Aqueous processing of flexible, free-standing Li4Ti5O12 electrodes for Li-ion batteries

Piffet, Caroline; Vertruyen, Bénédicte; Caes, Sébastien; Thomassin, Jean‐Michel; Broze, Guy; Malherbe, Cédric; Boschini, Frèdéric; Cloots, Rudi; Mahmoud, Abdelfattah

doi:10.1016/j.cej.2020.125508

Cited by 12 publications

(10 citation statements)

References 61 publications

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“…LTO and CNT are fabricated using a water-based process, confirming that they are well-mixed. The LTO is wrapped in the CNT network, which exhibits good electrical conductivity and Li + diffusivity [21]. Therefore, the electrical conductivity and Li + diffusivity of the electrodes are expected to improve.…”

Section: Resultsmentioning

confidence: 99%

“…Multi-walled carbon nanotubes (MWCNTs) have high electrical conductivity (approximately 10 3 -10 5 S cm −1 ), excellent mechanical properties, Energies 2022, 15, 8585 2 of 9 and are lightweight [16,18]. It has been reported that there are the sol-gel method [19], blade method [20], and water-based process [21] for manufacturing electrodes. The sol-gel method can be synthesized at a low temperature close to room temperature and is inexpensive.…”

Section: Introductionmentioning

confidence: 99%

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Free-Standing Li4Ti5O12/Carbon Nanotube Electrodes for Flexible Lithium-Ion Batteries

et al. 2022

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Lithium-ion batteries (LIBs) have been used in many fields, such as consumer electronics and automotive and grid storage, and its applications continue to expand. Several studies have attempted to improve the performance of LIBs. In particular, the use of high-capacity silicon and tin as anodes has been widely studied. Although anodes composed of silicone and tin have high theoretical capacities, poor electrical conductivity and considerable volume expansion of such anodes deteriorate the LIB performance. Thus, Li4Ti5O12 (LTO), a zero-strain material, has attracted much attention with high cycle stability and rate capability through improved electrical conductivity. However, LTO has the disadvantages of a low electrical conductivity (10−8 to 10−13 S cm−1) and moderate Li+ ion diffusion coefficient (10−9 to 10−16 cm2 s−1). In this study, the flexible and free-standing composite films were fabricated using only LTO and multi-walled carbon nanotube(CNT) with high electrical conductivity and ion diffusivity. The prepared LTO/CNT films showed a higher charge/discharge capacity than the theoretical capacity of the LTO electrode.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Free-Standing Li4Ti5O12/Carbon Nanotube Electrodes for Flexible Lithium-Ion Batteries

et al. 2022

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“…In a typical synthesis, LTO powders are prepared by heating at 850 °C for 2 h under air a precursor obtained by spray-drying an aqueous suspension of TiO 2 and LiOH∙H 2 O taking a stoichiometric ratio Li:Ti = 4:5. The spray-drying experiments are conducted using a rotating injector with inlet temperature 190 °C, outlet temperature 110 °C, feed rate 25 mL min −1 and air pressure of 3 bars [ 430 ]. Yuan et al [ 431 ] constructed three-dimensional (3D) crumpled graphene sheets wrapped in nano-Li 4 Ti 5 O 12 (LTO@GS) composites using a one-pot spray-drying assisted solid-phase reaction method with anatase TiO 2 as Ti source and LiNO 3 (3% mole excess) as Li source.…”

Section: Synthesis Methodsmentioning

confidence: 99%

Fabrication of Li4Ti5O12 (LTO) as Anode Material for Li-Ion Batteries

Julien,

Mauger

2024

Micromachines

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The most popular anode material in commercial Li-ion batteries is still graphite. However, its low intercalation potential is close to that of lithium, which results in the dendritic growth of lithium at its surface, and the formation of a passivation film that limits the rate capability and may result in safety hazards. High-performance anodes are thus needed. In this context, lithium titanite oxide (LTO) has attracted attention as this anode material has important advantages. Due to its higher lithium intercalation potential (1.55 V vs. Li+/Li), the dendritic deposition of lithium is avoided, and the safety is increased. In addition, LTO is a zero-strain material, as the volume change upon lithiation-delithiation is negligible, which increases the cycle life of the battery. Finally, the diffusion coefficient of Li+ in LTO (2 × 10−8 cm2 s−1) is larger than in graphite, which, added to the fact that the dendritic effect is avoided, increases importantly the rate capability. The LTO anode has two drawbacks. The energy density of the cells equipped with LTO anode is lower compared with the same cells with graphite anode, because the capacity of LTO is limited to 175 mAh g−1, and because of the higher redox potential. The main drawback, however, is the low electrical conductivity (10−13 S cm−1) and ionic conductivity (10−13–10−9 cm2 s−1). Different strategies have been used to address this drawback: nano-structuration of LTO to reduce the path of Li+ ions and electrons inside LTO, ion doping, and incorporation of conductive nanomaterials. The synthesis of LTO with the appropriate structure and the optimized doping and the synthesis of composites incorporating conductive materials is thus the key to achieving high-rate capability. That is why a variety of synthesis recipes have been published on the LTO-based anodes. The progress in the synthesis of LTO-based anodes in recent years is such that LTO is now considered a substitute for graphite in lithium-ion batteries for many applications, including electric cars and energy storage to solve intermittence problems of wind mills and photovoltaic plants. In this review, we examine the different techniques performed to fabricate LTO nanostructures. Details of the synthesis recipes and their relation to electrochemical performance are reported, allowing the extraction of the most powerful synthesis processes in relation to the recent experimental results.

