Revealing the critical effect of solid electrolyte interphase on the deposition and detriment of Co(Ⅱ) ions to graphite anode

Xie, Qiming; Chen, Jiawei; Xing, Lidan; Zhou, Xianggui; Ma, Zekai; Wu, Binhong; Lin, Yongfeng; Zhou, Huifang; Li, Weishan

doi:10.1016/j.jechem.2021.12.009

Cited by 18 publications

(7 citation statements)

References 53 publications

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“…[240,249] Very recently, it was confirmed that the dissolved TM ions can replace the Li + ions in the developed SEI, thus destroying SEI and finally deteriorating the battery cycling performance. [250] In a word, above mentioned side reactions result in increase of internal resistance and loss of cyclable lithium, thus poor cycling performance in the full cell rather than half-cell, especially, in high SOC or at a high storage/operating temperature as shown in Figure 18b,c. [240] It is worth mentioning that loss of cyclable lithium because of TM ions dissolution of LNMO cathode has only a minor contribution (less than 5%) as confirmed by the recovery up to 95% of the capacity in a LNMO half cell.…”

Section: Issuesmentioning

confidence: 99%

Cobalt‐Free Cathode Materials: Families and their Prospects

Zhao

Lam

Sheng

et al. 2022

Advanced Energy Materials

105

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With the rapid growth of global electro‐mobility, the demand for cobalt is rapidly increasing because it is currently an indispensable component of the cathode materials in lithium‐ion batteries (LIBs). However, the use of Co raises moral issues caused by its exploitation and the geographic limitations of Co resources may result in risking the supply of LIBs. Thus, the development of cobalt‐free (Co‐free) cathodes has become a focus in the LIBs industry. Currently, Co‐free cathodes of lithium‐rich oxides, nickel‐rich layered oxides and spinel lithium nickel manganese oxide (LNMO) are promising candidates but face severe problems. This review article is the first to synthesize and present the progress of Co‐free cathodes made with Li‐rich oxides, Ni‐rich layered oxides and spinel LNMO, identifying their performance, problems and potential development trends. In particular, the roles of cobalt are further clarified, and the full‐cell performance and related commercialization prospects of the three above‐mentioned Co‐free cathodes are also objectively assessed. The focus of this work is to distill detailed and timely insights from the corresponding research progress on these materials and to demonstrate the associated urgency, challenges and opportunities in this field, thus facilitating a faster industrialization of Co‐free cathodes.

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Section: Issuesmentioning

confidence: 99%

Cobalt‐Free Cathode Materials: Families and their Prospects

Zhao

Lam

Sheng

et al. 2022

Advanced Energy Materials

105

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“…68 (2) The replacement reaction between M x + and the SEI would destroy the SEI and consume Li continuously, resulting in the drop of battery voltage and capacity. 69 (3) M x + would destroy the anode structure after they are reduced on the anode, ruining the regular charging and discharging of the battery. 70 In addition, due to transition metal dissolution, the structure evolution of the cathode would also result in the capacity decay of the battery.…”

Section: High-precision Measurementsmentioning

confidence: 99%

The significance of detecting imperceptible physical/chemical changes/reactions in lithium-ion batteries: a perspective

Zhao

Lam

Wang

et al. 2022

Energy Environ. Sci.

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“…Although lithium-ion batteries (LIBs) applied in commercial and household fields have significantly increased the energy density, their energy density still cannot meet the demands of advanced devices. − In order to achieve a higher energy density, Ni–Co–Mn ternary cathode materials of LiNi x Co y Mn z ( x + y + z = 1) have been widely utilized. However, the inevitable dissolution of transition metal ions (TMIs) during cycling is an obvious defect that is easy to cause performance degradation and safety hazards. − Further researches have shown that the dissolution and deposition of Mn 2+ ions are more severe, compared with Co 2+ and Ni 2+ ions, − implying that inhibiting the negative impact of Mn 2+ ions on the cycle performance of LIBs is more critical. − As reported, the dissolved Mn 2+ ions will deposit onto the surface of the anode and serve as a catalyst for the side reactions of electrolyte. This catalytic activity leads to an excessive growth of the solid electrolyte interphase (SEI) and a rapid increase of the impedance, ultimately reducing the cycle life of LIBs.…”

Section: Introductionmentioning

confidence: 99%

Inhibition Mechanism of Weakly Solvating Electrolyte against Capacity Fade Caused by Mn (II) Deposition in Lithium-Ion Batteries

Zhang,

Sun,

Cui

et al. 2024

ACS Sustainable Chem. Eng.

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The dissolution and deposition of Mn (II) are considered to be non-negligible factors of capacity fade in lithium-ion batteries. The high-concentration electrolytes (HCEs) can inhibit the deposition of Mn (II), but the high cost and viscosity limit their practical application. Herein, the weakly solvating solvent tetrahydrofuran (THF) is selected to regulate the solvation structure, inspired by the inhibition mechanism of HCEs. We find that the high proportion of contact ion pairs and aggregates formed in THF-based weakly solvating electrolyte brings about a significant increase in the lowest unoccupied orbital value of the solvation structure of Mn (II) and achieves almost 100% capacity retention during the first 100 cycles at the charge−discharge rate of 0.5 C. Moreover, the binding energy between Mn (II) and other components in the solvation structure remarkably increases due to more anions coordinating with Mn (II). This immobilizes Mn (II) in the bulk electrolyte and inhibits its deposition on the anode. Besides, benefiting from anion-rich solvation structure in weakly solvating electrolyte, a stable and uniform solid electrolyte interphase rich in inorganics is formed. It not only suppresses the reduction and deposition of Mn (II), but also promotes the migration kinetics of Li + across the interfaces, consequently inhibiting the capacity fade. This study provides a new strategy for designing electrolyte systems with low viscosity, low cost, and high resistance to Mn (II) deposition.

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Revealing the critical effect of solid electrolyte interphase on the deposition and detriment of Co(Ⅱ) ions to graphite anode

Cited by 18 publications

References 53 publications

Cobalt‐Free Cathode Materials: Families and their Prospects

Cobalt‐Free Cathode Materials: Families and their Prospects

The significance of detecting imperceptible physical/chemical changes/reactions in lithium-ion batteries: a perspective

Inhibition Mechanism of Weakly Solvating Electrolyte against Capacity Fade Caused by Mn (II) Deposition in Lithium-Ion Batteries

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