首页|Cage-confinement synthesis of MoC nanoclusers as efficient sulfiphilic and lithiophilic regulator for superior Li-S batteries

Cage-confinement synthesis of MoC nanoclusers as efficient sulfiphilic and lithiophilic regulator for superior Li-S batteries

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High-energy-density Li-S batteries are sub-jected to serious sulfur deactivation and short cycle lifetime caused by undesirable polysulfide shuttle effect and frantic lithium dendrite formation.In this work,a controllable cage-confinement strategy to fabricate molybdenum car-bide(MoC)nanoclusters as a high-efficient sulfiphilic and lithiophilic regulator to mitigate the formidable issues of Li-S batteries is demonstrated.The sub-2 nm MoC nan-oclusters not only guarantee robust chemisorption and fast electrocatalytic conversion of polysulfides to enhance the sulfur electrochemistry,but also homogenize Li+flux to suppress the lithium dendrite growth.As a consequence,the MoC-modified separator endows the batteries with boosted reaction kinetics,promoted sulfur utilization,and improved cycling stability.A reversible capacity of 701 mAh·g-1 at a high rate of 5.0C and a small decay rate of 0.076％per cycle at 1.0C over 600 cycles are achieved.This study offers a rational route for design and synthesis of bifunctional nanoclusers with both sulfiphilicity and lithiophilicity for high-performance Li-S batteries.

Li-S batteriesNanoclusterElectrocatalystPolysulfide shuttleLi dendrites

Xing-Yuan Zhang、Mei-Na Lei、Shan Tian、Jian-Gan Wang

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State Key Laboratory of Solidification Processing,Center for Nano Energy Materials,School of Materials Science and Engineering,Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene(NPU),Xi'an 710072,China

research funds from the National Natural Science Foundation of China中央高校基本科研业务费专项中央高校基本科研业务费专项Analytical & Testing Center of Northwestern Polytechnical University for TEM analysis

52272239D50002108943102019JC005

2024

10.1007/s12598-023-02455-1

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(2)
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