文献类型：期刊文献

英文题名：Hierarchical porous structure carbon nanosheets derived from sodium lignosulfonate for high-performance supercapacitors

作者：Wu, Dichao[1,2,3] Chen, Changzhou[1,2,3] Li, Jihui[1,2] Jian, Xiaopeng[1,2,3] Wang, Ao[1,2] Sun, Kang[1,2,3] Jiang, Jianchun[1,2]

第一作者：Wu, Dichao

通信作者：Sun, K[1];Sun, K[2];Sun, K[3]|[a0005ed788bbcee14a240]孙康;

机构：[1]Chinese Acad Forestry, Natl Engn Lab Biomass Chem Utilizat, Inst Chem Ind Forest Prod, Key Lab Biomass Energy & Mat, Nanjing 210042, Peoples R China;[2]Chinese Acad Forestry, Key & Open Lab Forest Chem Engn, SFA, Nanjing 210042, Peoples R China;[3]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Peoples R China

年份：2020

卷号：44

期号：48

起止页码：21271-21278

外文期刊名：NEW JOURNAL OF CHEMISTRY

收录：;EI(收录号：20205309703181);Scopus(收录号：2-s2.0-85098280955);WOS:【SCI-EXPANDED(收录号:WOS:000600798600043)】；

基金：Authors are grateful for the financial support from the National Natural Science Foundation of China (31770629), the Natural Science Foundation of Jiangsu Province (BK20180154) and the Foundation of Jiangsu Key Lab of Biomass Energy and Material (JSBEM-S-201804).

语种：英文

外文关键词：Bioconversion - Boride coatings - Capacitance - Carbon - Carbonization - Chemical activation - Electrolytes - Electron transport properties - Energy storage - Energy utilization - Lamellar structures - Nanosheets - Pore size - Pore structure - Potassium hydroxide - Sodium - Supercapacitor

摘要：Because of the special lamellar structure, numerous pores, and large effective specific surface area, the two-dimensional porous carbon material is very beneficial for the storage and transmission of energy. Herein, a facile method for preparing two-dimensional porous carbon nanosheets from sodium lignosulfonate with excellent electrochemical performance is reported. In this study, porous carbon nanosheets (PCNs) were obtained by the carbonization of the material, in which sodium lignosulfonate was coated on the boric acid surface, followed by activation by potassium hydroxide. By changing the thickness of the lamella structure and the subsequent activation process, the hierarchical pore structure was prepared in an effectively controlled manner. When the ratio of boric acid to sodium lignosulfonate was 4 : 1, the material possessed an ideal architecture and the best electrochemical performance. Porous carbon nanosheets with reasonable pore size distribution could increase the electron transfer rate between the electrolyte and the electrode material. The capacitance of PCN-4 was found to be 198 F g(-1) at 1 A g(-1) and could still maintain about 90% when the current density was increased to 20 A g(-1). In addition, excellent cycling stability was obtained, and the capacitance retention was more than 91% after 5000 cycles under 10 A g(-1). Thus, this research discovered a facile way to utilize sodium lignosulfonate, which is used for biomass conversion and renewable energy utilization.