Metal-organic frameworks-derived carbon modified wood carbon monoliths as three-dimensional self-supported electrodes with boosted electrochemical energy storage performance

Peng Song; Caixia Chen; Xiaoping Shen; Shiping Zeng; S Premlatha; Zhenyuan Ji; Linzhi Zhai; Aihua Yuan; Qi Liu

doi:10.1016/j.jcis.2022.04.048

Metal-organic frameworks-derived carbon modified wood carbon monoliths as three-dimensional self-supported electrodes with boosted electrochemical energy storage performance

J Colloid Interface Sci. 2022 Aug 15:620:376-387. doi: 10.1016/j.jcis.2022.04.048. Epub 2022 Apr 11.

Authors

Peng Song¹, Caixia Chen¹, Xiaoping Shen², Shiping Zeng¹, S Premlatha¹, Zhenyuan Ji¹, Linzhi Zhai³, Aihua Yuan³, Qi Liu⁴

Affiliations

¹ School of Material Science & Engineering, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
² School of Material Science & Engineering, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China. Electronic address: xiaopingshen@163.com.
³ School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China.
⁴ Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, and Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, PR China.

PMID: 35436619
DOI: 10.1016/j.jcis.2022.04.048

Abstract

Wood-derived carbon monoliths, in recent years, have attracted tremendous interest in the field of energy storage, but their electrochemical characteristics are still far from satisfactory. Here, we report a universal and efficient approach for the preparation of structure-engineered, heteroatom-functionalized and property-boosted wood carbons. A two-step ion-exchange process greatly enriches the nucleation sites of ZIF-8 on the inner wall of wood tracheids, hence leading to a unique carbon/carbon heterostructure after carbonizing and acid-washing. Particularly, the prepared NPCM-900 with a large specific surface area of 708.2 m² g^-1, a hierarchical porous architecture and a suitable N content of 2.3% delivers an ultrahigh area-normalized specific capacitance of 23.7 F cm^-2 at 5 mA cm^-2, which stands for a new capacitive record among the wood-based binder-free electrodes. The NPCM-900//NPCM-900 all-solid-state supercapacitor has an admirable energy density of 9.3 Wh m^-2 at 24.9 W m^-2 and a large power density of 248.3 W m^-2 at 4.8 Wh m^-2, while the NPCM-900 based Zn-ion hybrid supercapacitor (NPCM-900//Zn) exhibits a superior energy density of 12.7 Wh m^-2. Furthermore, the NPCM-900//NPCM-900 and NPCM-900//Zn present great stabilities with capacitance retentions of 87% and 85%, respectively, after 5000 cycles. These parameters notably outperform those of most wood-based supercapacitors, endowing the NPCM-900 with extensive prospects for practical use.

Keywords: Carbon monoliths; Energy storage; Preparation; Wood; ZIF-8.