Scalable process for application of stabilized lithium metal powder in Li-ion batteries

Ai, Guo; Wang, Zhihui; Zhao, Hui; Mao, Wenfeng; Fu, Yanbao; Yi, Ran; Gao, Yue; Battaglia, Vincent; Wang, Donghai; Lopatin, S.; Liu, Gao

doi:10.1016/j.jpowsour.2016.01.061

Cited by 77 publications

(70 citation statements)

References 41 publications

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“…However, the distribution of SLMP within the electrode is still not homogeneous enough for practical applications. A possible solution is the addition of compounds, which stabilize the dispersion and lead to a good distribution of SLMP particles within the electrode, e.g., the use of polystyrene (PS) (0.5% PS) [77]. Nevertheless, the advantage of adding the SLMP directly into the electrode slurry does not compensate for the fact that the complete electrode fabrication has to take place under dry room conditions, which again increases the cost of manufacturing.…”

Section: Pre-lithiation By Direct Contact To Lithium Metalmentioning

confidence: 99%

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 Direct Contact To Lithium Metalmentioning

confidence: 99%

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

et al. 2018

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“…Poly( N ‐methyl‐malonic amide) (PMA) contains a repeating unit of high dielectric constant dimethylacetamide (DMAc) that is used as an additive to protect electrolyte oxidation by a high‐voltage cathode . However, DMAc is easily reduced by a metallic lithium anode, as shown in Figure S1 in the Supporting Information . Therefore, PMA–LiTFSI layer was used to contact only the cathode and PEO–LiTFSI layer to contact only the anode in a double‐layer polymer solid electrolyte (DLPSE) having both a wide redox window and the high flexibility and plasticity for retention of electrode/electrolyte interfaces with low interfacial resistance over a long cycle life.…”

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confidence: 99%

“…A tail of a secondary semicircle can be clearly observed in the impedance spectrum of the Li/PEO–LiTFSI/PMA–LiTFSI/Li symmetric cell, indicating an additional interface reaction. The impedance of Li/PEO–LiTFSI/PMA–LiTFSI/Li symmetric cell was then monitored at 65 °C with increasing time, which showed an obvious increasing expansion in only 30 min (Figure S9, Supporting Information), indicating a corrosion reaction between the lithium‐metal and the PMA–LiTFSI electrolyte in this condition . The antioxidation performance of the DLPSE was investigated by a CV test in a Li/PEO–LiTFSI/PMA–LiTFSI/Fe cell at a scan rate of 0.2 mV s −1 from 2.5 to 5.05 V, as shown in the red curve of Figure b.…”

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confidence: 99%

Double‐Layer Polymer Electrolyte for High‐Voltage All‐Solid‐State Rechargeable Batteries

et al. 2018

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double-layer polymer electrolyte in which one layer contacts the anode and the other polymer layer contacts the cathode.Various types of lithium-conducting polymers have been explored; lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in poly(ethylene oxide) (PEO) composites have been the most extensively studied owing to their relatively high cation conductivity, acceptable anodic stability, and good membrane-forming capability. [4] Despite these advantages, the PEO-based polymer electrolytes are slowly oxidized at voltages over 3.9 V, which has restricted their use to cells with a lower-voltage cathode such as LiFePO 4 . [5] Enlarging the polymer redox voltage window is needed to be compatible with a high-voltage cathode if a polymer solid electrolyte battery is to meet the energy density specification ΔE > 300 Wh kg −1 . Moreover, there has been no suitable single liquid electrolyte having the required redox window. [3] The high oxidation potential solvents that are stable for cathodes show high anodic reactivity at the negative side; the low oxidation potential solvents compatible with a Li-metal anode exhibit a high reactivity on the high-voltage cathode side. The mixture of a high-voltage stable solvent and a low-voltage stable solvent in liquid electrolyte systems might hurt the electrochemical performance owing to the free diffusion of liquid solvent molecules. However, separate polymer interphase layers for lowering the interfacial impedance between a ceramic electrolyte and an electrode have been demonstrated, [6] which has initiated an investigation of a bilayer polymer electrolyte with a high-voltage stable layer contacting cathode and a low-voltage stable layer contacting anode.Poly(N-methyl-malonic amide) (PMA) contains a repeating unit of high dielectric constant dimethylacetamide (DMAc) that is used as an additive to protect electrolyte oxidation by a high-voltage cathode. [7] However, DMAc is easily reduced by a metallic lithium anode, as shown in Figure S1 in the Supporting Information. [8] Therefore, PMA-LiTFSI layer was used to contact only the cathode and PEO-LiTFSI layer to contact only the anode in a double-layer polymer solid electrolyte (DLPSE) having both a wide redox window and the high flexibility and plasticity for retention of electrode/electrolyte interfaces with low interfacial resistance over a long cycle life. In this DLPSE system, the DMAc containing PMA-LiTFSI layer was well isolated from the lithium-metal anode by a PEO-LiTFSI layer and the PEO-LiTFSI layer was protected by a PMA-LiTFSI layer from a high-voltage oxidation.No single polymer or liquid electrolyte has a large enough energy gap between the empty and occupied electronic states for both dendrite-free plating of a lithium-metal anode and a Li + extraction from an oxide host cathode without electrolyte oxidation in a high-voltage cell during the charge process. Therefore, a double-layer polymer electrolyte is investigated, in which one polymer provides dendrite-free plating of a Li-metal anode and the other all...

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“…The S@DHPC electrodes were prepared by a doctor blade coating method . In brief, polyvinylidene fluoride (PVDF) binder was dissolved in N‐methyl‐2‐pyrrolidone (NMP) under magnetic stirring.…”

Section: Methodsmentioning

confidence: 99%

Layered Electrodes Based on 3D Hierarchical Porous Carbon and Conducting Polymers for High‐Performance Lithium‐Sulfur Batteries

Zeng

Zhong

et al. 2019

Small Methods

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Easy dissolution of polysulfides and low loading of active materials are two major factors that limit the cathode cycling stability and energy density in lithium‐sulfur batteries. Herein, 3D hierarchical carbon with abundant pores is used for sulfur encapsulation (S@DHPC), which achieves a high sulfur content of 74 wt% and high sulfur loading of 5.8 mg cm−2. Importantly, coating the obtained S@DHPC electrode with poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) (PEDOT:PSS) conducting polymers is found to effectively impede the diffusion of polysulfide species, leading to marked improvement of the cycling stability of the electrode; and the electrode performance increases with an increasing number of the S@DHPC/PEDOT:PSS layer. For a three‐layer electrode, at a current density of 2 C, it delivers a discharge capacity of 846 mAh g−1 in the first cycle and maintains a capacity of 716 mAh g−1 after 500 cycles, corresponding to a fading rate of only 0.033% cycle−1. Results from this study suggest that layered electrodes can be exploited as a unique electrode architecture for the fabrication of high‐performance lithium‐sulfur batteries.

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Scalable process for application of stabilized lithium metal powder in Li-ion batteries

Cited by 77 publications

References 41 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

Double‐Layer Polymer Electrolyte for High‐Voltage All‐Solid‐State Rechargeable Batteries

Layered Electrodes Based on 3D Hierarchical Porous Carbon and Conducting Polymers for High‐Performance Lithium‐Sulfur Batteries

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