In:
ChemSusChem, Wiley, Vol. 10, No. 10 ( 2017-05-22), p. 2235-2241
Abstract:
A rod‐like Cu 2− x Se is synthesized by a facile water evaporation process. The electrochemical reaction mechanism is investigated by ex situ X‐ray diffraction (XRD). By adopting an ether‐based electrolyte instead of a carbonate‐based electrolyte, the electrochemical performance of Cu 2− x Se electrodes improved significantly. The Cu 2− x Se electrodes exhibit outstanding cycle performance: after 1000 cycles, 160 mA h g −1 can be maintained with a retention of 80.3 %. At current densities of 100, 200, 500, and 1000 mA g −1 , the capacity of a Cu 2− x Se/Li battery was 208, 202, 200, and 198 mA h g −1 , respectively, showing excellent rate capability. The 4‐probe conductivity measurements along with electrochemical impendence spectroscopy (EIS) and cyclic voltammetry (CV) tests illustrate that the Cu 2− x Se electrodes display high specific conductivity and impressive lithium–ion diffusion rate, which makes the Cu 2− x Se a promising anode material for lithium–ion batteries.
Type of Medium:
Online Resource
ISSN:
1864-5631
,
1864-564X
DOI:
10.1002/cssc.201700317
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
2411405-4
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