Electrolyte-Additive-Driven Interfacial Engineering for High-Capacity Electrodes in Lithium-Ion Batteries: Promise and Challenges

Kim, Koeun; Ma, Hyunsoo; Park, Sewon; Choi, Nam‐Soon

doi:10.1021/acsenergylett.0c00468

Cited by 192 publications

(163 citation statements)

References 143 publications

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“…To optimize the electrolytes, many additives with various functional groups have been studied to restrain the decompositions of lithium salts and organic solvents in the electrolyte. [ 45,110,111 ] Some up‐to‐date and representative approaches for improving cathode, anode, and electrolyte in Ni‐rich cathode‐based LIBs will be discussed below.…”

Section: Improvement Strategiesmentioning

confidence: 99%

“…[ 187–189 ] Hence, the electrolyte additives will oxidize at the cathode surface and reduce at the anode surface before the decomposition reactions of electrolyte solvents take place, resulting in the formation of homogeneous CEI and SEI films. [ 110,190,191 ] Apart from the film‐forming ability, multifunctional additives also possess a high affinity toward HF and PF 5 species, which could mitigate the HF‐driven degradation, such as TM ions dissolution and gas formation. Recently, several kinds of multifunctional additives have been proposed in studies, aiming at the effective formation of protective films at both cathode and anode surfaces.…”

Section: Improvement Strategiesmentioning

confidence: 99%

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A Review of Degradation Mechanisms and Recent Achievements for Ni‐Rich Cathode‐Based Li‐Ion Batteries

Jiang

Danilov

Eichel

et al. 2021

Advanced Energy Materials

252

180

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The growing demand for sustainable energy storage devices requires rechargeable lithium‐ion batteries (LIBs) with higher specific capacity and stricter safety standards. Ni‐rich layered transition metal oxides outperform other cathode materials and have attracted much attention in both academia and industry. Lithium‐ion batteries composed of Ni‐rich layered cathodes and graphite anodes (or Li‐metal anodes) are suitable to meet the energy requirements of the next generation of rechargeable batteries. However, the instability of Ni‐rich cathodes poses serious challenges to large‐scale commercialization. This paper reviews various degradation processes occurring at the cathode, anode, and electrolyte in Ni‐rich cathode‐based LIBs. It highlights the recent achievements in developing new stabilization strategies for the various battery components in future Ni‐rich cathode‐based LIBs.

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Section: Improvement Strategiesmentioning

confidence: 99%

Section: Improvement Strategiesmentioning

confidence: 99%

A Review of Degradation Mechanisms and Recent Achievements for Ni‐Rich Cathode‐Based Li‐Ion Batteries

Jiang

Danilov

Eichel

et al. 2021

Advanced Energy Materials

252

180

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“…Lithium ions thus cannot re-intercalation to the ordinary position through the prolonged cycle, resulting in capacity decay, mechanical degradation and thermal weakness. [14]- [17] Lithium species, which forms near the surface of the cathode, is very easy to react with H2O, CO or CO2 in the air, so lithium residue such as Li2O, LiOH and Li2CO3 are generated on the cathode materials surface. [18] These residual lithium cause uneven SEI layer by unanticipated chemical reactions with electrolyte solvents, and the gelation occurs, increasing the pH of the cathode slurry, which causes electrode failure.…”

Section: High Nickel Cathode Problems and Improvement Planmentioning

confidence: 99%

Unanticipated Mechanism of the Trimethylsilyl Motif in Electrolyte Additives on Nickel-Rich Cathodes in Lithium-Ion Batteries

Park

Choi

2020

ACS Appl. Mater. Interfaces

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The introduction of a trimethylsilyl (TMS) motif in electrolyte additives for lithium-ion batteries is regarded as an effectual approach to remove corrosive hydrofluoric acid (HF) that structurally and compositionally damages the electrode−electrolyte interface and gives rise to transition metal dissolution from the cathode. Herein, we present that electrolyte additives with TMS moieties lead to continued capacity loss of polycrystalline (PC)-LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathodes coupled with graphite anodes compared to additives without TMS as the cycle progresses. Through a comparative study using electrolyte additives with and without TMS moieties, it is revealed that the TMS group is prone to react with residual lithium compounds, in particular, lithium hydroxide (LiOH) on the PC-NCM811 cathode, and the resulting TMS-OH triggers the decomposition of PF 5 created by the autocatalytic decomposition of LiPF 6 that generates reactive species, namely, HF and POF 3 . This work aims to offer a way to build favorable interface structures for Ni-rich cathodes covered with residual lithium compounds through a study to figure out the roles of TMS moieties of electrolyte additives.

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“…Notably, even with a trickle recharge at a low voltage, the SEI formation that occurs after deep overdischarge is not as controlled as that which occurs during the formation process during battery manufacturing. Many cell manufacturers include sacrificial additives that promote the formation of a stable SEI; these additives are often fully consumed during the initial formation and would not be present during the reformation occurring after overdischarge [14]. The gas formed during SEI reformation is also trapped within the cell.…”

Section: Analysis Of Overdischarge Resultsmentioning

confidence: 99%

Examining the Performance of Implantable-Grade Lithium-Ion Cells after Overdischarge and Thermally Accelerated Aging

et al. 2022

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For implanted medical devices containing rechargeable batteries, maximizing battery lifetime is paramount as surgery is required for battery replacement. In non-life-sustaining applications (e.g., spinal cord stimulators or sacral nerve modulation), these implants may be left unused and unmaintained for extended periods, according to patient preference or in the case of unexpected life events. In this study, we examine the performance of two commercial lithium-ion cells intended for implantable neurostimulators (using lithium titanium oxide (LTO) and graphite as the negative electrode) when subjected to repeated deep overdischarge and to aging at a high state of charge (SOC). The graphite-based cells exhibited significant performance decline and swelling after overdischarge and became unable to store a charge after 42 days at 0 V. In contrast, the LTO-based cells exhibited minimal changes in performance even after 84 days (the length of the study) at 0 V. When subjected to an accelerated aging protocol at 100% SOC, the graphite-based cells were found to age more rapidly than the LTO cells, which exhibited minimal aging over the course of the study period. These results show that practical LTO-based lithium-ion cells are much more tolerant of abuse as a result of neglect and misuse and are worth considering for use in high-value applications where battery replacement is difficult or impossible.

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Electrolyte-Additive-Driven Interfacial Engineering for High-Capacity Electrodes in Lithium-Ion Batteries: Promise and Challenges

Cited by 192 publications

References 143 publications

A Review of Degradation Mechanisms and Recent Achievements for Ni‐Rich Cathode‐Based Li‐Ion Batteries

A Review of Degradation Mechanisms and Recent Achievements for Ni‐Rich Cathode‐Based Li‐Ion Batteries

Unanticipated Mechanism of the Trimethylsilyl Motif in Electrolyte Additives on Nickel-Rich Cathodes in Lithium-Ion Batteries

Examining the Performance of Implantable-Grade Lithium-Ion Cells after Overdischarge and Thermally Accelerated Aging

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