A study on capacity fading of lithium-ion battery with manganese spinel positive electrode during cycling

Yang, Li; Takahashi, Michio; Wang, Baofeng

doi:10.1016/j.electacta.2005.09.014

Cited by 147 publications

(119 citation statements)

References 21 publications

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“…37 On the other hand, deposited manganese can effectively catalyze the electrolyte decomposition, which in turn leads to more Mn deposition and gassing. 35,36 This means Mn depositon and electrolyte decomposition (gassing) are highly interrelated and mutually reinforcing.…”

Section: Resultsmentioning

confidence: 99%

“…XPS spectra (Fig. 8) In the case of using LiPF 6 as the electrolyte salt, LiPF 6 can easily react with water, which unavoidably exists in a very low concentration (ppm) in the electrolyte, as shown in the following reaction equations 35,36 LiPF 6 salt itself also undergoes decomposition during reduction in the charge/discharge cycles, the reactions are as follows LiPF 6 → LiF + PF 5 [5]…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Dual Functions of Carbon in Li₄Ti₅O₁₂/C Microspheres

Lei

Wu²,

Luo

et al. 2014

J. Electrochem. Soc.

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Spinel Li 4 Ti 5 O 12 has become an alternative material to replace graphite anodes in terms of solving safety issues and improving battery life-time. Unfortunately, as Li 4 Ti 5 O 12 is an insulator, the low electrical conductivity becomes a major drawback, as it is unfavorable to higher rate capability. In addition to the low electronic conductivity, severe gassing during charge/discharge cycles is a critical but often-overlooked problem of Li 4 ExperimentalMaterials synthesis.-Anatase TiO 2 (220 nm in average particle diameter and 99.5% in purity, Hangzhou Wanjing New Material Co., Ltd) and Li 2 CO 3 (99.9% in purity, Shanghai China Lithium Industrial Co., Ltd.) were used as raw materials. The starting coarse Li 4 Ti 5 O 12 was prepared by a solid-state reaction method as described in a previous work. 26,27 The stoichiometric amounts of Li 2 CO 3 and anatase TiO 2 with molar ratio of Li: Ti = 0.82:1 were mixed with ethanol as dispersant by planetary ballmilling. The ball-milled mixture was heated in a furnace at 800• C in air for 18 h to obtain the coarse materials were first ball-milled without a carbon source and with 5 wt% pitch as a carbon source using water as a dispersant for 1.5 h, respectively. The resultant slurry was then spray dried to obtain the precursors individually. Finally, two precursors were all annealed at 650• C for 6 h in an Ar atmosphere to obtain the final materials.Characterization.-X-ray diffraction (XRD) patterns of the samples were recorded on a Rigaku diffractometer using Cu Kα irradiation. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images were obtained on a Nova NanoSEM 430 and Tecnai F20.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Dual Functions of Carbon in Li₄Ti₅O₁₂/C Microspheres

Lei

Wu²,

Luo

et al. 2014

J. Electrochem. Soc.

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“…4,16,19,21,[27][28][29][30][31][32][33] Since the growth of the SEI layer on negative electrodes is one of the major factors leading to capacity fade in Li-ion batteries, it is important to understand the effect of metal dissolution on the properties of the SEI layer. 21,22,[34][35][36][37][38][39][40][41] Understanding the changes occurring in the electrodes and the associated effect on the electrochemical performance of the cell is important in assessing the long-term behavior of these materials. Most of the reports in this area have been conducted in half cells.…”

mentioning

confidence: 99%

Effects of Dissolved Transition Metals on the Electrochemical Performance and SEI Growth in Lithium-Ion Batteries

Joshi

Eom

Yushin

et al. 2014

J. Electrochem. Soc.

180

161

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Transition metal dissolution is one of the major causes of capacity and power fade in lithium-ion batteries employing transition metal oxides in the positive electrode. Accelerated testing was accomplished by introducing transition-metal salts in the electrolyte in order to study the effects of dissolution on performance. It is shown that metal dissolution causes a reduction in capacity and cycle stability in full cells. The SEI layer resistance in the negative electrode of full cells increases with increasing concentration of transition metal salts. The growth of the SEI layer is non-uniform and is believed to be caused by the reduction of transition metal species in the negative electrode leading to an increase in inorganic component of the SEI layer. Consumption of fossil fuels in the transportation sector is one of the leading causes of greenhouse gas emissions (GHG).1 Efforts to develop cleaner and more efficient alternatives to the internal combustion engine running on petroleum fuels, such as fuel cells and batteries, are on the rise to mitigate this problem. Rechargeable lithium-ion (Li-ion) batteries offer high energy and power densities, good cyclic stability, and low rates of self-discharge. These characteristics are essential for applications in hybrid electric vehicles (HEV), plug-in hybrid vehicles (PHEV), and electric vehicles (EV). Dissolution of transition metals from the positive electrode is a concern for lithium-ion batteries, and manganese dissolution is a major reason for capacity fade in spinel electrodes, including LiMn 2 O 4 . 15Although less susceptible than spinel, metal dissolution does occur in NCM electrodes and has been implicated in a rise in impedance and capacity fade with cycling. 4,16 Two main routes by which capacity fading may occur due to dissolution are (i) structural changes to the positive electrode and leading to reduced insertion capacity and (ii) accelerated growth of the SEI layer at the negative electrode and the resulting irreversible Li consumption. 15,[17][18][19][20][21][22] Capacity fade due to the structural changes occurring in the positive electrode during partial dissolution is more likely in spinel electrodes, where the extent of dissolution is high, or at high potentials (overcharge). This large degree of dissolution in spinels may cause shrinkage of the active material, which decreased the effective transport properties and kinetics of the electrode.20,23 The extent of dissolution in different positive electrode materials was compared by Choi and Manthiram, 18 and amount of Mn dissolution is 16 times greater in LiMn 2 O 4 compared to NCM electrodes. They also reported that structural stability is directly related to the extent of dissolution in electrodes. 18Dissolution may also cause a decrease in cell capacity by increased growth and breakdown of the SEI layer 21,22 on the negative electrode. Although dissolution has been studied extensively in spinel electrode materials and its negative effects on cell capacity have been wellestablished, how dissoluti...

