Suppression of dendrites and granules in surface-patterned Li metal anodes using CsPF6

Kim, Seokwoo; Choi, Jong-Deok; Lee, Hongkyung; Jeong, Yong‐Cheol; Lee, Yong Min; Ryou, Myung‐Hyun

doi:10.1016/j.jpowsour.2018.12.052

Cited by 17 publications

(15 citation statements)

References 28 publications

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“…19,21−24 Consequently, we recently reported the effect of CsPF 6 additives on surface-patterned Li metal when 80 μL of CsPF 6 -containing liquid electrolyte was used. 25…”

Section: Introductionmentioning

confidence: 99%

Effect of the Quantity of Liquid Electrolyte on Self-Healing Electrostatic Shield Mechanism of CsPF₆ Additive for Li Metal Anodes

et al. 2019

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We used a cesium hexafluorophosphate (CsPF 6 )-containing liquid electrolyte for surface-patterned Li metal anodes and confirmed that there is a synergistic improvement in the electrochemical performance such as cycle performance and rate capability. For instance, the surface-patterned Li metal maintains 91.4% of the initial discharge capacity after the 1000th cycle (C/2 = 0.8 mA cm –2 for charging, 1C for discharging). When a large quantity of the CsPF 6 -containing liquid electrolyte (600 μL) is used, the bare Li metal and surface-patterned Li metal are more effectively stabilized in comparison with the case where 80 μL of electrolyte is used, resulting in improved electrochemical performance. Through systematic testing, we recognize that these results are because of the self-healing electrostatic shield mechanism, which is mainly dependent on the amount of Cs + ions. A small amount of Cs + ions cannot effectively counteract the incoming Li + ions because they cannot form an effective electrostatic shield on the protrusions present on the Li metal surface.

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“…19,21−24 Consequently, we recently reported the effect of CsPF 6 additives on surface-patterned Li metal when 80 μL of CsPF 6 -containing liquid electrolyte was used. 25…”

Section: Introductionmentioning

confidence: 99%

Effect of the Quantity of Liquid Electrolyte on Self-Healing Electrostatic Shield Mechanism of CsPF₆ Additive for Li Metal Anodes

et al. 2019

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“…[ 48 ] Subsequently, Kim et al. [ 49 ] introduced the CsPF 6 additive into the surface‐patterned lithium metal anode, with expectation to utilize the synergistic effect of electrostatic shielding mechanism and the surface patterns (conductive host). The addition of CsPF 6 further reduced the formation of mossy and granular Li in the patterned holes.…”

Section: Electrostatic Shield Mechanismmentioning

confidence: 99%

Electrolyte additives: Adding the stability of lithium metal anodes

Dai

Wang

2020

Nano Select

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Lithium metal is regarded as the “holy grail” of anodes due to its highest theoretical specific capacity and lowest electrode potential, and hence is considered as a promising anode candidate to meet the growing demand for large scale energy storage devices. However, lithium metal anode is suffering the challenges in side reactions, volume change, and low Coulombic efficiency, and particularly the growth of lithium dendrites, which extremely limits its practical applications. To tackle these issues, many strategies have been developed. Among them, the addition of electrolyte additives is an effective and the simplest method. In this review, electrolyte additives for enhancing the stability of Li metal anodes are summarized, according to their different working mechanisms. The prospects of key challenges and future trends of such electrolyte additives are discussed.

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“…c) Effect of CsPF 6 on patterned Li metal electrode at high current density (2.1 mA cm −2 , 5 min) Reproduced with permission. [ 162 ] Copyright 2019, Elsevier B.V. d) Schematic illustration of micropatterned Li metal and Li plating behavior. Reproduced with permission.…”

Section: Use Of LI Metal Powder and Micropatterning To Increase Surfamentioning

confidence: 99%

“…In addition, Kim et al used CsPF 6 as an additive to form an electrostatic shield on the Li metal surface (Figure 8c). [ 162,163 ] According to previous works, at low concentrations, Cs + ions exhibit a lower reduction potential than Li + ions, thereby forming a positively charged electrostatic shield around the initial Li dendrite deposit. [ 154,164 ] This shielding precludes Li dendrite formation by forcing the deposition of Li + ions into regions adjacent to protrusions and results in the filling of patterned holes on the Li metal electrode with liquid‐like Li deposits without the formation of mossy dendrites at high current density.…”

Section: Use Of LI Metal Powder and Micropatterning To Increase Surfamentioning

confidence: 99%

Structure‐Controlled Li Metal Electrodes for Post‐Li‐Ion Batteries: Recent Progress and Perspectives

Jin

Park

Ryou

et al. 2020

Adv Materials Inter

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more batteries, this approach fails to exceed the threshold of 500 km in view of the limited battery mounting space in EVs and the almost saturated energy density of state-of-the-art LIBs (Figure 1a).As demonstrated in the road map for the development of the eGolf (an EV from Volkswagen), a driving range of 420 km can be achieved by 2020 based on the currently available LIB chemistry, cell design techniques, and vehicle frame lightening.

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Suppression of dendrites and granules in surface-patterned Li metal anodes using CsPF6

Cited by 17 publications

References 28 publications

Effect of the Quantity of Liquid Electrolyte on Self-Healing Electrostatic Shield Mechanism of CsPF₆ Additive for Li Metal Anodes

Effect of the Quantity of Liquid Electrolyte on Self-Healing Electrostatic Shield Mechanism of CsPF₆ Additive for Li Metal Anodes

Electrolyte additives: Adding the stability of lithium metal anodes

Structure‐Controlled Li Metal Electrodes for Post‐Li‐Ion Batteries: Recent Progress and Perspectives

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Suppression of dendrites and granules in surface-patterned Li metal anodes using CsPF6

Cited by 17 publications

References 28 publications

Effect of the Quantity of Liquid Electrolyte on Self-Healing Electrostatic Shield Mechanism of CsPF6 Additive for Li Metal Anodes

Effect of the Quantity of Liquid Electrolyte on Self-Healing Electrostatic Shield Mechanism of CsPF6 Additive for Li Metal Anodes

Electrolyte additives: Adding the stability of lithium metal anodes

Structure‐Controlled Li Metal Electrodes for Post‐Li‐Ion Batteries: Recent Progress and Perspectives

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Effect of the Quantity of Liquid Electrolyte on Self-Healing Electrostatic Shield Mechanism of CsPF₆ Additive for Li Metal Anodes

Effect of the Quantity of Liquid Electrolyte on Self-Healing Electrostatic Shield Mechanism of CsPF₆ Additive for Li Metal Anodes