DataVXACS Applied Energy MaterialsPaper
journal article·2021-02-22

Rational Construction of Sulfur-Deficient NiCo2S4–x Hollow Microspheres as an Effective Polysulfide Immobilizer toward High-Performance Lithium/Sulfur Batteries

Wenjuan Wang, Jing Li, Qianwen Jin, Yanyu Liu, Yongguang Zhang, Yan Zhao, Xin Wang, Arailym Nurpeissova, Zhumabay Bakenov

ACS Applied Energy Materials· Volume 4· Issue 2
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Source abstract

Abstract

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).
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storageNanomaterialsCatalysis & surfaces

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China

South China Academy of Advanced Optoelectronics & International Academy of Optoelectronics at Zhaoqing, South China Normal University, Guangzhou 510006, China

Department of Chemical and Materials Engineering, National Laboratory Astana, Nazarbayev University, Institute of Batteries LLP, Nur-Sultan 010000, Kazakhstan

Funding

Ministry of Education of the People's Republic of China · Ministry of Education and Science of the Republic of Kazakhstan · National Natural Science Foundation of China · Hebei University of Technology · Nazarbayev University · Guangdong Province · Xijiang R&D Team · Science and Technology Program of Guangzhou · State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology · Zhaoqing Municipal Science and Technology Bureau · Hebei Province

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