Lithium Sulfide/Metal Nanocomposite as a High‐Capacity Cathode Prelithiation Material

Sun, Yueming; Lee, Hyun‐Wook; Seh, Zhi Wei; Guo, Zheng; Sun, Jun; Li, Yanbin; Cui, Yi

doi:10.1002/aenm.201600982

Cited by 29 publications

(40 citation statements)

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“…This approach is also applicable for other binary pre-lithiation agents, e.g., Li 2 O and LiF [114,122]. It is important to point out that the trace of oxygen existing in the argon atmosphere was reported to be sufficient to passivate the pre-lithiation agent for handling in ambient air [114,115,122].…”

Section: Pre-lithiation By Using Positive Electrode Additivesmentioning

confidence: 96%

“…Fourthly, the pre-lithiation agent has to be not only electrochemically stable but also thermally, chemically and mechanically stable after de-lithiation. The investigated additives range from binary compounds, such as Li2S [115,116], Li3N [117,118], LiN3 [119], Li2O [114,120], Li2O2 [121] or LiF [122], to ternary compounds, such as Li5FeO4 [123], Li2NiO2 [124,125], Li6CoO4 [126] or Li2MoO3 [127].…”

Section: Pre-lithiation By Using Positive Electrode Additivesmentioning

confidence: 99%

“…Zhan et al [116] investigated this issue by mixing Li 2 S with Ketjenblack (KB) and poly(vinylpyrrolidone) (PVP) but this mixture was not used with NMP in the positive electrode preparation process. Another approach to solve the compatibility problems of Li 2 S is to introduce transition metals (e.g., Fe or Co) [115]. For example, a precursor like CoS 2 was mixed with molten Li metal in argon atmosphere and afterwards stirred at 185 • C for 20 min and at 220 • C for 2 h, which leads to the formation of Li 2 S/Co [115].…”

Section: Pre-lithiation By Using Positive Electrode Additivesmentioning

confidence: 99%

“…Another approach to solve the compatibility problems of Li 2 S is to introduce transition metals (e.g., Fe or Co) [115]. For example, a precursor like CoS 2 was mixed with molten Li metal in argon atmosphere and afterwards stirred at 185 • C for 20 min and at 220 • C for 2 h, which leads to the formation of Li 2 S/Co [115]. The chemical transformation and later de-lithiation of the pre-lithiation agent are depicted in Figure 12b.…”

Section: Pre-lithiation By Using Positive Electrode Additivesmentioning

confidence: 99%

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Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

et al. 2018

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Abstract:In order to meet the sophisticated demands for large-scale applications such as electro-mobility, next generation energy storage technologies require advanced electrode active materials with enhanced gravimetric and volumetric capacities to achieve increased gravimetric energy and volumetric energy densities. However, most of these materials suffer from high 1st cycle active lithium losses, e.g., caused by solid electrolyte interphase (SEI) formation, which in turn hinder their broad commercial use so far. In general, the loss of active lithium permanently decreases the available energy by the consumption of lithium from the positive electrode material. Pre-lithiation is considered as a highly appealing technique to compensate for active lithium losses and, therefore, to increase the practical energy density. Various pre-lithiation techniques have been evaluated so far, including electrochemical and chemical pre-lithiation, pre-lithiation with the help of additives or the pre-lithiation by direct contact to lithium metal. In this review article, we will give a comprehensive overview about the various concepts for pre lithiation and controversially discuss their advantages and challenges. Furthermore, we will critically discuss possible effects on the cell performance and stability and assess the techniques with regard to their possible commercial exploration.

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Section: Pre-lithiation By Using Positive Electrode Additivesmentioning

confidence: 96%

Section: Pre-lithiation By Using Positive Electrode Additivesmentioning

confidence: 99%

Section: Pre-lithiation By Using Positive Electrode Additivesmentioning

confidence: 99%

Section: Pre-lithiation By Using Positive Electrode Additivesmentioning

confidence: 99%

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Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

et al. 2018

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“…Besides CS 2 , Li metal can also react with other metal sulfides (such as CoS 2 and FeS 2 ). The reaction is shown as follow (M: metal) [ 125 ]

