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| Preparation and Capacitive Performance Study of the Lignin-containing Cellulose Nanofibril/Polypyrrole Composite Film |
| Received:June 30, 2025 Revised:July 20, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.10.012 |
| Key Words:poplar chemi-mechanical pulp lignin-containing cellulose nanofibril film electrodes capacitive performance |
| Fund Project:山东世纪阳光纸业集团有限公司合作项目（2024370725108864，2022370113146375）。 |
| Author Name | Affiliation | Postcode | | XU Feng* | Shandong Century Sunshine Paper Group Co., Ltd., Weifang, Shandong Province, 262400 | 262400 | | WANG Dongxing | Shandong Century Sunshine Paper Group Co., Ltd., Weifang, Shandong Province, 262400 | 262400 | | CI Xiaolei* | Shandong Century Sunshine Paper Group Co., Ltd., Weifang, Shandong Province, 262400 | 262400 | | SHAO Xuejun | Shandong Century Sunshine Paper Group Co., Ltd., Weifang, Shandong Province, 262400 | 262400 | | WANG Yuebin | Shandong Century Sunshine Paper Group Co., Ltd., Weifang, Shandong Province, 262400 | 262400 | | LIU Chunlan | Shandong Century Sunshine Paper Group Co., Ltd., Weifang, Shandong Province, 262400 | 262400 | | TIAN Baonong | Shandong Century Sunshine Paper Group Co., Ltd., Weifang, Shandong Province, 262400 | 262400 | | GE Yinkai | Shandong Century Sunshine Paper Group Co., Ltd., Weifang, Shandong Province, 262400 | 262400 |
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| Abstract:In this study， lignin-containing cellulose nanofibril (LCNF) was prepared using poplar chemi-mechanical pulp as the raw material， which was sequentially subjected to 2，2，6，6-tetramethylpiperidine-N-oxide (TEMPO) radical oxidation， high-shear treatment and high-pressure homogenization. The LCNF was then used as a flexible substrate to prepare LCNF/polypyrrole (LNP) composite film electrodes. Furthermore， the effects of TEMPO oxidation degree on the residual lignin content， yield and morphology of LCNF， as well as on the microstructure of LNP composite film were investigated， and the structure-activity relationship between LNP structure and capacitance performance was analyzed. The results showed that as the degree of TEMPO oxidation increased， the lignin content and size of the LCNF decreased gradually. The morphology of LCNF and LNP composite film could be altered by the lignin through the regulation of fibrillation. This could further affect the microstructure of LNP composite film through adhesion， thereby improving its capacitance performance. In addition， lignin could also provide pseudocapacitance of LNP composite film via the reversible conversion of the quinone/hydroquinone structure. Moreover， the supercapacitor assembled with the LNP-13.8% composite film exhibited a power density of 499.9 μW/cm² and an energy density of 88.6 μWh/cm²， demonstrating excellent energy storage capability. |
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