Details

Autor(en) / Beteiligte

• Chen, Ze
• Ye, Sunjie
• Evans, Stephen D.
• Ge, Yuanhang
• Zhu, Zhifeng
• Tu, Yingfeng
• Yang, Xiaoming

Titel

Confined Assembly of Hollow Carbon Spheres in Carbonaceous Nanotube: A Spheres‐in‐Tube Carbon Nanostructure with Hierarchical Porosity for High‐Performance Supercapacitor

Ist Teil von

• Small (Weinheim an der Bergstrasse, Germany), 2018-05, Vol.14 (19), p.e1704015-n/a

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2018

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• Carbonaceous nanotubes (CTs) represent one of the most popular and effective carbon electrode materials for supercapacitors, but the electrochemistry performance of CTs is largely limited by their relatively low specific surface area, insufficient usage of intratube cavity, low content of heteroatom, and poor porosity. An emerging strategy for circumventing these issues is to design novel porous CT‐based nanostructures. Herein, a spheres‐in‐tube nanostructure with hierarchical porosity is successfully engineered, by encapsulating heteroatom‐doping hollow carbon spheres into one carbonaceous nanotube (HCSs@CT). This intriguing nanoarchitecture integrates the merits of large specific surface area, good porosity, and high content of heteroatoms, which synergistically facilitates the transportation and exchange of ions and electrons. Accordingly, the as‐prepared HCSs@CTs possess outstanding performances as electrode materials of supercapacitors, including superior capacitance to that of CTs, HCSs, and their mixtures, coupled with excellent cycling life, demonstrating great potential for applications in energy storage. A confined assembly of hollow carbon spheres in carbonaceous nanotube (HCSs@CT) is prepared by facile confined assembly. The novel spheres‐in‐tube structure with hierarchical pores and large specific surface area facilitates the transport and storage of the charges. Thus, HCSs@CTs possess a great supercapacitance performance including higher capacitance than CTs, HCSs, and their mixtures, combined with excellent cycling life.