Subnanometer MoP clusters confined in mesoporous carbon (CMK-3) as superior electrocatalytic sulfur hosts for high-performance lithium-sulfur batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Lei Wang
  • Xiaofang Li
  • Weijian Mao
  • Yuanyuan Li
  • Abdulkadir Kızılaslan
  • Zijian Zheng
  • Kaifu Huo

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number137050
Journal / PublicationChemical Engineering Journal
Volume446
Online published17 May 2022
Publication statusOnline published - 17 May 2022

Abstract

Lithium-sulfur (Li-S) batteries are promising high-energy–density storage devices but severe shuttling of lithium polysulfides (LPSs), low sulfur utilization and sluggish reaction kinetics impede the practical applications. Herein, we report MoP clusters embedded in CMK-3 (cMoP-CMK-3) as a lightweight, conductive, and catalytic cathodic host with large sulfur mass loading for high energy Li-S batteries. The electronically conductive CMK-3 with ordered mesoporous channels could accommodate high loading and expansion of the active sulfur material and facilitate fast ionic/electronic transportation. The strong interaction between cMoP and CMK-3 results in concentrated Li ions inside the channels due to enhanced local electric field, significantly eliminating dead sulfur and improving sulfur utilization to over 90% due to confined catalytic effect. Moreover, the cMoP embedded into channels provide rich adsorptive and catalytic sites to effectively trap LPSs, and catalytically accelerate reaction kinetics. The resulting S@cMoP-CMK-3 cathode shows a large capacity of 1100 mAh g−1 at 0.5C (1C = 1675 mA g−1) based on the total mass of cathode, high-rate capacity of 767.8 mAh g−1 at 5C, and excellent cycle stability with 0.02% capacity fade per cycle over 500 cycles at 2C. This work demonstrates a confined catalytic strategy to improve the sulfur utilization for high-energy Li-S batteries.

Research Area(s)

  • CMK-3, Confined catalytic effect, Lithium polysulfides, Lithium-sulfur battery, Molybdenum phosphide

Citation Format(s)

Subnanometer MoP clusters confined in mesoporous carbon (CMK-3) as superior electrocatalytic sulfur hosts for high-performance lithium-sulfur batteries. / Wang, Lei; Li, Xiaofang; Zhang, Yingxi; Mao, Weijian; Li, Yuanyuan; Chu, Paul K.; Kızılaslan, Abdulkadir; Zheng, Zijian; Huo, Kaifu.

In: Chemical Engineering Journal, Vol. 446, 137050, 15.10.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review