Additive-free synthesis of Li4Ti5O12nanowire arrays on freestanding ultrathin graphite as a hybrid anode for flexible lithium ion batteries

Kim, Seong Dae; Rana, Kuldeep; Ahn, Jong Hyun

doi:10.1039/c6ta09059a

Cited by 27 publications

(17 citation statements)

References 67 publications

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“…To realize this goal, scientific researchers keep plugging away for pursuing fast rechargeable lithium ion batteries (LIBs) with high‐power density and good cycling life . Given all that, the innovation of electrode materials is playing a crucial role to obtain advanced power‐type LIBs . However, common anode materials such as graphite‐based materials, silicon, metal oxides cannot meet the ultrahigh‐rate application due to slow reaction kinetics and pulverization issue arising from huge volume change during charge/discharge process .…”

Section: Introductionmentioning

confidence: 99%

Enhancing Ultrafast Lithium Ion Storage of Li₄Ti₅O₁₂ by Tailored TiC/C Core/Shell Skeleton Plus Nitrogen Doping

Yao

Xia

Xie

et al. 2018

Adv Funct Materials

160

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C skeleton to realize enhanced ultrafast Li ion storage is reported. Interlinked hydrothermalsynthesized N-LTO nanosheets are homogeneously decorated on the chemical vapor deposition (CVD) derived TiC/C nanowires forming binderfree N-LTO@TiC/C core-branch arrays. Positive advantages including large surface area, strong mechanical stability, and enhanced electronic/ ionic conductivity are obtained in the designed integrated arrays and rooted upon synergistic TiC/C matrix and N doping. The above appealing features can effectively boost kinetic properties throughout the N-LTO@TiC/C electrodes to realize outstanding high-rate capability at different working temperatures (143 mAh g −1 /10 C at 25 °C and 122 mAh g −1 /50 C at 50 °C) and notable cycling stability with a capacity retention of 99.3% after 10 000 cycles at 10 C. Moreover, superior high-rate cycling life is also demonstrated for the full cells with N-LTO@TiC/C anode and LiFePO 4 cathode. The dual strategy may provoke wide interests in fast energy storage areas and motivate the further performance improvement of power-type lithium ion batteries (LIBs).

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Section: Introductionmentioning

confidence: 99%

Enhancing Ultrafast Lithium Ion Storage of Li₄Ti₅O₁₂ by Tailored TiC/C Core/Shell Skeleton Plus Nitrogen Doping

Yao

Xia

Xie

et al. 2018

Adv Funct Materials

160

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show abstract

“…Most carbon materials cannot be used in flexible electronics. For example, a binder-free electrode based on graphite paper can only maintain 25 cycles in a bent state [167]. Comparing with other carbon materials, carbon cloth with excellent flexibility and electrical conductivity is one of the most promising materials for the flexible battery application.…”

Section: Application In Flexible Batteriesmentioning

confidence: 99%

Binder-Free Electrodes and Their Application for Li-Ion Batteries

Kang¹,

Deng

Chen³

et al. 2020

Nanoscale Res Lett

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Lithium-ion batteries (LIB) as energy supply and storage systems have been widely used in electronics, electric vehicles, and utility grids. However, there is an increasing demand to enhance the energy density of LIB. Therefore, the development of new electrode materials with high energy density becomes significant. Although many novel materials have been discovered, issues remain as (1) the weak interaction and interface problem between the binder and the active material (metal oxide, Si, Li, S, etc.), (2) large volume change, (3) low ion/electron conductivity, and (4) selfaggregation of active materials during charge and discharge processes. Currently, the binder-free electrode serves as a promising candidate to address the issues above. Firstly, the interface problem of the binder and active materials can be solved by fixing the active material directly to the conductive substrate. Secondly, the large volume expansion of active materials can be accommodated by the porosity of the binder-free electrode. Thirdly, the ion and electron conductivity can be enhanced by the close contact between the conductive substrate and the active material. Therefore, the binderfree electrode generally exhibits excellent electrochemical performances. The traditional manufacture process contains electrochemically inactive binders and conductive materials, which reduces the specific capacity and energy density of the active materials. When the binder and the conductive material are eliminated, the energy density of the battery can be largely improved. This review presents the preparation, application, and outlook of binder-free electrodes. First, different conductive substrates are introduced, which serve as carriers for the active materials. It is followed by the binderfree electrode fabrication method from the perspectives of chemistry, physics, and electricity. Subsequently, the application of the binder-free electrode in the field of the flexible battery is presented. Finally, the outlook in terms of these processing methods and the applications are provided.

