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@ARTICLE{Yang:867205,
author = {Yang, Xiaofei and Gao, Xuejie and Sun, Qian and Jand, Sara
Panahian and Yu, Ying and Zhao, Yang and Li, Xia and Adair,
Keegan and Kuo, Liang‐Yin and Rohrer, Jochen and Liang,
Jianneng and Lin, Xiaoting and Banis, Mohammad Norouzi and
Hu, Yongfeng and Zhang, Hongzhang and Li, Xianfeng and Li,
Ruying and Zhang, Huamin and Kaghazchi, Payam and Sham,
Tsun‐Kong and Sun, Xueliang},
title = {{P}romoting the {T}ransformation of {L}i 2 {S} 2 to {L}i 2
{S}: {S}ignificantly {I}ncreasing {U}tilization of {A}ctive
{M}aterials for {H}igh‐{S}ulfur‐{L}oading {L}i–{S}
{B}atteries},
journal = {Advanced materials},
volume = {31},
number = {25},
issn = {1521-4095},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2019-06022},
pages = {1901220 -},
year = {2019},
abstract = {Lithium–sulfur (Li–S) batteries with high sulfur
loading are urgently required in order to take advantage of
their high theoretical energy density. Ether‐based Li–S
batteries involve sophisticated multistep
solid–liquid–solid–solid electrochemical reaction
mechanisms. Recently, studies on Li–S batteries have
widely focused on the initial solid (sulfur)–liquid
(soluble polysulfide)–solid (Li2S2) conversion reactions,
which contribute to the first $50\%$ of the theoretical
capacity of the Li–S batteries. Nonetheless, the sluggish
kinetics of the solid–solid conversion from solid‐state
intermediate product Li2S2 to the final discharge product
Li2S (corresponding to the last $50\%$ of the theoretical
capacity) leads to the premature end of discharge, resulting
in low discharge capacity output and low sulfur utilization.
To tackle the aforementioned issue, a catalyst of amorphous
cobalt sulfide (CoS3) is proposed to decrease the
dissociation energy of Li2S2 and propel the electrochemical
transformation of Li2S2 to Li2S. The CoS3 catalyst plays a
critical role in improving the sulfur utilization,
especially in high‐loading sulfur cathodes (3–10 mg
cm−2). Accordingly, the Li2S/Li2S2 ratio in the discharge
products increased to 5.60/1 from 1/1.63 with CoS3 catalyst,
resulting in a sulfur utilization increase of $20\%$ (335
mAh g−1) compared to the counterpart sulfur electrode
without CoS3.},
cin = {IEK-1},
ddc = {660},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {131 - Electrochemical Storage (POF3-131)},
pid = {G:(DE-HGF)POF3-131},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31062911},
UT = {WOS:000475269900023},
doi = {10.1002/adma.201901220},
url = {https://juser.fz-juelich.de/record/867205},
}