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One‐Pot Fabrication of Crumpled N‐Doped Graphene Anchored with Cobalt for High‐Performance Lithium–Sulfur Batteries
Author(s) -
Mao Wutao,
Ma Chao,
Ni Ping,
Li Maolong,
Ding Yiming,
Zhang Shaojie,
Pan Junli,
Cao Fengpu,
Bao Keyan
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202000182
Subject(s) - polysulfide , graphene , sulfur , materials science , cobalt , electrocatalyst , chemical engineering , lithium (medication) , cathode , battery (electricity) , redox , nanotechnology , inorganic chemistry , electrode , chemistry , electrochemistry , metallurgy , electrolyte , medicine , endocrinology , engineering , power (physics) , physics , quantum mechanics
The commercialization of sulfur batteries is hindered by a few inherent drawbacks. In this study, crumpled N‐doped graphene anchored with cobalt (Co‐NCG) was fabricated in one pot via a sample solvothermal method and applied to lithium‐sulfur (Li−S) batteries. The crumpled structure not only gives graphene a large specific surface area and abundant pores, but also endows graphene superb stability by preventing its restacking; these features are beneficial for loading and efficient utilization of sulfur. The lone pair electrons on the nitrogen atom underwent strong chemical interactions with Li ions, which lent the Co‐NCG/S material the ability to chemically immobilize polysulfide species. Cobalt acts as an electrocatalyst in the battery and kinetically accelerates sulfur redox reactions. As a result of these multifunctional arrangements, the Co‐NCG/S cathode showed excellent capacity retention and reaction kinetics and high sulfur loading capacity.