Synthesis of nitrogen doped hierarchically porous carbon nanosheets for supercapacitor by mixed salt template

被引：0

作者：

Jiao S. ^{[1
]}

Yang L. ^{[1
]}

Wu T. ^{[1
]}

Li H. ^{[1
]}

Lyu H. ^{[1
]}

He X. ^{[1
]}

机构：

[1] School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan

来源：

Huagong Xuebao/CIESC Journal | 2021年 / 72卷 / 05期

关键词：

Acid-free and base-free technique; Activated carbon; Activation; Electrochemistry; Supercapacitor;

D O I：

10.11949/0438-1157.20201320

中图分类号：

学科分类号：

摘要：

Hierarchically porous carbons have shown great potential in the fields of electrochemical energy storage. The template strategy coupled with activation technique is considered as one of the most effective ways to produce hierarchically porous carbon. However, this method uses strong acids and strong bases, causing pollution to the environment. Therefore, it is urgent to develop an acid-free and base-free technique to prepare hierarchically porous carbons. Herein, nitrogen doped hierarchically porous carbon nanosheets (NHCNs) are synthesized from cal tar pitch by using the mixture salt of NaCl and Na2CO3 as template coupled with K2CO3 activation. The templates and activators can be removed by water washing without the use of strong acids and bases, and this work provides an acid-free and base-free technique for synthesizing hierarchically porous carbon nanosheets. The as-made NHCNs possess high specific surface area (1597 m2•g-1), abundant micro-/mesopores together with a moderate content of O, N heteroatom. These unique structures give NHCNs electrodes excellent supercapacitor performance. In the KOH electrolyte, NHCNs electrodes show high specific capacitance and good cycle stability. © 2021, Editorial Board of CIESC Journal. All right reserved.

引用

页码：2869 / 2877

页数：8

共 40 条

[1]

Banham D, Choi J Y, Kishimoto T, Et al., Integrating PGM-free catalysts into catalyst layers and proton exchange membrane fuel cell devices, Advanced Materials, 31, 31, (2019)

[2]

Sun N, Zhu Q Z, Anasori B, Et al., MXene-bonded flexible hard carbon film as anode for stable Na/K-ion storage, Advanced Functional Materials, 29, 51, (2019)

[3]

Liu T, Zhang F, Song Y, Et al., Revitalizing carbon supercapacitor electrodes with hierarchical porous structures, Journal of Materials Chemistry A, 5, 34, pp. 17705-17733, (2017)

[4]

Fang K, Liu D, Xiang X Y, Et al., Air-stable red phosphorus anode for potassium/sodium-ion batteries enabled through dual-protection design, Nano Energy, 69, (2020)

[5]

She Z M, Ghosh D, Pope M A., Decorating graphene oxide with ionic liquid nanodroplets: an approach leading to energy-dense, high-voltage supercapacitors, ACS Nano, 11, 10, pp. 10077-10087, (2017)

[6]

Jayaramulu K, Dubal D P, Nagar B, Et al., Ultrathin hierarchical porous carbon nanosheets for high-performance supercapacitors and redox electrolyte energy storage, Advanced Materials, 30, 15, (2018)

[7]

Wang Y G, Song Y F, Xia Y Y., Electrochemical capacitors: mechanism, materials, systems, characterization and applications, Chemical Society Reviews, 45, 21, pp. 5925-5950, (2016)

[8]

He X J, Ling P H, Qiu J S, Et al., Efficient preparation of biomass-based mesoporous carbons for supercapacitors with both high energy density and high power density, Journal of Power Sources, 240, pp. 109-113, (2013)

[9]

Li J H, Liu Z C, Zhang Q B, Et al., Anion and cation substitution in transition-metal oxides nanosheets for high-performance hybrid supercapacitors, Nano Energy, 57, pp. 22-33, (2019)

[10]

Fu L J, Qu Q T, Holze R, Et al., Composites of metal oxides and intrinsically conducting polymers as supercapacitor electrode materials: the best of both worlds?, Journal of Materials Chemistry A, 7, 25, pp. 14937-14970, (2019)

← 1 2 3 4 →