Universität zu Köln

Zhen, Yichao, Sa, Rongjian ORCID: 0000-0002-8515-2438, Zhou, Kaiqiang, Ding, Lingyi, Chen, Yang, Mathur, Sanjay ORCID: 0000-0003-2765-2693 and Hong, Zhensheng (2020). Breaking the limitation of sodium-ion storage for nanostructured carbon anode by engineering desolvation barrier with neat electrolytes. Nano Energy, 74. AMSTERDAM: ELSEVIER. ISSN 2211-3282

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Abstract

In the past, most of the studies monotonously focused on developing electrode materials for sodium ion batteries (SIBs), while the compatibility effects and mechanism of electrolytes with material microstructures on the sodiation behavior are barely involved. Here, we demonstrate the sodium-ion storage behavior of carbon anode in neat ether electrolytes with outstanding ion diffusion kinetics at electrode surface that breaks its innate limitation. Porous nanocarbon with small interlayer spacing but very high surface area exhibits a record high ICE over 91.1% and exceptional rate capability for Na-ion storage in ether -based electrolytes. This is due to the remarkably reduced Na thorn desolvation barrier in ether electrolytes (-94.6 meV) that is less than one-third of that in ester electrolytes (-307.8 meV). The strong interaction of Na-ions with ester electrolytes and their decom- position on electrode surface can be suppressed by adopting ether solvents owing to lower Gibbs free energies of solvation and Na thorn desolvation energy as revealed by DFT calculations. For electrode materials working with ether electrolytes, a large surface area is critical for better electrochemical performance. This study provides a reliable regulation parameter for tailoring electrolytes with materials that offers promising potential for nano - structured materials toward high -rate rechargeable devices.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zhen, Yichao UNSPECIFIED UNSPECIFIED UNSPECIFIED Sa, Rongjian UNSPECIFIED orcid.org/0000-0002-8515-2438 UNSPECIFIED Zhou, Kaiqiang UNSPECIFIED UNSPECIFIED UNSPECIFIED Ding, Lingyi UNSPECIFIED UNSPECIFIED UNSPECIFIED Chen, Yang UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED orcid.org/0000-0003-2765-2693 UNSPECIFIED Hong, Zhensheng UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-325362
DOI:	10.1016/j.nanoen.2020.104895
Journal or Publication Title:	Nano Energy
Volume:	74
Date:	2020
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	2211-3282
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HIGH-PERFORMANCE; RATE CAPABILITY; DOPED GRAPHENE; ENERGY-STORAGE; HIGH-CAPACITY; LOW-COST; BATTERIES; NA; INTERPHASE; OXIDE Multiple languages Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/32536