High energy density amorphous silicon anodes for lithium ion batteries deposited by DC sputtering

Farmakis, Filippos; Elmasides, Costas; Fanz, Patrik; Hagen, Markus; Georgoulas, N.

doi:10.1016/j.jpowsour.2015.05.083

Cited by 37 publications

(20 citation statements)

References 17 publications

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“…[ 16 ] These Si films are known to have low surface‐area‐to‐volume ratio resulting in a high ICE and can be fabricated reaching several micrometers (1–6 µm) in thickness and multiple square meters via various deposition techniques. [ 17,18 ] With hierarchical structuring of col‐Si films, areal capacities up to 7.5 mAh cm −2 with ICE over 90% have been already achieved. [ 19 ]…”

Section: Introductionmentioning

confidence: 99%

Enabling High‐Energy Solid‐State Batteries with Stable Anode Interphase by the Use of Columnar Silicon Anodes

Cangaz

Hippauf

Reuter

et al. 2020

Advanced Energy Materials

143

140

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All‐solid‐state batteries (ASSBs) with silicon anodes are promising candidates to overcome energy limitations of conventional lithium‐ion batteries. However, silicon undergoes severe volume changes during cycling leading to rapid degradation. In this study, a columnar silicon anode (col‐Si) fabricated by a scalable physical vapor deposition process (PVD) is integrated in all‐solid‐state batteries based on argyrodite‐type electrolyte (Li6PS5Cl, 3 mS cm−1) and Ni‐rich layered oxide cathodes (LiNi0.9Co0.05Mn0.05O2, NCM) with a high specific capacity (210 mAh g−1). The column structure exhibits a 1D breathing mechanism similar to lithium, which preserves the interface toward the electrolyte. Stable cycling is demonstrated for more than 100 cycles with a high coulombic efficiency (CE) of 99.7–99.9% in full cells with industrially relevant areal loadings of 3.5 mAh cm−2, which is the highest value reported so far for ASSB full cells with silicon anodes. Impedance spectroscopy revealed that anode resistance is drastically reduced after first lithiation, which allows high charging currents of 0.9 mA cm−2 at room temperature without the occurrence of dendrites and short circuits. Finally, in‐operando monitoring of pouch cells gave valuable insights into the breathing behavior of the solid‐state cell.

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Section: Introductionmentioning

confidence: 99%

Enabling High‐Energy Solid‐State Batteries with Stable Anode Interphase by the Use of Columnar Silicon Anodes

Cangaz

Hippauf

Reuter

et al. 2020

Advanced Energy Materials

143

140

View full text Add to dashboard Cite

show abstract

“…The Brunauer‐Emmett‐Teller (BET) specific surface area of MSBC was calculated to be 7.91 m 2 /g. Since a large specific surface area indicates a high surface SEI, the SEI films on the smaller particles have larger challenge of overgrowth and higher irreversible lithium ions consumption . Thus, in the commercial batteries design, the parameters of particle size and specific area must meet a certain requirement, and those of the prepared composite just laid in such range.…”

Section: Methodsmentioning

confidence: 99%

“…Since a large specific surface area indicates a high surface SEI, the SEI films on the smaller particles have larger challenge of overgrowth and higher irreversible lithium ions consumption. [35][36][37][38][39][40][41][42][43][44][45][46] Thus, in the commercial batteries design, the parameters of particle size and specific area must meet a certain requirement, and those of the prepared composite just laid in such range. The pore size 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 distribution (PSD) of MSBC particles was calculated by the Barrett-Joyner-Halenda (BJH) method and the pore diameter was distributed in the range of 1-20 nm.…”