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“…So far, a variety of FARLIBs have been reported as ideal candidates for wearable electronic devices. [12][13][14][15][16][17][18] It is worth noting that the critical factor to the development of FARLIBs is to develop high-performance cathode or anode materials. However, most of these previously reported cathode or anode materials are in powder form, which are usually prepared by high temperature treatment method.…”

Section: Introductionmentioning

confidence: 99%

Boosting Li‐Ion Storage Capability of Self‐Standing Ni‐Doped LiMn₂O₄ Nanowall Arrays as Superior Cathodes for High‐Performance Flexible Aqueous Rechargeable Li‐Ions Batteries

Zhang

Lan

Feng

et al. 2022

Adv Materials Inter

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To meet the increasing desire for a means of powering wearable and portable devices, the development of high‐performance flexible aqueous rechargeable lithium‐ion batteries (FARLIBs) would be greatly desirable. The design of binder‐free cathode materials with 3D architectures is the key to develop FARLIBs. Herein, self‐standing 3D Ni‐doped LiMn2O4 (NLMO) nanosheets are successfully prepared assembled by nanowall arrays (NWAs) directly grown on carbon cloth (CC) as the cathode for LIBs, which is performed to slow down the dissolution of Mn and the Jahn–Teller effect of LiMn2O4 during the reaction process. The as‐prepared NLMO NWAs/CC electrode delivers a high capacity of 113.27 mAh g−1 at a current density of 1 A g−1, and can also have a capacity retention rate of 81% after 500 cycles at 10 A g−1, both higher than that of pure LiMn2O4. The results of density functional theory simulation demonstrate that the Ni‐doped LiMn2O4 can significantly decrease the bandgap and Li ions diffusion barriers. A quasi‐solid‐state FARLIB is successfully constructed by using NLMO NWAs/CC as the positive electrode and rugby‐shaped NaTi2(PO4)3/CC as the negative electrode, exhibiting remarkable electrochemical performance and flexibility. These results offer a new opportunity for developing high‐performance FARLIB.

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Aqueous processing of flexible, free-standing Li4Ti5O12 electrodes for Li-ion batteries

Cited by 12 publications

References 61 publications

Free-Standing Li4Ti5O12/Carbon Nanotube Electrodes for Flexible Lithium-Ion Batteries

Free-Standing Li4Ti5O12/Carbon Nanotube Electrodes for Flexible Lithium-Ion Batteries

Fabrication of Li4Ti5O12 (LTO) as Anode Material for Li-Ion Batteries

Boosting Li‐Ion Storage Capability of Self‐Standing Ni‐Doped LiMn₂O₄ Nanowall Arrays as Superior Cathodes for High‐Performance Flexible Aqueous Rechargeable Li‐Ions Batteries

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Aqueous processing of flexible, free-standing Li4Ti5O12 electrodes for Li-ion batteries

Cited by 12 publications

References 61 publications

Free-Standing Li4Ti5O12/Carbon Nanotube Electrodes for Flexible Lithium-Ion Batteries

Free-Standing Li4Ti5O12/Carbon Nanotube Electrodes for Flexible Lithium-Ion Batteries

Fabrication of Li4Ti5O12 (LTO) as Anode Material for Li-Ion Batteries

Boosting Li‐Ion Storage Capability of Self‐Standing Ni‐Doped LiMn2O4 Nanowall Arrays as Superior Cathodes for High‐Performance Flexible Aqueous Rechargeable Li‐Ions Batteries

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Boosting Li‐Ion Storage Capability of Self‐Standing Ni‐Doped LiMn₂O₄ Nanowall Arrays as Superior Cathodes for High‐Performance Flexible Aqueous Rechargeable Li‐Ions Batteries