TY - JOUR
T1 - Subnanometer MoP clusters confined in mesoporous carbon (CMK-3) as superior electrocatalytic sulfur hosts for high-performance lithium-sulfur batteries
AU - Wang, Lei
AU - Li, Xiaofang
AU - Zhang, Yingxi
AU - Mao, Weijian
AU - Li, Yuanyuan
AU - Chu, Paul K.
AU - Kızılaslan, Abdulkadir
AU - Zheng, Zijian
AU - Huo, Kaifu
N1 - Funding Information:
The authors acknowledge the financial support from National Natural Science Foundation of China ( U2004210 , 21875080 , 51572100 ), Innovative Research Group Project of the Natural Science Foundation of Hubei Province (2019CFA020), Shenzhen Municipal Science and Technology Innovation Commission (JCYJ20210324141613032, A0030246), Key Scientific Research Projects of Colleges and Universities in Henan Province (19A430029) and City University of Hong Kong Strategic Research Grant (7005505). The authors are grateful for the facility support provided by the Analytical and Testing Center of HUST and Materials Research Center (MRC) in PolyU.
Funding Information:
The authors acknowledge the financial support from National Natural Science Foundation of China (U2004210, 21875080, 51572100), Innovative Research Group Project of the Natural Science Foundation of Hubei Province (2019CFA020), Shenzhen Municipal Science and Technology Innovation Commission (JCYJ20210324141613032, A0030246), Key Scientific Research Projects of Colleges and Universities in Henan Province (19A430029) and City University of Hong Kong Strategic Research Grant (7005505). The authors are grateful for the facility support provided by the Analytical and Testing Center of HUST and Materials Research Center (MRC) in PolyU.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/10/15
Y1 - 2022/10/15
N2 - 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.
AB - 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.
KW - CMK-3
KW - Confined catalytic effect
KW - Lithium polysulfides
KW - Lithium-sulfur battery
KW - Molybdenum phosphide
UR - http://www.scopus.com/inward/record.url?scp=85130524782&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2022.137050
DO - 10.1016/j.cej.2022.137050
M3 - Journal article
AN - SCOPUS:85130524782
SN - 1385-8947
VL - 446
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 137050
ER -