Section: Improving the Performance Of Sio X /Carbon Materials For Higmentioning

confidence: 99%

Improving the Performance of SiO_x/Carbon Materials for High Energy Density Commercial Lithium‐Ion Batteries Based on Montmorillonite

et al. 2020

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Silicon is recognized as the most promising anode material for the next-generation battery. In order to improve the processing and electrochemical performances, a silicon-based anode composite was synthesized using silicon, montmorillonite and carboxymethylcellulose (CMC) as raw materials. The processing parameters, such as particle size and specific surface area, were ameliorated to be consistent with those of commercial lithium-ion battery (LIB) anode materials. As an anode composite, it perfectly matched with high nickel ternary cathode materials and showed excellent electrochemical properties. The discharge capacities were all above 1000 mAh/g and the coulombic efficiency of each step was over 99 % throughout the 50 cycles at 1 C (1100 mA/g). Its superior performances are attributed to the unique layered structure, which buffers the volume expansion and enhances the stability of the solid electrolyte interface (SEI) film on the anodic electrode, suggesting a perspective future in designing high energy density commercial LIBs.

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“…Both scenarios can lead to local overheating of the organic electrolyte up to its ignition temperature . To mitigate or suppress the growth of dendrites, a variety of strategies have been proposed in the past: 1) Specific cycling protocols (e.g., shallow cycling, pulsed charging) that only utilize a small amount of active material or allow for a higher ion concentration near the surface of the anode that is plated; 2) modification of the electrode (e.g., using intercalation electrodes, 3 D‐structured electrodes, liquid electrodes); 3) mechanical suppression (e.g., solid electrolytes, polymer‐membrane) and 4) modification of the electrolyte (e.g., NaF, InF 3 , fluoroethylene carbonate (FEC), nanodiamond particles) …”

Section: Introductionmentioning

confidence: 99%

Incorporating Diamondoids as Electrolyte Additive in the Sodium Metal Anode to Mitigate Dendrite Growth

et al. 2020

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Owing to the high abundance and gravimetric capacity (1165.78 mAh g−1) of pure sodium, it is considered as a promising candidate for the anode of next‐generation batteries. However, one major challenge needs to be solved before commercializing the sodium metal anode: The growth of dendrites during metal plating. One possibility to address this challenge is to use additives in the electrolyte to form a protective solid electrolyte interphase on the anode surface. In this work, we introduce a diamondoid‐based additive, which is incorporated into the anode to target this problem. Combining operando and ex situ experiments (electrochemical impedance spectroscopy, optical characterization, and cycling experiments), we show that molecular diamondoids are incorporated into the anode during cycling and successfully mitigate the growth of dendrites. Furthermore, we demonstrate the positive effect of the additive on the operation of sodium‐oxygen batteries by means of increased energy density.

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High energy density amorphous silicon anodes for lithium ion batteries deposited by DC sputtering

Cited by 37 publications

References 17 publications

Enabling High‐Energy Solid‐State Batteries with Stable Anode Interphase by the Use of Columnar Silicon Anodes

Enabling High‐Energy Solid‐State Batteries with Stable Anode Interphase by the Use of Columnar Silicon Anodes

Improving the Performance of SiO_x/Carbon Materials for High Energy Density Commercial Lithium‐Ion Batteries Based on Montmorillonite

Incorporating Diamondoids as Electrolyte Additive in the Sodium Metal Anode to Mitigate Dendrite Growth

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High energy density amorphous silicon anodes for lithium ion batteries deposited by DC sputtering

Cited by 37 publications

References 17 publications

Enabling High‐Energy Solid‐State Batteries with Stable Anode Interphase by the Use of Columnar Silicon Anodes

Enabling High‐Energy Solid‐State Batteries with Stable Anode Interphase by the Use of Columnar Silicon Anodes

Improving the Performance of SiOx/Carbon Materials for High Energy Density Commercial Lithium‐Ion Batteries Based on Montmorillonite

Incorporating Diamondoids as Electrolyte Additive in the Sodium Metal Anode to Mitigate Dendrite Growth

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Improving the Performance of SiO_x/Carbon Materials for High Energy Density Commercial Lithium‐Ion Batteries Based on Montmorillonite