang⁴, Shuijian He¹, Shaohua Jiang⁵

Affiliations

¹ Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
² College of Science, Nanjing Forestry University, Nanjing 210037, China. Electronic address: zhangqian5689@njfu.edu.cn.
³ School of Modern Equipment Manufacturing, Changzhou Institute of Industry Technology, Changzhou, 213164, China.
⁴ State Key Laboratory of New Building Materials, Beixin Academy of Sciences, Beijing New Building Materials (BNBM) Public Limited Company, Beijing, 102209, China. Electronic address: yanghq@bnbm.com.cn.
⁵ Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China. Electronic address: shaohua.jiang@njfu.edu.cn.

PMID: 34894552
DOI: 10.1016/j.jcis.2021.11.188

Abstract

Designing intertwined porous structure is highly desirable to improve the electrochemical performance of carbon materials for supercapacitor. In this contribution, three-dimensional (3D) carbonized polyimide/cellulose (CPC) composite is fabricated via a facile "one-step" carbonization, in which cellulose as cross-linked agent is capable of modulating the molecular structure of polyamic acid, thus ensuring the formation of intertwined porous networks in the obtained carbon skeleton. Benefitting from the high specific surface area (951 m² g^-1) and uniformly distributed pores, the optimized CPC-5 electrode exhibits an outstanding specific capacitance of 300F g^-1 in 6.0 M KOH electrolyte. More impressively, the CPC-5 based symmetrical supercapacitor affords a high energy density of 22.6 Wh kg^-1 at power density of 800 W kg^-1, as well as an exceptional capacitance retention of 91.4% after 10,000 cycles. This work affords an effective strategy to yield a promising polyimide derived carbon material for high-performance supercapacitors.

Keywords: Cellulose; Intertwined carbon network; Nitrogen doping; Polyimide; Supercapacitor.

MeSH terms

Carbon*
Cellulose*
Electric Capacitance
Electrodes
Porosity

Substances

Carbon
Cellulose