NiS/NiCo2O4 Cooperative Interfaces Enable Fast Sulfur Redox Kinetics for Lithium–Sulfur Battery

Author:

Deng Yirui1,Yang Jin‐Lin2ORCID,Qiu Zixuan1,Tang Wenhao1,Li Yanan1,Wang Qi1,Liu Ruiping1ORCID

Affiliation:

1. School of Chemical & Environmental Engineering China University of Mining & Technology (Beijing) Beijing 100083 P. R. China

2. School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore

Abstract

AbstractDue to their high energy density and cost‐effectiveness, lithium–sulfur batteries (LSBs) are considered highly promising for the next generation of energy storage technologies. However, the soluble lithium‐polysulfides (LiPSs) notorious for causing the shuttle effect and the sluggish redox kinetics have hindered their practical commercialization. To tackle these challenges, a heterostructural catalyst featuring NiS‐NiCo2O4 interfaces is developed, which serves as an interlayer for LSBs. These interfacial sites leverage the advantages of polar NiCo2O4 and conductive NiS, enabling smooth Li+ diffusion, rapid electron transport, and effective immobilization of LiPSs. This synergistic approach promotes the conversion of sulfur species, resulting in a high discharge capacity of 526 mAh g−1 at 3 C for cells with the NiS‐NiCo2O4 interlayer. Additionally, remarkable cycling stability is achievable with an areal sulfur loading of ≈5.0 mg cm−2. It is believed that this research paves the way for practical applications of LSBs.

Funder

National Natural Science Foundation of China

China Scholarship Council

Beijing Nova Program

Publisher

Wiley

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