Open AccessA crisscross-like Fe2N-Ni4N heterostructure with both sulfiphilic and lithiophilic properties enabled high performance lithium-sulfur batteries
Author(s) -
Jintao Liu,
Jun Song Chen,
Xingquan Liu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/804/3/032039
Subject(s) - heterojunction , materials science , lithium (medication) , coating , homogeneous , hydrothermal circulation , carbon fibers , chemical engineering , deposition (geology) , sulfur , metal , energy storage , nanotechnology , optoelectronics , composite number , mathematics , composite material , metallurgy , biology , physics , paleontology , combinatorics , endocrinology , sediment , engineering , power (physics) , quantum mechanics
Li-S batteries have been recognized as one of the most promising candidates for next-generation energy storage systems, however, their practically commercialized applications are severely hindered by the shuttle effect of lithium polysulfides (LiPS S ), retarded conversion kinetics and the growth of lithium dendrites. Herein, a vertically growing layered NiFe-LDH derived Ni 4 N-Fe 2 N heterostructure cross-like nanoarrays on a carbon cloth (CC) (denoted as CC@Ni 4 N-Fe 2 N@C) was constructed by a pot of hydrothermal method followed by the subsequent carbon coating and nitridation processes to synchronously tackle the above challenges related to Li-S batteries. This heterostructure presents good sulfiphilic and lithiophilic properties and can be directly used as the host materials both for S and Li. As-expected, this heterostructure exhibits the significantly improved discharge specific capacity, rate performance and cycle stability compared with the single-metal nitrides (CC@Ni 4 N@C and CC@Fe 2 N@C). The study of the symmetric cells certifies that this heterostructure can expose the abundant lithiophilic active sites to achieve the homogeneous Li deposition and effectively suppress the growth of Li dendrites.