Construction of highly stable and fast kinetic interfacial films on the electrodes of graphite//LiNi0.5Mn1.5O4 cells by introducing a novel additive of 2-thiophene boric acid (2-TPBA)

Zhou, Kuan; Quan, Lijiao; Zhou, Huifang; Che, Yanxia; Li, Xiaoqing; Chen, Qiurong; Li, Weishan; Xu, Mengqing

doi:10.1016/j.jpowsour.2023.232848

Cited by 11 publications

(7 citation statements)

References 41 publications

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“…2b presents the discharge curves of cells with STD and STD + 1% DLPP electrolytes at 0.2 C, which contain two voltage plateaus at around 4.7 and 4.0 V, corresponding to Ni 4+ /Ni 3+ /Ni 2+ reaction and Mn 4+ /Mn 3+ reactions, respectively, accompanied with lithium insertion reaction. The discharge capacity is enhanced compared to the cells with STD, owing to the oxidation decomposition of DLPP forming a more stable CEI film on LNMO's surface [10] . Fig.…”

Section: Resultsmentioning

confidence: 99%

Diethyl (4-isopropylbenzyl) phosphonate as an electrolyte additive for LiNi0.5Mn1.5O4 cathode for high-voltage Li-ion battery

Wei,

Li,

Zhang

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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Diethyl (4-isopropylbenzyl)phosphonate (DLPP) was applied as a positive film forming additive for LiNi 0.5 Mn 1.5 O 4 (LNMO) cathode. The rate and cycling performances of LNMO have been improved by adding 1 wt.% DLPP in carbonate electrolyte. The DFT calculation and LSV test shows that DLPP can preferentially oxidize decomposition during charging process, which inhibits the continuous electrolyte decomposition and promotes the formation of a protective cathode layer. LNMO/Li half-cell using the electrolyte with 1 wt.% DLPP delivers better rate capabilities and capacity retention of 92.8% after 200 cycles at 3 C (86.8% with STD electrolyte). SEM and XRD tests of the electrode after cycling show that DLPP can significantly stabilize the LNMO/electrolyte interface and crystal structures.

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Section: Resultsmentioning

confidence: 99%

Diethyl (4-isopropylbenzyl) phosphonate as an electrolyte additive for LiNi0.5Mn1.5O4 cathode for high-voltage Li-ion battery

Wei,

Li,

Zhang

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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“…The discharge capacity of the LNMO/Li half-cell with STD + 0.5% TMSN electrolyte is significantly improved compared to the cells using STD electrolyte in Fig. 2 (b, c), which may be ascribed to the TMSN oxidation decomposition may form a stable CEI film on LNMO's surface [8,9]. The cycling performances of LNMO/Li half-cells are shown in Fig.…”

Section: Current(ua)mentioning

confidence: 99%

Study on the (trimethoxysilyl) naphthalene electrolyte additive for enhancing electrochemical performance of LiNi0.5Mn1.5O4 cathode for Li-ion battery

Wei,

Mu,

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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The electrochemical performances of LiNi 0.5 Mn 1.5 O 4 (LNMO) have been improved by adding 0.5 wt.% (Trimethoxysilyl)naphthalene (TMSN) in carbonate electrolyte. The linear sweep voltammetry (LSV) test shows TMSN could preferentially undergo oxidative decomposition during charging process, which further inhibits the electrolyte decomposition. LNMO/Li half-cell presents better rate capabilities and an increased capacity retention of 89.3% after 200 cycles at 1 C by adding 0.5wt. % TMSN, indicating that TMSN can significantly reduce the HF content in the electrolytes and form a stable electrolyte/electrode interfacial on LNMO's surface.

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“…and Zhou et al., 3‐Thp‐BOH and the very similar 2‐Thp‐BOH were already introduced as promising electrolyte additives for NMC622||Li‐metal and LNMO||graphite cells. [ 37,38 ] In our study, the improved electrochemical performance was achieved by forming an effective CEI, mitigating the failure mechanisms to a large extent, such as transition metal dissolution or oxidative electrolyte decomposition. Operando SHINERS caught the formation of a stable 3‐Thp‐BOH‐based polymeric film on the cathode surface at 2.8 V versus Li|Li + .…”

Section: Introductionmentioning

confidence: 99%

Quadrupled Cycle Life of High‐Voltage Nickel‐Rich Cathodes: Understanding the Effective Thiophene‐Boronic Acid‐Based CEI via Operando SHINERS

Pfeiffer

Diddens

Weiling

et al. 2023

Advanced Energy Materials

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Increasing the cell voltage of lithium-ion batteries (LIBs) is a straightforward approach to increasing their capacity and energy density. However, state-of-the-art cathode materials like LiNi x Mn y Co 1-x-y O 2 (NMC) suffer from severe failure mechanisms at high operating voltages, significantly degrading the performance and cycle life of the cells. Notably, an effective cathode electrolyte interphase (CEI) mitigates these failure mechanisms. Nevertheless, a deep understanding of the formation mechanisms and properties of the CEI is necessary to tailor effective interphases. This study introduces a promising electrolyte additive for high operating voltage NMC811||graphite cells. Implementing an optimized concentration of 3-thiophene boronic acid (3-Thp-BOH) significantly enhances the cells' performance and reduces capacity fading, resulting in a quadrupled cycle life and a six-times higher accumulated specific energy. Operando shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) is employed to shed light on the formation mechanism and molecular composition of CEI during cell operation, proving that the presence of the additive results in the formation of a complex 3-Thp-BOH-based polymeric CEI on the NMC811 surface. The CEI investigation is additionally supported by scanning electron microscopy and energy dispersive X-ray analysis and highly accurate quantum chemistry modeling of the suggested polymerization mechanisms.

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Construction of highly stable and fast kinetic interfacial films on the electrodes of graphite//LiNi0.5Mn1.5O4 cells by introducing a novel additive of 2-thiophene boric acid (2-TPBA)

Cited by 11 publications

References 41 publications

Diethyl (4-isopropylbenzyl) phosphonate as an electrolyte additive for LiNi0.5Mn1.5O4 cathode for high-voltage Li-ion battery

Diethyl (4-isopropylbenzyl) phosphonate as an electrolyte additive for LiNi0.5Mn1.5O4 cathode for high-voltage Li-ion battery

Study on the (trimethoxysilyl) naphthalene electrolyte additive for enhancing electrochemical performance of LiNi0.5Mn1.5O4 cathode for Li-ion battery

Quadrupled Cycle Life of High‐Voltage Nickel‐Rich Cathodes: Understanding the Effective Thiophene‐Boronic Acid‐Based CEI via Operando SHINERS

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