Volume 17, Issue 52 2104613
Research Article

In Situ Electrochemical Activation Derived LixMoOy Nanorods as the Multifunctional Interlayer for Fast Kinetics Li-S batteries

Tengyu Li

Tengyu Li

Department of Materials Science and Engineering, China University of Mining and Technology (Beijing), Beijing, 100083 P. R. China

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Yanan Li

Yanan Li

Department of Materials Science and Engineering, China University of Mining and Technology (Beijing), Beijing, 100083 P. R. China

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Jinlin Yang

Jinlin Yang

School of Materials Science and Engineering, Tsinghua University, Beijing, 100083 P. R. China

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Yirui Deng

Yirui Deng

Department of Materials Science and Engineering, China University of Mining and Technology (Beijing), Beijing, 100083 P. R. China

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Mengwei Wu

Mengwei Wu

Department of Materials Science and Engineering, China University of Mining and Technology (Beijing), Beijing, 100083 P. R. China

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Qi Wang

Qi Wang

Department of Materials Science and Engineering, China University of Mining and Technology (Beijing), Beijing, 100083 P. R. China

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Ruiping Liu

Corresponding Author

Ruiping Liu

Department of Materials Science and Engineering, China University of Mining and Technology (Beijing), Beijing, 100083 P. R. China

E-mail: [email protected], [email protected], [email protected]

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Ben Ge

Corresponding Author

Ben Ge

Department of Materials Science and Engineering, China University of Mining and Technology (Beijing), Beijing, 100083 P. R. China

E-mail: [email protected], [email protected], [email protected]

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Xiaokun Xie

Xiaokun Xie

Department of Materials Science and Engineering, China University of Mining and Technology (Beijing), Beijing, 100083 P. R. China

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Jianmin Ma

Corresponding Author

Jianmin Ma

School of Physics and Electronics, Hunan University, Changsha, 410082 China

School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731 China

E-mail: [email protected], [email protected], [email protected]

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First published: 12 November 2021
Citations: 14

Abstract

Li-S batteries (LSBs) have attracted worldwide attention owing to their characteristics of high theoretical energy density and low cost. However, the commercial promotion of LSBs is hindered by the irreversible capacity decay and short cycling life caused by the shuttle effect of lithium-polysulfides (LiPSs). Herein, a hybrid interlayer consisting of MoO3, conductive Ni foam, and Super P is prepared to prevent the shuttle effect and catalyze the LiPSs conversion. MoO3 with a reversible lithiation/delithiation behavior between Li0.042MoO3 and Li2MoO4 within 1.7–2.8 V versus Li/Li+ combines the Li+ insertion and LiPSs immobilization and efficiently improve the LSBs redox kinetics. Benefiting from the reversible Li+ insertion/extraction in lithium molybdate (LixMoOy) and the highly conductive Ni foam substrate, the sulfur cathode coupled with such electrochemical activation derived catalytic interlayer exhibits a high initial discharge capacity of 1100.1 mAh g−1 at a current density of 1 C with a low decay rate of 0.09% cycle−1. Good capacity retention can still be obtained even the areal sulfur loading is increased to 13.28 mg cm−2.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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