Universität zu Köln

Zhou, Kaiqiang, Qiu, Ruoxue, Zhen, Yichao, Huang, Zhigao, Mathur, Sanjay and Hong, Zhensheng (2021). Vitreum Etching-Assisted Fabrication of Porous Hollow Carbon Architectures for Enhanced Capacitive Sodium and Potassium-Ion Storage. Small, 17 (25). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1613-6829

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Abstract

Carbonaceous materials exhibit promising application in electrochemical energy storage especially for hollow or porous structure due to the fascinating and outstanding properties. Although there has been achieved good progress, controllable synthesis of hollow or porous carbons with uniform morphology by a green and easy way is still a challenge. Herein, a new artful and green approach is designed to controllably prepare hollow porous carbon materials with the assistance of boron oxide vitreum under a relatively low temperature of 500 degrees C. The vitreous B2O3 provides a flowing carbonization environment and acts as etching agent accompanying with boron doping. By this general strategy, hollow and porous carbon architectures with various morphology of spheres and hollow polyhedrons are successfully fabricated by metal organic framework (MOF) precursors. Furthermore, such hollow carbon materials exhibit considerably excellent Na+/K+ storage properties through enhanced capacitive behavior due to due to the highly porous structure and large surface area. It is notable that hollow carbon spheres display nearly 90% initial Coulombic efficiency, outstanding rate capability with 130 mAh g(-1) at 30 A g(-1) and long cycling life for sodium ion storage.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zhou, Kaiqiang UNSPECIFIED UNSPECIFIED UNSPECIFIED Qiu, Ruoxue UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhen, Yichao UNSPECIFIED UNSPECIFIED UNSPECIFIED Huang, Zhigao UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Hong, Zhensheng UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-578887
DOI:	10.1002/smll.202100538
Journal or Publication Title:	Small
Volume:	17
Number:	25
Date:	2021
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	1613-6829
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MESOPOROUS CARBON; GRAPHENE OXIDE; PERFORMANCE; ANODE; ELECTRODE; COST Multiple languages Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/57888