In:
ChemistrySelect, Wiley, Vol. 3, No. 14 ( 2018-04-17), p. 3952-3957
Abstract:
Li‐sulfur batteries possess many advantages, such as high theoretical capacities, high energy densities, environmental benignity and natural abundance of sulfur with a high theoretical capacity of 1672 mAh⋅g −1 . However, their commercialization has been hindered due to many prevailing issues, including the poor electrical conductivity of sulfur and the high solubility of polysulfide intermediates. We report a facile and scalable, solution‐based spray drying technique to synthesize hollow N‐doped mesoporous carbon microspheres (HNMCMs) with an exceptionally large surface area of 872 m 2 ⋅g −1 using outdated dairy products as carbon source. The novel electrode prepared from a high loading of sulfur accommodated by the HNMCM hosts delivers high initial discharge capacities of 781 and 682 mAh⋅g −1 at 0.5 and 1 C, respectively. It was further obtained that the capability retention can be retained as high as 79.4% at 1 C after 400 cycles. The excellent cyclic stability and rate capability of the HNMCM/S cathode can be ascribed to the large surface area, high electrical conductivity enhanced by the high content of doped nitrogen and unique hollow microsphere structure of HNMCMs.
Type of Medium:
Online Resource
ISSN:
2365-6549
,
2365-6549
DOI:
10.1002/slct.201703038
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
2844262-3