4 Li (l) + {MS}_{2} (s) = 2 {Li}_{2} S (s) + M (s)

…”

Section: Sulfur‐based Cathode Materials: Methods Problems and Solutmentioning

confidence: 99%

Electrode Design for Lithium–Sulfur Batteries: Problems and Solutions

Huang

Liu

et al. 2020

Adv Funct Materials

246

136

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Pursuit of advanced batteries with high-energy density is one of the eternal goals for electrochemists. Over the past decades, lithium-sulfur batteries (LSBs) have gained world-wide popularity due to their high theoretical energy density and cost effectiveness. However, their road to the market is still full of thorns. Apart from the poor electronic conductivity of sulfur-based cathodes, LSBs involve special multielectron reaction mechanisms associated with active soluble lithium polysulfides intermediates. Accordingly, the electrode design and fabrication protocols of LSBs are different from those of traditional lithium ion batteries. This review is aimed at discussing the electrode design/fabrication protocols of LSBs, especially the current problems on various sulfur-based cathodes (such as S, Li 2 S, Li 2 S x catholyte, organopolysulfides) and corresponding solutions. Different fabrication methods of sulfur-based cathodes are introduced and their corresponding bullet points to achieve high-quality cathodes are highlighted. In addition, the challenges and solutions of sulfur-based cathodes including active material content, mass loading, conductive agent/binder, compaction density, electrolyte/sulfur ratio, and current collector are summarized and rational strategies are refined to address these issues. Finally, the future prospects on sulfur-based cathodes and LSBs are proposed.

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A Molecular‐Cage Strategy Enabling Efficient Chemisorption–Electrocatalytic Interface in Nanostructured Li₂S Cathode for Li Metal‐Free Rechargeable Cells with High Energy

Zhao

Wang

et al. 2019

Adv Funct Materials

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Using high‐capacity and metallic Li‐free lithium sulfide (Li2S) cathodes offers an alternative solution to address serious safety risks and performance decay caused by uncontrolled dendrite hazards of Li metal anodes in next‐generation Li metal batteries. Practical applications of such a cathode, however, still suffer from low redox activity, unaffordable cost, and poor processability of infusible and moisture‐sensitive Li2S. Herein, these difficulties are addressed by developing a molecular cage–engaged strategy that enables low‐cost production and interfacial engineering of Li2S cathodes for rechargeable Li2S//Si cells. An efficient chemisorption–electrocatalytic interface is built in extremely nanostructured Li2S cathodes by harnessing the confinement/separation effect of metal–organic molecular cages on ionic clusters of air‐stable, soluble, and low‐cost Li salt and their chemical transformation. It effectively boosts the redox activity toward Li2S activation/dissociation and polysulfide chemisorption–conversion in Li‐S batteries, leading to low activation voltage barrier, stable cycle life of 1000 cycles, ultrafast current rate up to 8 C, and high areal capacities of Li2S cathodes with high mass loading. Encouragingly, this highly active Li2S cathode can be applied for constructing truly workable Li2S//Si cells with a high specific energy of 673 Wh kg−1 and stable performance for 200 cycles at high rates against hollow nanostructured Si anode.

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Lithium Sulfide/Metal Nanocomposite as a High‐Capacity Cathode Prelithiation Material

Cited by 29 publications

References 0 publications

Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

Electrode Design for Lithium–Sulfur Batteries: Problems and Solutions

A Molecular‐Cage Strategy Enabling Efficient Chemisorption–Electrocatalytic Interface in Nanostructured Li₂S Cathode for Li Metal‐Free Rechargeable Cells with High Energy

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Lithium Sulfide/Metal Nanocomposite as a High‐Capacity Cathode Prelithiation Material

Cited by 29 publications

References 0 publications

Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

Electrode Design for Lithium–Sulfur Batteries: Problems and Solutions

A Molecular‐Cage Strategy Enabling Efficient Chemisorption–Electrocatalytic Interface in Nanostructured Li2S Cathode for Li Metal‐Free Rechargeable Cells with High Energy

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Product

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A Molecular‐Cage Strategy Enabling Efficient Chemisorption–Electrocatalytic Interface in Nanostructured Li₂S Cathode for Li Metal‐Free Rechargeable Cells with High Energy