Citation: Shengdong Jing, Xiaoli Peng, Shilan Li, Long Yuan, Shengjun Lu, Yufei Zhang, Haosen Fan. Synergistic realization of fast polysulfide redox kinetics and stable lithium anode in Li-S battery from CoNi-MOF/MXene derived CoNi@TiO₂/C heterostructure[J]. Chinese Chemical Letters, ;2025, 36(10): 110732. doi: 10.1016/j.cclet.2024.110732 shu

Synergistic realization of fast polysulfide redox kinetics and stable lithium anode in Li-S battery from CoNi-MOF/MXene derived CoNi@TiO₂/C heterostructure

Shengdong Jing ^a ,
Xiaoli Peng ^a ,
Shilan Li ^a ,
Long Yuan ^a ,
Shengjun Lu ^{a, *,} ,
Yufei Zhang ^{c, d, *,} ,
Haosen Fan ^{b, *,}

a.
College of Materials Science and Metallurgy Engineering, Guizhou University, Guiyang 550025, China
b.
School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
c.
School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
d.
Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Jieyang 515200, China

sjlu@gzu.edu.cn

yfzhang@gdut.edu.cn

hsfan@gzhu.edu.cn

Received Date: 1 November 2024
Revised Date: 30 November 2024
Accepted Date: 5 December 2024
Available Online: 7 December 2024

Figures(5)

The efficient limitation of the "shuttle effect" of polysulfide from the rational construction of electrocatalysts to accelerate the redox kinetics of polysulfides is extremely important. In this work, the cobalt/Nickel bimetallic alloy polyhedrons decorated on layered TiO₂ heterostructure (CoNi@TiO₂/C) derived from MXene and bimetallic metal-organic framework have been prepared through liquid-phase deposition and high-temperature annealing processes. This heterostructure presents excellent electrical conductivity, which facilitates ion diffusion and electron transfer within the battery. Besides, the heterostructure from anchoring the CoNi bimetallic alloy on the layered TiO₂ ensures the full exposure of active sites and accelerates polysulfide redox kinetics through chemisorption and catalytic conversion. Considering these advantages mentioned above, when applied as the lithium-sulfur batteries (LSBs) separator modifier, the cell assembled from the CoNi@TiO₂/C modified separator demonstrates high specific capacity (1481.7 mAh/g at 0.5 C), superior rate capability (855.5 mAh/g at 3 C) and excellent cycling performance, which can maintain the high capacity of 856.09 mAh/g after 300 cycles with low capacity decay rate of 0.09% per cycle. Even under a high sulfur loading of 4.4 mg/cm², the cell can still present excellent cycling stability. This study paves the way for the design of novel material for the construction of an outstanding functional separator layer and shines the light on the effective and feasible way for the inhibition of shuttle effect in lithium-sulfur batteries.
- CoNi@TiO₂/C heterostructure,
- Shuttle effect,
- Catalytic conversion,
- Separator modifier,
- Lithium-sulfur battery
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Synergistic realization of fast polysulfide redox kinetics and stable lithium anode in Li-S battery from CoNi-MOF/MXene derived CoNi@TiO2/C heterostructure

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通讯作者: 陈斌, bchen63@163.com

Synergistic realization of fast polysulfide redox kinetics and stable lithium anode in Li-S battery from CoNi-MOF/MXene derived CoNi@TiO₂/C heterostructure