3D hierarchical porous N, O co-doped carbon derived from the waste walnut shell via one-step carbonization for high-performance supercapacitor

被引：5

作者：

Liu, Zhentao ^{[1
]}

Li, Linsong ^{[1
]}

Wang, Meilong ^{[1
]}

Wu, Fuzhong ^{[1
]}

Jin, Huixin ^{[1
,3
]}

Wang, Yi ^{[2
,4
]}

机构：

[1] Guizhou Univ, Coll Mat & Met, Guiyang, Peoples R China

[2] Guiyang Univ, Coll Chem & Mat Engn, Guiyang, Peoples R China

[3] Guizhou Univ, Coll Mat & Met, Guiyang 550005, Peoples R China

[4] Guiyang Univ, Coll Chem & Mat Engn, Guiyang 550005, Peoples R China

来源：

ELECTROANALYSIS | 2024年 / 36卷 / 07期

基金：

中国国家自然科学基金;

关键词：

biomass waste; N; O co-doped biomass carbon; one-step carbonization; supercapacitor; 3D hierarchical porous; SURFACE-AREA; BIOMASS; NANOMATERIALS; ELECTRODES; LIGNIN; PORES;

D O I：

10.1002/elan.202400002

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Porous carbon derived from biomass is considered a promising material for supercapacitors. However, improving the wettability and electrical conductivity of porous carbon materials remains a great challenge. Herein, a bidirectional pore-creating strategy is proposed to construct N/O-doped Walnut-shells-based hierarchical porous carbon materials (WSC-N/O-900). The high specific surface area (981 m2 g-1) and heteroatom content of WSC-N/O-900 enhance the wettability and electrical conductivity. Thus, WSC-N/O-900 shows a high capacitance of 431 F g-1 at 1.0 A g-1. Additionally, the capacitance retention rate of WSC-N/O-900//WSC-N/O-900 (SSC) remains 88.4 % after 9000 cycles and achieves an energy density of 14.8 Wh kg-1 with a power density of 300 W kg-1. Overall, this work can provide an effective strategy to prepare advanced biomass derived porous carbon for electrochemical energy storage. image

引用

页数：11

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