Electrolyte design for Li-ion batteries under extreme operating conditions

Xu, Feng; Zhang, Jiaxun; Pollard, Travis P.; Li, Qingdong; Tan, Sha; Hou, Singyuk; Wan, Hongli; Chen, Fu; He, Huixin; Hu, Enyuan; Xu, Ke; Yang, Xiao‐Qing; Borodin, Oleg; Wang, Chunsheng

doi:10.1038/s41586-022-05627-8

Cited by 434 publications

(262 citation statements)

References 46 publications

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“…In contrast, low DN solvents, such as TEGDME, have weaker solvation. The Li 2 O 2 formation follows a mechanism via surface growth, leading to the formation of an insulating film that increases the cell resistance during discharge, reducing the system capacity. ,− …”

Section: Resultsmentioning

confidence: 99%

Systematic Study of O₂ Supply in Li–O₂ Batteries with High and Low Doner Number Solvents

Francisco

Júlio

Anchieta

et al. 2023

ACS Appl. Energy Mater.

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The Li–O2 battery is a promising technology due to its high theoretical specific energy. However, its practical capacity and cycling performance need further improvement. In this scenario, the influence of the electrolyte and the supply of air/O2 to the device are essential to enhance the performance and build a commercial prototype. This paper presents a study focusing on the influence of oxygen flow and pressure in the gravimetric capacity of Li–O2 batteries using two different electrolytes: dimethyl sulfoxide (DMSO/LiClO4) and tetraethylene glycol dimethyl ether (TEGDME/LiClO4). This study pointed out the negative influence of flow over the capacity when combined in an open cell. Due to electrolyte loss, the life cycle was also deeply affected using the open cell, especially for DMSO. However, DMSO leads to the best performance due to higher ionic conductivity, oxygen diffusivity, and absence of a direct reaction with the lithium anode. Thus, the closed cell reached a maximum discharge capacity of 22537 mAh g–1 with 26 cycles of 1000 mAh g–1 for DMSO and 8764 mAh g–1 with 13 cycles of 1000 mAh g–1 for TEGDME.

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Section: Resultsmentioning

confidence: 99%

Systematic Study of O₂ Supply in Li–O₂ Batteries with High and Low Doner Number Solvents

Francisco

Júlio

Anchieta

et al. 2023

ACS Appl. Energy Mater.

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“…to detect deposited Li on an anode, but these post mortem/ex situ characterizations require cells to be torn down prior to measurement and cannot have an effective role for very early safety warnings. , Therefore, a nondestructive operando/in situ technology is urgently needed to detect the onset of local Li plating (e.g., corresponding time, voltage, or capacity, etc. ). , More importantly, a precise/effective quantitative method is further needed to help quantify the irreversible capacity loss on the Gr anode and corresponding influence of the Gr electrolyte interface (e.g., components and construction), pointing out explicit/clear direction for an electrolyte modification strategy to restrain the unwanted Li plating. − …”

Section: Oems Measurement For the First Overdischarge Of Gr–li Cellsmentioning

confidence: 99%

Quantifying the Influence of Li Plating on a Graphite Anode by Mass Spectrometry

et al. 2023

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The prominent problem with graphite anodes in practical applications is the detrimental Li plating, resulting in rapid capacity fade and safety hazards. Herein, secondary gas evolution behavior during the Li-plating process was monitored by online electrochemical mass spectrometry (OEMS), and the onset of local microscale Li plating on the graphite anode was precisely/ explicitly detected in situ/operando for early safety warnings. The distribution of irreversible capacity loss (e.g., primary and secondary solid electrolyte interface (SEI), dead Li, etc.) under Li-plating conditions was accurately quantified by titration mass spectroscopy (TMS). Based on OEMS/TMS results, the effect of typical VC/FEC additives was recognized at the level of Li plating. The nature of vinylene carbonate (VC)/fluoroethylene carbonate (FEC) additive modification is to enhance the elasticity of primary and secondary SEI by adjusting organic carbonates and/or LiF components, leading to less "dead Li" capacity loss. Though VC-containing electrolyte greatly suppresses the H 2 /C 2 H 4 (flammable/explosive) evolution during Li plating, more H 2 is released from the reductive decomposition of FEC.

