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Confining Sulfur in N‐Doped Hollow Porous Carbon Spheres for Improved Lithium‐Sulfur Batteries
Author(s) -
Xiao Yingbo,
Guo Sijia,
Li Dixiong,
Wang Jia,
Li Xin,
Ouyang Yuan,
Zeng Qinghan,
He Wenchao,
Zhang Qi,
Huang Shaoming
Publication year - 2021
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.202000404
Subject(s) - sulfur , materials science , porosity , adsorption , chemical engineering , carbon fibers , cathode , lithium (medication) , doping , redox , nanotechnology , inorganic chemistry , chemistry , composite material , composite number , organic chemistry , metallurgy , optoelectronics , medicine , engineering , endocrinology
Abstract Rationally designing sulfur host which allows fast redox kinetics and can confine soluble polysulfides (PSs) is crucial for high‐performance lithium‐sulfur batteries (LSBs). Herein, N‐doped hollow porous carbon spheres (NHPCS) with large specific surface area (1526 m 2 g −1 ) and strong interaction toward PSs were fabricated by a template method and applied as an efficient sulfur host. Benefiting from the hollow porous structure and function design, the NHPCS shows a high sulfur loading of 78.9 wt.% and improved adsorption capacity for PSs. Finally, the LSBs with the S@NHPCS as the cathode exhibit higher initial capacity of 1263 mAh g −1 at 0.2 C and lower decay rate (0.07 % per cycle) than S@CNT after 500 cycles at 1 C.