Elastic and well-aligned ceramic LLZO nanofiber based electrolytes for solid-state lithium batteries

Zhao, Yun; Yan, Jianhua; Cai, Weiping; Lai, Yimei; Song, Jun; Yu, Jianyong; Ding, Bin

doi:10.1016/j.ensm.2019.04.043

Cited by 169 publications

(117 citation statements)

References 45 publications

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“…[ 30 ] The space group of tetragonal structure LLZO is I4 1 /acd with a lattice constant of a = 13.134(4) Å, c = 12.663(8) Å, c/a = 0.9641 ( Figure 3 a). [ 31 ] The space group of cubic structure LLZO is Ia‐3d , showing a lattice constant of a = 12.9827(4) Å (Figure 3c). [ 32 ] Sixfold coordinated ZrO 6 octahedral and eightfold coordinated LaO 8 dodecahedra form the LLZO structure, which has no structure difference between t‐LLZO and c‐LLZO.…”

Section: Structure and Ionic Conductivity Of Llzomentioning

confidence: 99%

Garnet Solid Electrolyte for Advanced All‐Solid‐State Li Batteries

Deng

et al. 2020

Advanced Energy Materials

263

168

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High‐capacity cathodes and anodes in energy storage area are required for delivering high energy density due to the ever‐increasing demands in the applications of electric vehicles and power grids, which suffer from significant safety concerns and poor cycling stability at the current stage. All‐solid‐state lithium batteries (ASSLBs) have been considered to be particularly promising within the new generation of energy storage, owing to the superiority of safety, wide potential window, and long cycling life. As the key component in ASSLBs, individual solid electrolytes that can meet practical application standards are very rare due to poor performance. To the present day, numerous research efforts have been expended to find applicable solid‐state electrolytes and tremendous progress has been achieved, especially for garnet‐type solid electrolytes. Nevertheless, the garnet‐type solid electrolyte is still facing some crucial dilemmas. Hence, the issues of garnet electrolytes' ionic conductivity, the interfaces between electrodes and garnet solid electrolytes, and application of theoretical calculation on garnet electrolytes are focuses in this review. Furthermore, prospective developments and alternative approaches to the issues are presented, with an aim to improve understanding of garnet electrolytes and promote their practical applications in solid‐state batteries.

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Section: Structure and Ionic Conductivity Of Llzomentioning

confidence: 99%

Garnet Solid Electrolyte for Advanced All‐Solid‐State Li Batteries

Deng

et al. 2020

Advanced Energy Materials

263

168

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“…An effective way to create flexible crystals is to construct fibrous structures with high length‐to‐diameter ( L / D ) ratios . Since fragmentation and cracking easily occur at grain boundaries, the crystal size should be refined to enlarge these boundaries.…”

Section: Introductionmentioning

confidence: 99%

Polymer Template Synthesis of Flexible BaTiO₃ Crystal Nanofibers

Yan

Han

Xia

et al. 2019

Adv Funct Materials

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156

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BaTiO 3 crystals are attractive materials due to their high dielectric properties, but they are brittle and inelastic ceramics, which limits their broader applications in emerging fields, such as flexible electronics. A scalable strategy for the fabrication of ultra-flexible crystalline BaTiO 3 nanofiber (NF) films by a sol-gel electrospinning method, followed by a brief calcination, is reported. It facilitates the formation of perovskite BaTiO 3 crystals with intricate grain boundaries at a low temperatures by growing them within polymer NF templates. The ceramic films have a polymer-like softness of 50 mN, a large Young's modulus of 61 MPa, and an elastic strain of 0.9%. Moreover, they have a low density of 28 mg cm −3 and demonstrate superior softness without fracture after deformation. Piezoelectric sensors fabricated based on these films exhibit a high sensitivity of 80 ms with an output voltage of 1.05 V at a pressure of 100 kPa. This approach allows for the largescale fabrication of flexible BaTiO 3 crystal NF films.

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“…In solid-state lithium batteries, ceramic electrolytes have received widespread attention, such as garnet-type Li7La3Zr2O12(LLZO) [14] and NASICON-type Li1+xAlxTi2-x(PO4)3(LATP) [15] or Li1.5Al0.5Ge1.5(PO4)3(LAGP) [16]. Due to its excellent ion conductivity, chemical stability and wide electrochemical window relative to lithium metal, some of them have become a new class of solid-state electrolyte system(SSEs) [17].…”

Section: Introductionmentioning

confidence: 99%

Structural evolution of plasma sprayed amorphous Li4Ti5O12 electrode and ceramic/polymer composite electrolyte during electrochemical cycle of quasi-solid-state lithium battery

Liang

Zhang

et al. 2020

Preprint

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Solid-state batteries are one of the effective way to solve the safety of traditional power and energy storage batteries with flammable liquid electrolyte. This time, a quasi-solid-state lithium battery is assembled by plasma sprayed amorphous Li 4 Ti 5 O 12 (LTO) electrode and ceramic/polymer composite electrolyte with a little liquid electrolyte (10 μl/cm 2 ) to provide the outstanding electrochemical stability and better than normal interface contact. SEM, STEM, TEM and EDS were used to analyze the structure evolution and performance of plasma sprayed amorphous LTO electrode and ceramic/polymer composite electrolyte before and after electrochemical experiments. By comparing the electrochemical performance of the amorphous LTO electrode and the traditional LTO electrode, the electrochemical behavior of different electrodes is studied. The results show that plasma spraying can prepare an amorphous Li 4 Ti 5 O 12 electrode coating of about 8 μm. After 200 electrochemical cycles, the structure of the electrode evolved, and the inside of the electrode fractured and cracks expanded, because of recrystallization at the interface between the rich fluorine compounds and the amorphous LTO electrode. Similarly, the ceramic/polymer composite electrolyte has undergone structural evolution after 200 cycles test. The electrochemical cycle results show that the cycle stability, capacity retention rate, coulomb efficiency, and internal impedance of amorphous LTO electrodes are better than traditional LTO electrode. This innovative and facile quasi-solid-state strategy is aimed to promote the intrinsic safety and stability of working lithium battery, shedding light on the development of next-generation high-performance solid-state lithium batteries.

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Elastic and well-aligned ceramic LLZO nanofiber based electrolytes for solid-state lithium batteries

Cited by 169 publications

References 45 publications

Garnet Solid Electrolyte for Advanced All‐Solid‐State Li Batteries

Garnet Solid Electrolyte for Advanced All‐Solid‐State Li Batteries

Polymer Template Synthesis of Flexible BaTiO₃ Crystal Nanofibers

Structural evolution of plasma sprayed amorphous Li4Ti5O12 electrode and ceramic/polymer composite electrolyte during electrochemical cycle of quasi-solid-state lithium battery

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Elastic and well-aligned ceramic LLZO nanofiber based electrolytes for solid-state lithium batteries

Cited by 169 publications

References 45 publications

Garnet Solid Electrolyte for Advanced All‐Solid‐State Li Batteries

Garnet Solid Electrolyte for Advanced All‐Solid‐State Li Batteries

Polymer Template Synthesis of Flexible BaTiO3 Crystal Nanofibers

Structural evolution of plasma sprayed amorphous Li4Ti5O12 electrode and ceramic/polymer composite electrolyte during electrochemical cycle of quasi-solid-state lithium battery

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Product

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Polymer Template Synthesis of Flexible BaTiO₃ Crystal Nanofibers