Oxygen defect-rich MnOOH nanorod as an effective modulator to boost polysulfide reaction kinetic for high-performance lithium sulfur battery

To boost the LiPSs conversion reaction for developing the high-performance lithium sulfur battery, the suitable catalyst of LiPSs redox is necessary. Herein, we designed the oxygen defect-rich MnOOH-3 nanorod as an effective modulator to regulate the LiPSs redox kinetics successfully. As a result, the derived CNT/MnOOH-3 film with successful LiPSs restriction/conversion and electron conductivity can be regarded as the superior interlayer for advanced lithium sulfur battery. After 250 cycles, the sulfur cathode with CNT/MnOOH-3 interlayer could deliver the discharge capacity of 736.9 mAh/g with a capacity retention ratio of 82.3%, which is higher than the cathodes with other interlayers. This result confirms that defect engineering is a promising strategy to prepare the potent catalytic additive for lithium sulfur battery.

Automated summary

In order to improve the conversion reaction of LiPSs and develop high-performance lithium sulfur batteries, a suitable catalyst for LiPSs redox is necessary. In this study, a oxygen defect-rich MnOOH-3 nanorod was designed as an effective modulator to successfully regulate the LiPSs redox kinetics. The derived CNT/MnOOH-3 film showed excellent LiPSs restriction/conversion and electron conductivity, making it a superior interlayer for advanced lithium sulfur batteries. After 250 cycles, the sulfur cathode with CNT/MnOOH-3 interlayer delivered a discharge capacity of 736.9 mAh/g with a capacity retention ratio of 82.3%, higher than cathodes with other interlayers. This result confirms that defect engineering is a promising strategy for preparing potent catalytic additives for lithium sulfur batteries.