Is Li4Ti5O12a solid-electrolyte-interphase-free electrode material in Li-ion batteries? Reactivity between the Li4Ti5O12electrode and electrolyte

Song, Myoung‐Chong; Kim, Ryoung Hee; Baek, Seung Wook; Lee, Kug‐Seung; Park, Kyusung; Benayad, Anass

doi:10.1039/c3ta12728a

Cited by 108 publications

(90 citation statements)

References 19 publications

(14 reference statements)

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“…Therefore, we compared the cyclability of LTO-SP and LTO-LP in the 3% and 0% carbon containing electrodes at different temperatures. In contrast to the results of Song et al [24] the cyclability of the carbon free and carbon containing LTO electrodes had no significant difference at 60 °C as seen in Figure 4a. The capacity of both the carbon free and carbon containing electrodes started to decrease very fast around 50 or 60 cycles and there was also no difference between the LTO-SP and LTO-LP electrodes.…”

Section: Resultscontrasting

confidence: 56%

“…The capacity of both the carbon free and carbon containing electrodes started to decrease very fast around 50 or 60 cycles and there was also no difference between the LTO-SP and LTO-LP electrodes. The particle size of LTO in our experiments is considerably smaller than in [24] and larger surface area might increase the reactivity of LTO towards electrolyte and thus explain the poorer high temperature cyclability results of our carbon free electrodes. Room temperature performance of LTO-SP and LTO-LP electrodes with and without carbon additives are presented in Figure 4b and cycle life behavior was similar with other samples except LTO-SP containing 0% carbon which showed slightly poorer cycle life behavior.…”

Section: Resultsmentioning

confidence: 91%

“…It has also been reported by Song et al. that carbon additives in LTO electrodes affect SEI formation and the reactivity towards electrolyte was increased at high temperatures in the presence carbon additives in the electrodes [24]. Therefore, we compared the cyclability of LTO-SP and LTO-LP in the 3% and 0% carbon containing electrodes at different temperatures.…”

Section: Resultsmentioning

confidence: 99%

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Comparative study of carbon free and carbon containing Li4Ti5O12 electrodes

Pohjalainen

Kallioinen²,

Kallio

2015

Journal of Power Sources

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Traditionally electrodes for lithium ion batteries are manufactured using carbon additives to increase the conductivity. However, in case of lithium titanate, Li4Ti5O12 (LTO), carbon free electrodes have gathered some interest lately. Therefore two LTO materials synthetized using the same synthesis but different end milling process resulting in materials with different particle size and surface area are compared here using electrodes manufactured with and without carbon additives. Both LTO samples (LTO-SP with small primary particle size and high surface area, and LTO-LP with larger primary particle size and small surface area) produce similar capacities and voltages with or without carbon additives at low C-rates at the room temperature. However, at high C-rates and/or sub-zero temperatures electrodes with carbon additives produce higher capacities and smaller ohmic losses and this behavior is more pronounced for the LTO electrodes with smaller primary particle size and larger surface area. These results show that the feasibility of carbon free LTO electrodes depends on the properties of LTO affecting the morphology of the electrode and consequently, the transport properties. This is most pronounced under conditions where electron and Li + ion transfer become limiting (high C-rates and low temperature).

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Section: Resultscontrasting

confidence: 56%

Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

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Comparative study of carbon free and carbon containing Li4Ti5O12 electrodes

Pohjalainen

Kallioinen²,

Kallio

2015

Journal of Power Sources

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“…Many previous works have reported that the voltage corresponding to the reaction of LTO with lithium (1.55 V vs. Li/Li + ) is too high to reductively decompose electrolytes. However, recent studies have demonstrated that electrolyte decomposition does occur and generates surface films on the LTO surface, even when the cell is operated within the stability window of the common salts and solvents used in LIBs [23][24][25][26][27][28]. Song et al [27] reported the formation of a surface film on an LTO surface, which is significantly enhanced by the presence of conductive carbon in the composite LTO electrodes.…”