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“…While a larger amount reduction products of the N(SO 2 CF 3 ) 2 -anion formed on the surface of the Cu foil in the RTIL electrolytes than that in the EC/DMC solutions. These results were explained as that the solvents (EC and DMC) were reduced earlier than the N(SO 2 CF 3 ) 2 -anion, which contributed to appearance of the main protective film on the surface of the Cu foil in the EC/DMC solutions, while the reduction products of the N(SO 2 CF 3 ) 2 -anion composed the passivating film on the surface of the Cu foil after the electrochemical measurement in the RTIL electrolytes. With the above CV and XPS results of the Cu foil after the potential swept to 5.0 V in two kinds of electrolytes, it can be concluded that these carbonate and carbonyl species on the surface of the Cu foil in the LiTFSI-EC/ DMC solutions was not stable over 5.0 V and thus the dissolution of the Cu foil appeared, while the reduction products of the N(SO 2 CF 3 ) 2 -anion formed on the surface of the Cu foil after the potential sweeps in the RTIL electrolytes, providing a effective protection for Cu current collector to resist higher voltage for advanced lithium ion batteries.…”

Section: Character Of the Cu Foil Surface After The Electrochemical Mmentioning

confidence: 84%

“…P. Arora et al [1] have summarized the capacity fading mechanisms in lithium ion batteries including the dissolution of Cu current collector. Further research [2] by Yang et al showed that the dissolved Cu ions from the current collector precipitated as Cu oxides on the carbon surface, which blocked the normal intercalation of lithium ions and led to the capacity fading of lithium ion batteries. Besides, Aurbach and Cohen [3] suggested that copper in LiAsF 6 -PC was not completely inert at open-circuit potential (OCP) and contaminants might oxidize the copper.…”

Section: Introductionmentioning

confidence: 97%

Electrochemical behavior of copper current collector in imidazolium-based ionic liquid electrolytes

et al. 2009

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The electrochemical behaviors of copper current collector in 1-alkyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl] imide ionic liquid electrolytes were investigated and compared with that in ethylene carbonate/dimethyl carbonate solutions. Cyclic voltammetry results showed that large oxidation-reduction current of the copper foil appeared in ethylene carbonate/dimethyl carbonate solutions, while a much smaller current in the room temperature ionic liquid electrolytes decreased gradually, indicating that the copper foil was anodically stable. Further study by X-ray photoelectron spectroscopy analysis showed that an unstable product was composed mainly of the carbonate and carbonyl species on the surface of the copper foil after the electrochemical measurement in ethylene carbonate/dimethyl carbonate solutions, leading to the dissolution of the copper foil. While a better passivating film from the reduction of the anions in the room temperature ionic liquid electrolytes covered the surface of copper foil and protected the copper foil from being oxidized even in a higher potential. These results indicate that the use of room temperature ionic liquid electrolytes can improve the stability of copper current collector in the advanced lithium ion batteries.National Grand Fundamental Research 973 Program of China [2006CB202600]; National High Technology Research and Development Plan of China [2007AA03Z222

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A study on capacity fading of lithium-ion battery with manganese spinel positive electrode during cycling

Cited by 147 publications

References 21 publications

Dual Functions of Carbon in Li₄Ti₅O₁₂/C Microspheres

Dual Functions of Carbon in Li₄Ti₅O₁₂/C Microspheres

Effects of Dissolved Transition Metals on the Electrochemical Performance and SEI Growth in Lithium-Ion Batteries

Electrochemical behavior of copper current collector in imidazolium-based ionic liquid electrolytes

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A study on capacity fading of lithium-ion battery with manganese spinel positive electrode during cycling

Cited by 147 publications

References 21 publications

Dual Functions of Carbon in Li4Ti5O12/C Microspheres

Dual Functions of Carbon in Li4Ti5O12/C Microspheres

Effects of Dissolved Transition Metals on the Electrochemical Performance and SEI Growth in Lithium-Ion Batteries

Electrochemical behavior of copper current collector in imidazolium-based ionic liquid electrolytes

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Dual Functions of Carbon in Li₄Ti₅O₁₂/C Microspheres

Dual Functions of Carbon in Li₄Ti₅O₁₂/C Microspheres