TY - JOUR
T1 - Rational Construction of Sulfur-Deficient NiCo2S4- xHollow Microspheres as an Effective Polysulfide Immobilizer toward High-Performance Lithium/Sulfur Batteries
AU - Wang, Wenjuan
AU - Li, Jing
AU - Jin, Qianwen
AU - Liu, Yanyu
AU - Zhang, Yongguang
AU - Zhao, Yan
AU - Wang, Xin
AU - Nurpeissova, Arailym
AU - Bakenov, Zhumabay
N1 - Funding Information:
The authors acknowledge support from Natural Science Foundation of Hebei Province of China (B2019202277 and B2020202052); State Key Laboratory of Reliability and Intelligence of Electrical Equipment (no. EERI_PI2020007), Hebei University of Technology, China; the Program for the Outstanding Young Talents of Hebei Province, China (Y.Z.); Chunhui Project of Ministry of Education of the People’s Republic of China (grant no. Z2017010); Xijiang R&D Team (X.W.); Department of Science and Technology of Guangdong Province 2020B0909030004 (X.W.); Guangdong Innovative and Entrepreneurial Team Program (no. 2016ZT06C517); Science and Technology Program of Guangzhou (no. 2019050001); Science and Technology Program of Zhaoqing (no. 2019K038); the Program Targeted Funding #BR05236524 from the Ministry of Education and Science of the Republic of Kazakhstan; and a research grant #091019CRP2114 from Nazarbayev University.
Publisher Copyright:
© 2020 American Chemical Society. All rights reserved.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021
Y1 - 2021
N2 - The synergistic strategy combining architectural design with defect engineering in transition-metal sulfides offers a promising opportunity to realize high-efficiency polysulfide adsorption/conversion surface catalysis in lithium/sulfur (Li/S) batteries. Here, defect-rich yolk-shell hollow spheres composed of ultrafine NiCo2S4-x nanoparticles as sulfur hosts prepared by an anion-exchange method are reported. The elaborate design of sulfur defects endows the NiCo2S4-x hollow spheres with significantly enhanced electronic conductivity and superior affinity for polysulfides as well as expedited sulfur conversion. Meanwhile, the unique yolk-shell NiCo2S4-x hollow sphere structure provides large cavities that not only increase sulfur storage but also relieve the electrode volume expansion during cycling. Combining these favorable features, the NiCo2S4-x-hosted sulfur cathode revealed enhanced cycling stability, corresponding to a negligible capacity fading rate of 0.0754% per cycle after 500 cycles at 1 C, and achieved an outstanding rate capability (628.9 mAh g-1 up to 5 C).
AB - The synergistic strategy combining architectural design with defect engineering in transition-metal sulfides offers a promising opportunity to realize high-efficiency polysulfide adsorption/conversion surface catalysis in lithium/sulfur (Li/S) batteries. Here, defect-rich yolk-shell hollow spheres composed of ultrafine NiCo2S4-x nanoparticles as sulfur hosts prepared by an anion-exchange method are reported. The elaborate design of sulfur defects endows the NiCo2S4-x hollow spheres with significantly enhanced electronic conductivity and superior affinity for polysulfides as well as expedited sulfur conversion. Meanwhile, the unique yolk-shell NiCo2S4-x hollow sphere structure provides large cavities that not only increase sulfur storage but also relieve the electrode volume expansion during cycling. Combining these favorable features, the NiCo2S4-x-hosted sulfur cathode revealed enhanced cycling stability, corresponding to a negligible capacity fading rate of 0.0754% per cycle after 500 cycles at 1 C, and achieved an outstanding rate capability (628.9 mAh g-1 up to 5 C).
KW - catalytic effect
KW - cathode
KW - high conductivity
KW - lithium/sulfur batteries
KW - sulfur vacancy
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U2 - 10.1021/acsaem.0c02839
DO - 10.1021/acsaem.0c02839
M3 - Article
AN - SCOPUS:85101661428
VL - 4
SP - 1687
EP - 1695
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
SN - 2574-0962
IS - 2
ER -