A flexible mesoporous Li4Ti5O12-rGO nanocomposite film as free-standing anode for high rate lithium ion batteries

Zhu, Kunxu; Gao, Hanyang; Hu, Guoxin

doi:10.1016/j.jpowsour.2017.11.053

Cited by 59 publications

(35 citation statements)

References 44 publications

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“…Meanwhile, the electrochemical properties of the designed N‐LTO@TiC/C electrode are also better than many other published LTO‐based materials (see Table S2, Supporting Information). Set at 10 C, the capacity degradation of our N‐LTO@TiC/C electrode is only 0.007% per 100 cycles, much lower than LTO/CNT/CNF film (0.72%), LTO‐rGO film (1%), and microspheres LTO electrode (1.58%), respectively, fully indicating the advantages of our dual “inside and outside” strategies. In addition, the enhanced performance of the N‐LTO@TiC/C electrode is also reflected at elevated working temperature (50 °C) (Figures S5–S7, Supporting Information).…”

Section: Resultsmentioning

confidence: 73%

“…Spinel lithium titanate (Li 4 Ti 5 O 12 , LTO) is considered as a promising anode for fast energy storage due to its zero‐strain characteristics during phase transformation process . Though low volume expansion ratio (<0.2%) could ensure the structure stability during long‐term cycles, the transfer characteristics of ions/electrons in bulk LTO is still low leading to undermined high‐rate performance .…”

Section: Introductionmentioning

confidence: 99%

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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

165

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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: Resultsmentioning

confidence: 73%

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

165

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“…During the fabrication process of binder‐free nanostructured electrodes, a vacuum filtration method is frequently used to fabricate graphene‐based thin films as robust supporting matrixes. For example, Zhu et al [ 151 ] synthesized lithium titanate hydrate (LTH) precursors directly on GO through a hydrothermal method. Then, the precursors were assembled into a LTH‐GO thin film by vacuum filtration and converted to Li 4 Ti 5 O 12 ‐rGO through subsequent calcination ( Figure ).…”

Section: Binder‐free Nanostructured Electrodes For Libsmentioning

confidence: 99%

“…The relationship between loading mass of active materials and prices of corresponding supporting matrixes for binder‐free electrodes in LIBs. [ 48–109,141–240 ] ...…”

Section: Applications Of Binder‐free Nanostructured Electrodes For Fumentioning

confidence: 99%

Advanced Matrixes for Binder‐Free Nanostructured Electrodes in Lithium‐Ion Batteries

et al. 2020

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Commercial lithium‐ion batteries (LIBs), limited by their insufficient reversible capacity, short cyclability, and high cost, are facing ever‐growing requirements for further increases in power capability, energy density, lifespan, and flexibility. The presence of insulating and electrochemically inactive binders in commercial LIB electrodes causes uneven active material distribution and poor contact of these materials with substrates, reducing battery performance. Thus, nanostructured electrodes with binder‐free designs are developed and have numerous advantages including large surface area, robust adhesion to substrates, high areal/specific capacity, fast electron/ion transfer, and free space for alleviating volume expansion, leading to superior battery performance. Herein, recent progress on different kinds of supporting matrixes including metals, carbonaceous materials, and polymers as well as other substrates for binder‐free nanostructured electrodes in LIBs are summarized systematically. Furthermore, the potential applications of these binder‐free nanostructured electrodes in practical full‐cell‐configuration LIBs, in particular fully flexible/stretchable LIBs, are outlined in detail. Finally, the future opportunities and challenges for such full‐cell LIBs based on binder‐free nanostructured electrodes are discussed.

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“…Substituting Equations (4), (6), (8), and (19) into Equation (18), the plastic strain energy ratio is written by…”

Section: Influence Of Jellyroll Core On Energy Absorptionmentioning

confidence: 99%

Resistance exterior force property of lithium‐ion pouch batteries with different positive materials

Hao

Xie

et al. 2019

Int J Energy Res

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Summary Lithium‐ion pouch battery (LIPB) is widely applied in different engineering fields, such as electric vehicles, aeronautics, astronautics, and among others. However, few complete mechanical models with deformation field are presented to predict internal short circuit (ISC) and resistance exterior force property of LIPB under exterior loading. In the present research, the indentation theoretical models with sinusoidal shape function are established to investigate resistance exterior force property of batteries with different positive materials under different punch shapes loading. The effects of indentation displacement and deformation region on indentation force are carried out. By the comparison of indentation force, present theoretical and numerical results are consistent with previous experimental results. The indentation force increases with the punch radius increase, but decreases with the indentation displacement increase. On the basis of energy conservation law, it is concluded that LIPB is more likely to produce mechanical failure and ISC when normalized deformation region is greater than or equal to 0.4 and plastic strain energy ratio is greater than or equal to 1.5. In addition, from resistance exterior force property point of view, LIPB has a better property to resist external force when LiMnNiCoO2, rather than LiCoO2 and Nanophosphate, is used as positive material. The research provides a reference for assessing the safety of LIPB and selecting suitable positive material, which possesses high energy capacity and resistance exterior force property.

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A flexible mesoporous Li4Ti5O12-rGO nanocomposite film as free-standing anode for high rate lithium ion batteries

Cited by 59 publications

References 44 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

Advanced Matrixes for Binder‐Free Nanostructured Electrodes in Lithium‐Ion Batteries

Resistance exterior force property of lithium‐ion pouch batteries with different positive materials

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A flexible mesoporous Li4Ti5O12-rGO nanocomposite film as free-standing anode for high rate lithium ion batteries

Cited by 59 publications

References 44 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

Advanced Matrixes for Binder‐Free Nanostructured Electrodes in Lithium‐Ion Batteries

Resistance exterior force property of lithium‐ion pouch batteries with different positive materials

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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