Reliable liquid electrolytes for lithium metal batteries

Yang, Huijing; Li, Juan; Sun, Zhenhua; Fang, Ruopian; Wang, Dawei; He, Kuang; Cheng, Hui‐Ming; Li, Feng

doi:10.1016/j.ensm.2020.04.010

Cited by 114 publications

(71 citation statements)

References 141 publications

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“…[ 14 ] All the above‐mentioned limitations can be overcome or reduced if dendrite growth/breakage can be prevented during the deposition/dissolution process. Many studies have been reported on the construction of dendrite‐free metal anodes: a) fabrication of modified electrodes or metal substrate surfaces, [ 15–24 ] b) synthesis of new electrolytes, [ 25–29 ] c) use of solid electrolytes, [ 22,30–32 ] and d) improvement of the electrode–electrolyte interface. [ 9,15,33,34 ] However, these studies have rarely focused on the properties, such as the stability of dendrites during charging and discharging, of dendrites.…”

Section: Introductionmentioning

confidence: 99%

Self‐Healing Properties of Alkali Metals under “High‐Energy Conditions” in Batteries

Zhang

et al. 2021

Advanced Energy Materials

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With the development of high‐energy‐density metal batteries, dendrite growth has become a bottleneck for the further improvement of alkali metal electrodes. In this study, the self‐healing performance of dendrites under “high‐energy conditions” are predicted and verified. Initially, the driving force of self‐healing is analyzed based on surface energy. Theoretically, the activation energy for atom diffusion, which contributes to the resistance of self‐healing, is quantitatively calculated. Moreover, to illustrate self‐healing in Li, Na, and K electrodes, electrochemical curves, in situ optical images, and SEM images are obtained at different temperatures and current densities. Based on the results, it is concluded that K dendrites under “high‐energy conditions” (i.e., at high temperatures and high current densities) possess the highest self‐healing ability and reparability. Consequently, the self‐healing properties of alkali metals under high‐energy conditions are theoretically and experimentally examined and confirmed.

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Section: Introductionmentioning

confidence: 99%

Self‐Healing Properties of Alkali Metals under “High‐Energy Conditions” in Batteries

Zhang

et al. 2021

Advanced Energy Materials

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“…Artificial intelligent would be a promising tool that can help to develop reliable additives. [ 145 ]…”

Section: Conclusion and Prospectmentioning

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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“…[ 1,2 ] Hitherto, the vast majority of commercially available lithium‐ion batteries (LIBs) and next generation systems such as Li–S and Li–O 2 rely on liquid electrolytes (LEs) because they endow the exchanged Li + with fast bulk and interface kinetics. [ 3–7 ] However, many insurmountable challenges arose from the use of LEs, such as their inherent leaking and flammability, diffusion of electrode‐decomposition products in high‐voltage LIBs, creating detrimental shuttle effect in Li–S (polysulfide) and Li–O 2 (redox mediators) batteries, restrict their widespread application in practical. [ 8,9 ] Ultimately, solid‐state batteries (SSBs) that rely on solid electrolytes (SEs; e.g., polymer and inorganic solid electrolyte) are considered to be effective in eliminating the thorny issues involved with using LEs.…”

Section: Introductionmentioning

confidence: 99%

Low Resistance and High Stable Solid–Liquid Electrolyte Interphases Enable High‐Voltage Solid‐State Lithium Metal Batteries

Cong

et al. 2021

Adv Funct Materials

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Solid‐state batteries (SSBs) with addition of liquid electrolytes are considered to possibly replace the current lithium‐ion batteries (LIBs) because they combine the advantages of benign interfacial contact and strong barriers for unwanted redox shuttles. However, solid electrolyte and liquid electrolyte are generally (electro)‐chemically incompatible and the resistance of the newly formed solid–liquid electrolyte interphase (SLEI) appears as an additional contribution to the overall battery resistance. Herein, a boron, fluorine‐donating liquid electrolyte (B, F‐LE) is introduced into the interface between the high‐voltage cathode and ultrathin composite solid electrolyte (CSE), which is fabricated by adhering a high content of nanosized Li6.4La3Zr1.4Ta0.6O12 (LLZTO) with poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP), to generate a low resistance and high stable SLEI in situ, giving a stable high‐voltage output with a reinforced cathode|CSE interface. B, F‐LE, consisting of a highly fluorinated electrolyte with a lithium bis(oxalato)borate additive, exhibits good chemical compatibility with CSE and enables rapid and uniform transportation of Li+, with its electrochemically and chemically stable interface for high‐voltage cathode. Eventually, the B, F‐LE assisted LiNi0.6Co0.2Mn0.2O2|Li battery displays the enhanced rate capability and high voltage cycling stability. The findings provide an interfacial engineering strategy to turn SLEI from a “real culprit” into the “savior” that may pave a brand‐new way to manipulate SLEI chemistry in hybrid solid–liquid devices.

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Reliable liquid electrolytes for lithium metal batteries

Cited by 114 publications

References 141 publications

Self‐Healing Properties of Alkali Metals under “High‐Energy Conditions” in Batteries

Self‐Healing Properties of Alkali Metals under “High‐Energy Conditions” in Batteries

Electrolyte additives: Adding the stability of lithium metal anodes

Low Resistance and High Stable Solid–Liquid Electrolyte Interphases Enable High‐Voltage Solid‐State Lithium Metal Batteries

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