Universität zu Köln

Chen, Yang, Zhao, Si, Yu, Yueyue, Wei, Mingdeng, Mathur, Sanjay and Hong, Zhensheng (2022). A General Synthesis of Mesoporous Hollow Carbon Spheres with Extraordinary Sodium Storage Kinetics by Engineering Solvation Structure. Small, 18 (10). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1613-6829

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Abstract

Porous and hollow carbon materials have great superiority and prospects in electrochemical energy applications, especially for surface charge storage due to the high active surface. Herein, a general strategy is developed to synthesize mesoporous hollow carbon spheres (MHCS) with controllable texture and compositions by the synergistic effect of dopamine polymerization and metal catalysis (Cu, Bi, Zn). Mesoporous MHCS-Cu and MHCS-Bi are regular spheres, while mesoporous MHCS-Zn possesses an inward concave texture, and simultaneously has a very high surface area of 1675.5 m(2) g(-1) and lower oxygen content through the catalytic deoxygenation effect. MHCS-Zn displays an exceptional sodium storage kinetics and excellent long cycling life with 171.9 mAh g(-1) after 2500 cycles at 5 A g(-1) in compatible ether-based electrolytes. Such electrolyte enables enhanced solvated Na+ transport kinetics with appropriate electrostatic interactions at the surface of carbon anode as revealed by molecular dynamics simulations and molecular surface electrostatic potential calculations. Such an anode also displays basically constant capacity working at 0 degrees C, and still delivers 140 mAh g(-1) at 3 A g(-1) under -20 degrees C. Moreover, MHCS-Zn anode is coupled with Na3V2(PO4)(3) cathode to construct a hybrid capacitor, which exhibits a high energy density of 145 Wh Kg(-1) at a very high power of 8009 W kg(-1).

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Chen, Yang UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhao, Si UNSPECIFIED UNSPECIFIED UNSPECIFIED Yu, Yueyue UNSPECIFIED UNSPECIFIED UNSPECIFIED Wei, Mingdeng UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Hong, Zhensheng UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-583310
DOI:	10.1002/smll.202106513
Journal or Publication Title:	Small
Volume:	18
Number:	10
Date:	2022
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 LITHIUM-ION BATTERIES; MXENE ANODES; PERFORMANCE; CHALLENGES; SULFUR 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/58331