Lithiation and Delithiation Mechanisms of Gold Thin Film Model Anodes for Lithium Ion Batteries: Electrochemical Characterization

Bach, Philipp; Stratmann, M.; Valencia-Jaime, Irais; Romero, Aldo H.; Renner, Frank Uwe

doi:10.1016/j.electacta.2015.02.184

Cited by 56 publications

(80 citation statements)

References 41 publications

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“…25 The lithiated GWRE potential remains stable for more than 500 h, varying by less than 2 mV after the initial 20 h of the OCV period. This means that the lithiated GWRE might not be suitable for highly accurate potential measurements during initial cycles, but is sufficient for tracking electrode potentials during prolonged cycling.…”

Section: Resultsmentioning

confidence: 99%

“…25 The overpotential at the first moments of lithiation have been attributed to the reduction of surface oxides 19 or the nucleation of the lithium-gold alloy phase. 25 During the subsequent OCV at 25…”

Section: Resultsmentioning

confidence: 99%

“…The Li 3 Au phase is the most lithium-rich composition which can be obtained electrochemically, corresponding to a specific capacity of 408 mAh/g Au . 19,[22][23][24][25][26] The lithiation of gold proceeds in two main potential plateaus, with the first stage having an OCV potential of ∼0.3 V vs. Li/Li + , and the second ∼0.2 V vs. Li/Li + . 25 Surprisingly, the intermediate phases detected between α-Au and Li 3 Au during electrochemical alloying could not be assigned to any of the known thermodynamic Li-Au phases.…”

mentioning

confidence: 99%

“…19,[22][23][24][25][26] The lithiation of gold proceeds in two main potential plateaus, with the first stage having an OCV potential of ∼0.3 V vs. Li/Li + , and the second ∼0.2 V vs. Li/Li + . 25 Surprisingly, the intermediate phases detected between α-Au and Li 3 Au during electrochemical alloying could not be assigned to any of the known thermodynamic Li-Au phases. [27][28][29][30] Bach et al 30 recently identified the metastable Li 3 Au 2 , Li 5 Au 3 , Li 3 Au 5 and LiAu 2 phases by in-situ high energy X-ray diffraction during the electrochemical lithiation and delithiation of gold thin film electrodes.…”

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confidence: 99%

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A Gold Micro-Reference Electrode for Impedance and Potential Measurements in Lithium Ion Batteries

Solchenbach

Pritzl

Kong

et al. 2016

J. Electrochem. Soc.

140

227

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Impedance measurements of lithium-ion batteries are a powerful tool to investigate the electrolyte/electrode interface. To separate the contributions of anode and cathode to the full-cell impedance, a reference electrode is required. However, if the reference electrode is placed inappropriately, the impedance response can easily be biased and lead to erroneous conclusions. In this study, we present a novel micro-reference electrode for Swagelok-type T-cells which is suitable for long-term impedance and reference potential measurements. The reference electrode consists of a thin insulated gold wire, which is placed centrally between cathode and anode and is in-situ electrochemically alloyed with lithium. The resulting lithium-gold alloy reference electrode shows remarkable stability (>500 h) even during cycling or at elevated temperatures (40 • C). The accuracy of impedance measurements with this novel reference electrode is carefully validated. Further, we investigate the effect of different vinylene carbonate (VC) contents in the electrolyte on the charge transfer resistance of LFP/graphite full cells and demonstrate that the ratio of VC to active material, rather than the VC concentration, determines the impedance of the anode SEI.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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A Gold Micro-Reference Electrode for Impedance and Potential Measurements in Lithium Ion Batteries

Solchenbach

Pritzl

Kong

et al. 2016

J. Electrochem. Soc.

140

227

View full text Add to dashboard Cite

show abstract

“…This chemical reaction at the surface of an electrode is known as an underpotential deposition. 24,25 Consequently, in the case of Li/Li 3 PO 4 /Au, when a set voltage of 2.0 V was applied ((i) in Fig. 2(a)), Li atoms on the Au side are transferred to the Li electrode, and a Li/Li 3 PO 4 /Au structure is formed ((ii) in Fig.…”

mentioning

confidence: 99%

A nonvolatile memory device with very low power consumption based on the switching of a standard electrode potential

et al. 2017

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We prepared a nonvolatile memory device that could be reversibly switched between a high and a low open-circuit voltage (Voc) regime. The device is composed of a solid electrolyte Li3PO4 film sandwiched between metal Li and Au electrodes: a Li/Li3PO4/Au heterostructure, which was fabricated at room temperature on a glass substrate. The bistable states at Voc ∼ 0.7 and ∼0.3 V could be reversibly switched by applying an external voltage of 2.0 and 0.18 V, respectively. The formation and deformation of an ultrathin Au–Li alloy at the Li3PO4/Au electrode interface were the origin of the reversible switching.

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Functionality of Dual‐Phase Lithium Storage in a Porous Carbon Host for Lithium‐Metal Anode

Kim

Lee

Yun

et al. 2020

Adv Funct Materials

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Lithium (Li) metal is regarded as the most attractive anode material for high-energy Li batteries, but it faces unavoidable challenges-uncontrollable dendritic growth of Li and severe volume changes during Li plating and stripping. Herein, a porous carbon framework (PCF) derived from a metal-organic framework (MOF) is proposed as a dual-phase Li storage material that enables efficient and reversible Li storage via lithiation and metallization processes. Li is electrochemically stored in the PCF upon charging to 0 V versus Li/Li + (lithiation), making the PCF surface more lithiophilic, and then the formation of metallic Li phase can be induced spontaneously in the internal nanopores during further charging below 0 V versus Li/Li + (metallization). Based on thermodynamic calculations and experimental studies, it is shown that atomically dispersed zinc plays an important role in facilitating Li plating and that the reversibility of Li storage is significantly improved by controlled nanostructural engineering of 3D porous nanoarchitectures to promote the uniform formation of Li. Moreover, the MOF-derived PCF does not suffer from macroscopic volume changes during cycling. This work demonstrates that the nanostructural engineering of porous carbon structures combined with lithiophilic element coordination would be an effective approach for realizing high-capacity, reversible Li-metal anodes.

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Lithiation and Delithiation Mechanisms of Gold Thin Film Model Anodes for Lithium Ion Batteries: Electrochemical Characterization

Cited by 56 publications

References 41 publications

A Gold Micro-Reference Electrode for Impedance and Potential Measurements in Lithium Ion Batteries

A Gold Micro-Reference Electrode for Impedance and Potential Measurements in Lithium Ion Batteries

A nonvolatile memory device with very low power consumption based on the switching of a standard electrode potential

Functionality of Dual‐Phase Lithium Storage in a Porous Carbon Host for Lithium‐Metal Anode

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