Section: Introductionmentioning

confidence: 99%

“…However, recent studies have demonstrated that electrolyte decomposition does occur and generates surface films on the LTO surface, even when the cell is operated within the stability window of the common salts and solvents used in LIBs [23][24][25][26][27][28]. Song et al [27] reported the formation of a surface film on an LTO surface, which is significantly enhanced by the presence of conductive carbon in the composite LTO electrodes. Kitta et al [25,28] found that the SEI layer generated during the first cycle prevents irreversible structural changes on the LTO surface.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pre-Cycling Rate on the Passivating Ability of Surface Films on Li₄Ti₅O₁₂ Electrodes

Jung

Hah²,

Lee

et al. 2017

Journal of Electrochemical Science and Technology

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A comparative study was performed on the passivating abilities of surface films generated on lithium titanate (LTO; Li) electrodes during pre-cycling at two different rates. The surface film deposited at a faster pre-cycling rate (i.e., 0.5 C) is irregularly shaped and unevenly covers the LTO electrode. Owing to the incomplete coverage of the protective film, this LTO electrode exhibits poor passivating ability. Additional electrolyte decomposition and concomitant film deposition occur during subsequent charge/discharge cycles. As a result of the thick surface film, severe cell polarization occurs and eventually causes cell failure. However, pre-cycling the Li/LTO cell at a slower rate (0.1 C) improves cell polarization and capacity retention; this occurs because the surface film uniformly covers the LTO electrode and provides strong passivation. Accordingly, there is no significant film deposition during subsequent charge/discharge cycling. Additionally, self-discharge is reduced during high-temperature storage.

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Alloying Effects on the Phase Transformation Behaviors of the Orthorhombic and Ordered ω Phases in High Nb–TiAl Alloys

Song

et al. 2017

Adv Eng Mater

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In this work, alloying effects of Mn, Mo, and Cr on the phase transformation behaviors of the orthorhombic and ordered v phases in high Nb-TiAl are investigated. Modulated structures are observed in the Mn and Mo-containing alloys indicating that Mn and Mo cannot hinder the formation of the orthorhombic phase while Cr hinders the formation of the orthorhombic phase completely. For the ordered v phases, small ordered v particles are observed in the Mn-containing alloy. Though Mn cannot hinder the formation of the ordered v phases, the formation temperature of which is decreased to 600 C. No ordered v phases are observed in the Mo and Cr-containing alloys. Two percent of Mo and Cr hinder the formation of the ordered v phases completely. The stabilization effect of Mn, Mo, and Cr on bo phase is mainly a thermodynamic effect.

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Is Li₄Ti₅O₁₂a solid-electrolyte-interphase-free electrode material in Li-ion batteries? Reactivity between the Li₄Ti₅O₁₂electrode and electrolyte

Cited by 108 publications

References 19 publications

Comparative study of carbon free and carbon containing Li4Ti5O12 electrodes

Comparative study of carbon free and carbon containing Li4Ti5O12 electrodes

Effect of Pre-Cycling Rate on the Passivating Ability of Surface Films on Li₄Ti₅O₁₂ Electrodes

Alloying Effects on the Phase Transformation Behaviors of the Orthorhombic and Ordered ω Phases in High Nb–TiAl Alloys

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Is Li4Ti5O12a solid-electrolyte-interphase-free electrode material in Li-ion batteries? Reactivity between the Li4Ti5O12electrode and electrolyte

Cited by 108 publications

References 19 publications

Comparative study of carbon free and carbon containing Li4Ti5O12 electrodes

Comparative study of carbon free and carbon containing Li4Ti5O12 electrodes

Effect of Pre-Cycling Rate on the Passivating Ability of Surface Films on Li4Ti5O12 Electrodes

Alloying Effects on the Phase Transformation Behaviors of the Orthorhombic and Ordered ω Phases in High Nb–TiAl Alloys

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Product

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Is Li₄Ti₅O₁₂a solid-electrolyte-interphase-free electrode material in Li-ion batteries? Reactivity between the Li₄Ti₅O₁₂electrode and electrolyte

Effect of Pre-Cycling Rate on the Passivating Ability of Surface Films on Li₄Ti₅O₁₂ Electrodes