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“…Kim et al . have reported a particularly hydrothermal‐based route for the synthesis of Li 4 Ti 5 O 12 nanowires array, which the synthesis process and the corresponding morphology are distinctly exhibited in Figure . Because of the binder‐free feature and highly‐ordered array architecture, the Li 4 Ti 5 O 12 nanowires array growing on freestanding ultrathin graphite (LTO‐FSG) electrode exhibits an extremely high rate capacity (104 mAh g ‐1 at 60C).…”

Section: Modification Process Of Li4ti5o12mentioning

confidence: 99%

Li₄Ti₅O₁₂ Anode: Structural Design from Material to Electrode and the Construction of Energy Storage Devices

Chen

et al. 2017

The Chemical Record

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Spinel Li Ti O , known as a zero-strain material, is capable to be a competent anode material for promising applications in state-of-art electrochemical energy storage devices (EESDs). Compared with commercial graphite, spinel Li Ti O offers a high operating potential of ∼1.55 V vs Li/Li , negligible volume expansion during Li intercalation process and excellent thermal stability, leading to high safety and favorable cyclability. Despite the merits of Li Ti O been presented, there still remains the issue of Li Ti O suffering from poor electronic conductivity, manifesting disadvantageous rate performance. Typically, a material modification process of Li Ti O will be proposed to overcome such an issue. However, the previous reports have made few investigations and achievements to analyze the subsequent processes after a material modification process. In this review, we attempt to put considerable interest in complete device design and assembly process with its material structure design (or modification process), electrode structure design and device construction design. Moreover, we have systematically concluded a series of representative design schemes, which can be divided into three major categories involving: (1) nanostructures design, conductive material coating process and doping process on material level; (2) self-supporting or flexible electrode structure design on electrode level; (3) rational assembling of lithium ion full cell or lithium ion capacitor on device level. We believe that these rational designs can give an advanced performance for Li Ti O -based energy storage device and deliver a deep inspiration.

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Additive-free synthesis of Li₄Ti₅O₁₂nanowire arrays on freestanding ultrathin graphite as a hybrid anode for flexible lithium ion batteries

Cited by 27 publications

References 67 publications

Enhancing Ultrafast Lithium Ion Storage of Li₄Ti₅O₁₂ by Tailored TiC/C Core/Shell Skeleton Plus Nitrogen Doping

Enhancing Ultrafast Lithium Ion Storage of Li₄Ti₅O₁₂ by Tailored TiC/C Core/Shell Skeleton Plus Nitrogen Doping

Binder-Free Electrodes and Their Application for Li-Ion Batteries

Li₄Ti₅O₁₂ Anode: Structural Design from Material to Electrode and the Construction of Energy Storage Devices

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Additive-free synthesis of Li4Ti5O12nanowire arrays on freestanding ultrathin graphite as a hybrid anode for flexible lithium ion batteries

Cited by 27 publications

References 67 publications

Enhancing Ultrafast Lithium Ion Storage of Li4Ti5O12 by Tailored TiC/C Core/Shell Skeleton Plus Nitrogen Doping

Enhancing Ultrafast Lithium Ion Storage of Li4Ti5O12 by Tailored TiC/C Core/Shell Skeleton Plus Nitrogen Doping

Binder-Free Electrodes and Their Application for Li-Ion Batteries

Li4Ti5O12 Anode: Structural Design from Material to Electrode and the Construction of Energy Storage Devices

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Product

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Additive-free synthesis of Li₄Ti₅O₁₂nanowire arrays on freestanding ultrathin graphite as a hybrid anode for flexible lithium ion batteries

Enhancing Ultrafast Lithium Ion Storage of Li₄Ti₅O₁₂ by Tailored TiC/C Core/Shell Skeleton Plus Nitrogen Doping

Enhancing Ultrafast Lithium Ion Storage of Li₄Ti₅O₁₂ by Tailored TiC/C Core/Shell Skeleton Plus Nitrogen Doping

Li₄Ti₅O₁₂ Anode: Structural Design from Material to Electrode and the Construction of Energy Storage Devices