TY  - JOUR
AU  - Li, Mengyao
AU  - Yang, Dawei
AU  - Biendicho, Jordi Jacas
AU  - Han, Xu
AU  - Zhang, Chaoqi
AU  - Liu, Kun
AU  - Diao, Jiefeng
AU  - Li, Junshan
AU  - Wang, Jing
AU  - Heggen, Marc
AU  - Dunin-Borkowski, Rafal E.
AU  - Wang, Jiaao
AU  - Henkelman, Graeme
AU  - Morante, Joan Ramon
AU  - Arbiol, Jordi
AU  - Chou, Shu-Lei
AU  - Cabot, Andreu
TI  - Enhanced Polysulfide Conversion with Highly Conductive and Electrocatalytic Iodine‐Doped Bismuth Selenide Nanosheets in Lithium–Sulfur Batteries
JO  - Advanced functional materials
VL  - 32
IS  - 26
SN  - 1057-9257
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2022-02171
SP  - 2200529 -
PY  - 2022
AB  - The shuttling behavior and sluggish conversion kinetics of intermediate lithium polysulfides (LiPS) represent the main obstacles to the practical application of lithium–sulfur batteries (LSBs). Herein, an innovative sulfur host is proposed, based on an iodine-doped bismuth selenide (I-Bi2Se3), able to solve these limitations by immobilizing the LiPS and catalytically activating the redox conversion at the cathode. The synthesis of I-Bi2Se3 nanosheets is detailed here and their morphology, crystal structure, and composition are thoroughly. Density-functional theory and experimental tools are used to demonstrate that I-Bi2Se3 nanosheets are characterized by a proper composition and micro- and nano-structure to facilitate Li+ diffusion and fast electron transportation, and to provide numerous surface sites with strong LiPS adsorbability and extraordinary catalytic activity. Overall, I-Bi2Se3/S electrodes exhibit outstanding initial capacities up to 1500 mAh g−1 at 0.1 C and cycling stability over 1000 cycles, with an average capacity decay rate of only 0.012% per cycle at 1 C. Besides, at a sulfur loading of 5.2 mg cm−2, a high areal capacity of 5.70 mAh cm−2 at 0.1 C is obtained with an electrolyte/sulfur ratio of 12 µL mg−1. This work demonstrated that doping is an effective way to optimize the metal selenide catalysts in LSBs.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000772014800001
DO  - DOI:10.1002/adfm.202200529
UR  - https://juser.fz-juelich.de/record/907708
ER  -