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“…Lithium-ion batteries (LIBs) are regarded as one of the most important examples of energy storage devices, being widely applied in the field of emerging technologies such as portable electronics and electric vehicles . Tremendous efforts have been devoted to improve the capacity, power, charge/discharge rate, lifetime, costs, and safety performance of LIBs to address various fundamental needs of new technologies by investigating electrode materials, electrolytes, and separators . However, there is still another challenge that also needs to be solved: the stability of LIBs in a wide range of operating temperatures .…”

Section: Introductionmentioning

confidence: 99%

“…Still, despite promising improvements, the poor conductivity of CMC and the brittle structures of lithium-substituted polymer binders can lead to the isolation of particles and the formation of cracks, which are adverse to the batteries’ cyclability. Moreover, since the glass transition temperature of SBR of −4.5 °C is relatively high, it would contribute to increased amounts of voids and cracks, resulting in electrode lamination and an increase in the internal resistance in the cells, thus confining its application at low temperatures since it has been reported that the interfacial resistance dominates at low temperatures . Hong et al .…”

Section: Introductionmentioning

confidence: 99%

Graphite Anode Functionalized with a Gel Biopolymer Binder for Li-Ion Batteries Operating in a Broad Temperature Range

Ding

Bagul

Cui

et al. 2023

ACS Appl. Energy Mater.

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A graphite anode with a polymer gel binder (PGB), consisting of chitosan, the ionic liquid PYR 14 DCA, and the lithium salt LiTFSI, was developed for high-power Li-ion batteries. The electrochemical properties of graphite with a PGB and polyvinylidene difluoride (PVDF) as a reference were investigated at 10 °C, 25 °C, and 60 °C and compared with each other. During cycling, a PGB has an effect on the composition of the solid-electrolyte-interface (SEI) layer by forming a LiF-enriched component. The charge/discharge behavior of graphite is determined to some extent by the stability and resistance of the SEI, especially at elevated and low temperatures. A stable SEI was formed on graphite/PGB electrodes leading to an excellent cycling and rate performance. Graphite/PGB delivered a discharge capacity of 230 mAh•g −1 after 1000 cycles at 1.86 A•g −1 current density (5C) at room temperature. At 60 °C, the replacement of PVDF by a PGB resulted in an enhancement of the electrochemical performance with a high capacity of 345 mAh• g −1 after 200 cycles at 5C, while the conventional graphite/PVDF electrode only displayed 57 mAh•g −1 . The high Li + diffusion provided by a PGB and the LiF-rich SEI on the graphite/PGB surface also contributed to a better electrochemical performance at a low temperature.

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Electrolyte design for Li-ion batteries under extreme operating conditions

Cited by 434 publications

References 46 publications

Systematic Study of O₂ Supply in Li–O₂ Batteries with High and Low Doner Number Solvents

Systematic Study of O₂ Supply in Li–O₂ Batteries with High and Low Doner Number Solvents

Quantifying the Influence of Li Plating on a Graphite Anode by Mass Spectrometry

Graphite Anode Functionalized with a Gel Biopolymer Binder for Li-Ion Batteries Operating in a Broad Temperature Range

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Electrolyte design for Li-ion batteries under extreme operating conditions

Cited by 434 publications

References 46 publications

Systematic Study of O2 Supply in Li–O2 Batteries with High and Low Doner Number Solvents

Systematic Study of O2 Supply in Li–O2 Batteries with High and Low Doner Number Solvents

Quantifying the Influence of Li Plating on a Graphite Anode by Mass Spectrometry

Graphite Anode Functionalized with a Gel Biopolymer Binder for Li-Ion Batteries Operating in a Broad Temperature Range

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Systematic Study of O₂ Supply in Li–O₂ Batteries with High and Low Doner Number Solvents

Systematic Study of O₂ Supply in Li–O₂ Batteries with High and Low Doner Number Solvents